react-dom.production.js

/** @license React v16.0.0
 * react-dom.production.min.js
 *
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('react')) :
	typeof define === 'function' && define.amd ? define(['react'], factory) :
	(global.ReactDOM = factory(global.React));
}(this, (function (require$$0) { 'use strict';

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule reactProdInvariant
 * 
 */
/**
 * WARNING: DO NOT manually require this module.
 * This is a replacement for `invariant(...)` used by the error code system
 * and will _only_ be required by the corresponding babel pass.
 * It always throws.
 */

function reactProdInvariant(code) {
  var argCount = arguments.length - 1;

  var message = 'Minified React error #' + code + '; visit ' + 'http://facebook.github.io/react/docs/error-decoder.html?invariant=' + code;

  for (var argIdx = 0; argIdx < argCount; argIdx++) {
    message += '&args[]=' + encodeURIComponent(arguments[argIdx + 1]);
  }

  message += ' for the full message or use the non-minified dev environment' + ' for full errors and additional helpful warnings.';

  var error = new Error(message);
  error.name = 'Invariant Violation';
  error.framesToPop = 1; // we don't care about reactProdInvariant's own frame

  throw error;
}

var reactProdInvariant_1 = reactProdInvariant;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule checkReact
 * 
 */




!require$$0 ? reactProdInvariant_1('227') : void 0;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule DOMNamespaces
 */

var HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
var MATH_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
var SVG_NAMESPACE = 'http://www.w3.org/2000/svg';

var Namespaces = {
  html: HTML_NAMESPACE,
  mathml: MATH_NAMESPACE,
  svg: SVG_NAMESPACE
};

// Assumes there is no parent namespace.
function getIntrinsicNamespace(type) {
  switch (type) {
    case 'svg':
      return SVG_NAMESPACE;
    case 'math':
      return MATH_NAMESPACE;
    default:
      return HTML_NAMESPACE;
  }
}

function getChildNamespace$1(parentNamespace, type) {
  if (parentNamespace == null || parentNamespace === HTML_NAMESPACE) {
    // No (or default) parent namespace: potential entry point.
    return getIntrinsicNamespace(type);
  }
  if (parentNamespace === SVG_NAMESPACE && type === 'foreignObject') {
    // We're leaving SVG.
    return HTML_NAMESPACE;
  }
  // By default, pass namespace below.
  return parentNamespace;
}

var Namespaces_1 = Namespaces;
var getIntrinsicNamespace_1 = getIntrinsicNamespace;
var getChildNamespace_1 = getChildNamespace$1;

var DOMNamespaces = {
	Namespaces: Namespaces_1,
	getIntrinsicNamespace: getIntrinsicNamespace_1,
	getChildNamespace: getChildNamespace_1
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

var canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);

/**
 * Simple, lightweight module assisting with the detection and context of
 * Worker. Helps avoid circular dependencies and allows code to reason about
 * whether or not they are in a Worker, even if they never include the main
 * `ReactWorker` dependency.
 */
var ExecutionEnvironment = {

  canUseDOM: canUseDOM,

  canUseWorkers: typeof Worker !== 'undefined',

  canUseEventListeners: canUseDOM && !!(window.addEventListener || window.attachEvent),

  canUseViewport: canUseDOM && !!window.screen,

  isInWorker: !canUseDOM // For now, this is true - might change in the future.

};

var ExecutionEnvironment_1 = ExecutionEnvironment;

var ReactInternals = require$$0.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;

var assign = ReactInternals.assign;

/**
 * Injectable ordering of event plugins.
 */
var eventPluginOrder = null;

/**
 * Injectable mapping from names to event plugin modules.
 */
var namesToPlugins = {};

/**
 * Recomputes the plugin list using the injected plugins and plugin ordering.
 *
 * @private
 */
function recomputePluginOrdering() {
  if (!eventPluginOrder) {
    // Wait until an `eventPluginOrder` is injected.
    return;
  }
  for (var pluginName in namesToPlugins) {
    var pluginModule = namesToPlugins[pluginName];
    var pluginIndex = eventPluginOrder.indexOf(pluginName);
    !(pluginIndex > -1) ? reactProdInvariant_1('96', pluginName) : void 0;
    if (EventPluginRegistry.plugins[pluginIndex]) {
      continue;
    }
    !pluginModule.extractEvents ? reactProdInvariant_1('97', pluginName) : void 0;
    EventPluginRegistry.plugins[pluginIndex] = pluginModule;
    var publishedEvents = pluginModule.eventTypes;
    for (var eventName in publishedEvents) {
      !publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName) ? reactProdInvariant_1('98', eventName, pluginName) : void 0;
    }
  }
}

/**
 * Publishes an event so that it can be dispatched by the supplied plugin.
 *
 * @param {object} dispatchConfig Dispatch configuration for the event.
 * @param {object} PluginModule Plugin publishing the event.
 * @return {boolean} True if the event was successfully published.
 * @private
 */
function publishEventForPlugin(dispatchConfig, pluginModule, eventName) {
  !!EventPluginRegistry.eventNameDispatchConfigs.hasOwnProperty(eventName) ? reactProdInvariant_1('99', eventName) : void 0;
  EventPluginRegistry.eventNameDispatchConfigs[eventName] = dispatchConfig;

  var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;
  if (phasedRegistrationNames) {
    for (var phaseName in phasedRegistrationNames) {
      if (phasedRegistrationNames.hasOwnProperty(phaseName)) {
        var phasedRegistrationName = phasedRegistrationNames[phaseName];
        publishRegistrationName(phasedRegistrationName, pluginModule, eventName);
      }
    }
    return true;
  } else if (dispatchConfig.registrationName) {
    publishRegistrationName(dispatchConfig.registrationName, pluginModule, eventName);
    return true;
  }
  return false;
}

/**
 * Publishes a registration name that is used to identify dispatched events.
 *
 * @param {string} registrationName Registration name to add.
 * @param {object} PluginModule Plugin publishing the event.
 * @private
 */
function publishRegistrationName(registrationName, pluginModule, eventName) {
  !!EventPluginRegistry.registrationNameModules[registrationName] ? reactProdInvariant_1('100', registrationName) : void 0;
  EventPluginRegistry.registrationNameModules[registrationName] = pluginModule;
  EventPluginRegistry.registrationNameDependencies[registrationName] = pluginModule.eventTypes[eventName].dependencies;

  
}

/**
 * Registers plugins so that they can extract and dispatch events.
 *
 * @see {EventPluginHub}
 */
var EventPluginRegistry = {
  /**
   * Ordered list of injected plugins.
   */
  plugins: [],

  /**
   * Mapping from event name to dispatch config
   */
  eventNameDispatchConfigs: {},

  /**
   * Mapping from registration name to plugin module
   */
  registrationNameModules: {},

  /**
   * Mapping from registration name to event name
   */
  registrationNameDependencies: {},

  /**
   * Mapping from lowercase registration names to the properly cased version,
   * used to warn in the case of missing event handlers. Available
   * only in false.
   * @type {Object}
   */
  possibleRegistrationNames: null,
  // Trust the developer to only use possibleRegistrationNames in false

  /**
   * Injects an ordering of plugins (by plugin name). This allows the ordering
   * to be decoupled from injection of the actual plugins so that ordering is
   * always deterministic regardless of packaging, on-the-fly injection, etc.
   *
   * @param {array} InjectedEventPluginOrder
   * @internal
   * @see {EventPluginHub.injection.injectEventPluginOrder}
   */
  injectEventPluginOrder: function (injectedEventPluginOrder) {
    !!eventPluginOrder ? reactProdInvariant_1('101') : void 0;
    // Clone the ordering so it cannot be dynamically mutated.
    eventPluginOrder = Array.prototype.slice.call(injectedEventPluginOrder);
    recomputePluginOrdering();
  },

  /**
   * Injects plugins to be used by `EventPluginHub`. The plugin names must be
   * in the ordering injected by `injectEventPluginOrder`.
   *
   * Plugins can be injected as part of page initialization or on-the-fly.
   *
   * @param {object} injectedNamesToPlugins Map from names to plugin modules.
   * @internal
   * @see {EventPluginHub.injection.injectEventPluginsByName}
   */
  injectEventPluginsByName: function (injectedNamesToPlugins) {
    var isOrderingDirty = false;
    for (var pluginName in injectedNamesToPlugins) {
      if (!injectedNamesToPlugins.hasOwnProperty(pluginName)) {
        continue;
      }
      var pluginModule = injectedNamesToPlugins[pluginName];
      if (!namesToPlugins.hasOwnProperty(pluginName) || namesToPlugins[pluginName] !== pluginModule) {
        !!namesToPlugins[pluginName] ? reactProdInvariant_1('102', pluginName) : void 0;
        namesToPlugins[pluginName] = pluginModule;
        isOrderingDirty = true;
      }
    }
    if (isOrderingDirty) {
      recomputePluginOrdering();
    }
  }
};

var EventPluginRegistry_1 = EventPluginRegistry;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 */

function makeEmptyFunction(arg) {
  return function () {
    return arg;
  };
}

/**
 * This function accepts and discards inputs; it has no side effects. This is
 * primarily useful idiomatically for overridable function endpoints which
 * always need to be callable, since JS lacks a null-call idiom ala Cocoa.
 */
var emptyFunction = function emptyFunction() {};

emptyFunction.thatReturns = makeEmptyFunction;
emptyFunction.thatReturnsFalse = makeEmptyFunction(false);
emptyFunction.thatReturnsTrue = makeEmptyFunction(true);
emptyFunction.thatReturnsNull = makeEmptyFunction(null);
emptyFunction.thatReturnsThis = function () {
  return this;
};
emptyFunction.thatReturnsArgument = function (arg) {
  return arg;
};

var emptyFunction_1 = emptyFunction;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @typechecks
 */



/**
 * Upstream version of event listener. Does not take into account specific
 * nature of platform.
 */
var EventListener = {
  /**
   * Listen to DOM events during the bubble phase.
   *
   * @param {DOMEventTarget} target DOM element to register listener on.
   * @param {string} eventType Event type, e.g. 'click' or 'mouseover'.
   * @param {function} callback Callback function.
   * @return {object} Object with a `remove` method.
   */
  listen: function listen(target, eventType, callback) {
    if (target.addEventListener) {
      target.addEventListener(eventType, callback, false);
      return {
        remove: function remove() {
          target.removeEventListener(eventType, callback, false);
        }
      };
    } else if (target.attachEvent) {
      target.attachEvent('on' + eventType, callback);
      return {
        remove: function remove() {
          target.detachEvent('on' + eventType, callback);
        }
      };
    }
  },

  /**
   * Listen to DOM events during the capture phase.
   *
   * @param {DOMEventTarget} target DOM element to register listener on.
   * @param {string} eventType Event type, e.g. 'click' or 'mouseover'.
   * @param {function} callback Callback function.
   * @return {object} Object with a `remove` method.
   */
  capture: function capture(target, eventType, callback) {
    if (target.addEventListener) {
      target.addEventListener(eventType, callback, true);
      return {
        remove: function remove() {
          target.removeEventListener(eventType, callback, true);
        }
      };
    } else {
      return {
        remove: emptyFunction_1
      };
    }
  },

  registerDefault: function registerDefault() {}
};

var EventListener_1 = EventListener;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactTypeOfWork
 * 
 */

var ReactTypeOfWork = {
  IndeterminateComponent: 0, // Before we know whether it is functional or class
  FunctionalComponent: 1,
  ClassComponent: 2,
  HostRoot: 3, // Root of a host tree. Could be nested inside another node.
  HostPortal: 4, // A subtree. Could be an entry point to a different renderer.
  HostComponent: 5,
  HostText: 6,
  CoroutineComponent: 7,
  CoroutineHandlerPhase: 8,
  YieldComponent: 9,
  Fragment: 10
};

var HostComponent = ReactTypeOfWork.HostComponent;
var HostText = ReactTypeOfWork.HostText;



var randomKey = Math.random().toString(36).slice(2);
var internalInstanceKey = '__reactInternalInstance$' + randomKey;
var internalEventHandlersKey = '__reactEventHandlers$' + randomKey;

function precacheFiberNode$1(hostInst, node) {
  node[internalInstanceKey] = hostInst;
}

/**
 * Given a DOM node, return the closest ReactDOMComponent or
 * ReactDOMTextComponent instance ancestor.
 */
function getClosestInstanceFromNode(node) {
  if (node[internalInstanceKey]) {
    return node[internalInstanceKey];
  }

  // Walk up the tree until we find an ancestor whose instance we have cached.
  var parents = [];
  while (!node[internalInstanceKey]) {
    parents.push(node);
    if (node.parentNode) {
      node = node.parentNode;
    } else {
      // Top of the tree. This node must not be part of a React tree (or is
      // unmounted, potentially).
      return null;
    }
  }

  var closest;
  var inst = node[internalInstanceKey];
  if (inst.tag === HostComponent || inst.tag === HostText) {
    // In Fiber, this will always be the deepest root.
    return inst;
  }
  for (; node && (inst = node[internalInstanceKey]); node = parents.pop()) {
    closest = inst;
  }

  return closest;
}

/**
 * Given a DOM node, return the ReactDOMComponent or ReactDOMTextComponent
 * instance, or null if the node was not rendered by this React.
 */
function getInstanceFromNode(node) {
  var inst = node[internalInstanceKey];
  if (inst) {
    if (inst.tag === HostComponent || inst.tag === HostText) {
      return inst;
    } else {
      return null;
    }
  }
  return null;
}

/**
 * Given a ReactDOMComponent or ReactDOMTextComponent, return the corresponding
 * DOM node.
 */
function getNodeFromInstance(inst) {
  if (inst.tag === HostComponent || inst.tag === HostText) {
    // In Fiber this, is just the state node right now. We assume it will be
    // a host component or host text.
    return inst.stateNode;
  }

  // Without this first invariant, passing a non-DOM-component triggers the next
  // invariant for a missing parent, which is super confusing.
  reactProdInvariant_1('33');
}

function getFiberCurrentPropsFromNode(node) {
  return node[internalEventHandlersKey] || null;
}

function updateFiberProps$1(node, props) {
  node[internalEventHandlersKey] = props;
}

var ReactDOMComponentTree = {
  getClosestInstanceFromNode: getClosestInstanceFromNode,
  getInstanceFromNode: getInstanceFromNode,
  getNodeFromInstance: getNodeFromInstance,
  precacheFiberNode: precacheFiberNode$1,
  getFiberCurrentPropsFromNode: getFiberCurrentPropsFromNode,
  updateFiberProps: updateFiberProps$1
};

var ReactDOMComponentTree_1 = ReactDOMComponentTree;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactInstanceMap
 */

/**
 * `ReactInstanceMap` maintains a mapping from a public facing stateful
 * instance (key) and the internal representation (value). This allows public
 * methods to accept the user facing instance as an argument and map them back
 * to internal methods.
 */

// TODO: Replace this with ES6: var ReactInstanceMap = new Map();

var ReactInstanceMap = {
  /**
   * This API should be called `delete` but we'd have to make sure to always
   * transform these to strings for IE support. When this transform is fully
   * supported we can rename it.
   */
  remove: function (key) {
    key._reactInternalFiber = undefined;
  },

  get: function (key) {
    return key._reactInternalFiber;
  },

  has: function (key) {
    return key._reactInternalFiber !== undefined;
  },

  set: function (key, value) {
    key._reactInternalFiber = value;
  }
};

var ReactInstanceMap_1 = ReactInstanceMap;

var ReactInternals$1 = require$$0.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;

var ReactGlobalSharedState = {
  ReactCurrentOwner: ReactInternals$1.ReactCurrentOwner
};

var ReactGlobalSharedState_1 = ReactGlobalSharedState;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule getComponentName
 * 
 */

function getComponentName(fiber) {
  var type = fiber.type;

  if (typeof type === 'string') {
    return type;
  }
  if (typeof type === 'function') {
    return type.displayName || type.name;
  }
  return null;
}

var getComponentName_1 = getComponentName;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactTypeOfSideEffect
 * 
 */

var ReactTypeOfSideEffect = {
  // Don't change these two values:
  NoEffect: 0, //           0b00000000
  PerformedWork: 1, //      0b00000001
  // You can change the rest (and add more).
  Placement: 2, //          0b00000010
  Update: 4, //             0b00000100
  PlacementAndUpdate: 6, // 0b00000110
  Deletion: 8, //           0b00001000
  ContentReset: 16, //      0b00010000
  Callback: 32, //          0b00100000
  Err: 64, //               0b01000000
  Ref: 128 };

var HostComponent$1 = ReactTypeOfWork.HostComponent;
var HostRoot$1 = ReactTypeOfWork.HostRoot;
var HostPortal = ReactTypeOfWork.HostPortal;
var HostText$1 = ReactTypeOfWork.HostText;

var NoEffect = ReactTypeOfSideEffect.NoEffect;
var Placement = ReactTypeOfSideEffect.Placement;

var MOUNTING = 1;
var MOUNTED = 2;
var UNMOUNTED = 3;

function isFiberMountedImpl(fiber) {
  var node = fiber;
  if (!fiber.alternate) {
    // If there is no alternate, this might be a new tree that isn't inserted
    // yet. If it is, then it will have a pending insertion effect on it.
    if ((node.effectTag & Placement) !== NoEffect) {
      return MOUNTING;
    }
    while (node['return']) {
      node = node['return'];
      if ((node.effectTag & Placement) !== NoEffect) {
        return MOUNTING;
      }
    }
  } else {
    while (node['return']) {
      node = node['return'];
    }
  }
  if (node.tag === HostRoot$1) {
    // TODO: Check if this was a nested HostRoot when used with
    // renderContainerIntoSubtree.
    return MOUNTED;
  }
  // If we didn't hit the root, that means that we're in an disconnected tree
  // that has been unmounted.
  return UNMOUNTED;
}
var isFiberMounted = function (fiber) {
  return isFiberMountedImpl(fiber) === MOUNTED;
};

var isMounted = function (component) {
  var fiber = ReactInstanceMap_1.get(component);
  if (!fiber) {
    return false;
  }
  return isFiberMountedImpl(fiber) === MOUNTED;
};

function assertIsMounted(fiber) {
  !(isFiberMountedImpl(fiber) === MOUNTED) ? reactProdInvariant_1('188') : void 0;
}

function findCurrentFiberUsingSlowPath(fiber) {
  var alternate = fiber.alternate;
  if (!alternate) {
    // If there is no alternate, then we only need to check if it is mounted.
    var state = isFiberMountedImpl(fiber);
    !(state !== UNMOUNTED) ? reactProdInvariant_1('188') : void 0;
    if (state === MOUNTING) {
      return null;
    }
    return fiber;
  }
  // If we have two possible branches, we'll walk backwards up to the root
  // to see what path the root points to. On the way we may hit one of the
  // special cases and we'll deal with them.
  var a = fiber;
  var b = alternate;
  while (true) {
    var parentA = a['return'];
    var parentB = parentA ? parentA.alternate : null;
    if (!parentA || !parentB) {
      // We're at the root.
      break;
    }

    // If both copies of the parent fiber point to the same child, we can
    // assume that the child is current. This happens when we bailout on low
    // priority: the bailed out fiber's child reuses the current child.
    if (parentA.child === parentB.child) {
      var child = parentA.child;
      while (child) {
        if (child === a) {
          // We've determined that A is the current branch.
          assertIsMounted(parentA);
          return fiber;
        }
        if (child === b) {
          // We've determined that B is the current branch.
          assertIsMounted(parentA);
          return alternate;
        }
        child = child.sibling;
      }
      // We should never have an alternate for any mounting node. So the only
      // way this could possibly happen is if this was unmounted, if at all.
      reactProdInvariant_1('188');
    }

    if (a['return'] !== b['return']) {
      // The return pointer of A and the return pointer of B point to different
      // fibers. We assume that return pointers never criss-cross, so A must
      // belong to the child set of A.return, and B must belong to the child
      // set of B.return.
      a = parentA;
      b = parentB;
    } else {
      // The return pointers point to the same fiber. We'll have to use the
      // default, slow path: scan the child sets of each parent alternate to see
      // which child belongs to which set.
      //
      // Search parent A's child set
      var didFindChild = false;
      var _child = parentA.child;
      while (_child) {
        if (_child === a) {
          didFindChild = true;
          a = parentA;
          b = parentB;
          break;
        }
        if (_child === b) {
          didFindChild = true;
          b = parentA;
          a = parentB;
          break;
        }
        _child = _child.sibling;
      }
      if (!didFindChild) {
        // Search parent B's child set
        _child = parentB.child;
        while (_child) {
          if (_child === a) {
            didFindChild = true;
            a = parentB;
            b = parentA;
            break;
          }
          if (_child === b) {
            didFindChild = true;
            b = parentB;
            a = parentA;
            break;
          }
          _child = _child.sibling;
        }
        !didFindChild ? reactProdInvariant_1('189') : void 0;
      }
    }

    !(a.alternate === b) ? reactProdInvariant_1('190') : void 0;
  }
  // If the root is not a host container, we're in a disconnected tree. I.e.
  // unmounted.
  !(a.tag === HostRoot$1) ? reactProdInvariant_1('188') : void 0;
  if (a.stateNode.current === a) {
    // We've determined that A is the current branch.
    return fiber;
  }
  // Otherwise B has to be current branch.
  return alternate;
}
var findCurrentFiberUsingSlowPath_1 = findCurrentFiberUsingSlowPath;

var findCurrentHostFiber = function (parent) {
  var currentParent = findCurrentFiberUsingSlowPath(parent);
  if (!currentParent) {
    return null;
  }

  // Next we'll drill down this component to find the first HostComponent/Text.
  var node = currentParent;
  while (true) {
    if (node.tag === HostComponent$1 || node.tag === HostText$1) {
      return node;
    } else if (node.child) {
      node.child['return'] = node;
      node = node.child;
      continue;
    }
    if (node === currentParent) {
      return null;
    }
    while (!node.sibling) {
      if (!node['return'] || node['return'] === currentParent) {
        return null;
      }
      node = node['return'];
    }
    node.sibling['return'] = node['return'];
    node = node.sibling;
  }
  // Flow needs the return null here, but ESLint complains about it.
  // eslint-disable-next-line no-unreachable
  return null;
};

var findCurrentHostFiberWithNoPortals = function (parent) {
  var currentParent = findCurrentFiberUsingSlowPath(parent);
  if (!currentParent) {
    return null;
  }

  // Next we'll drill down this component to find the first HostComponent/Text.
  var node = currentParent;
  while (true) {
    if (node.tag === HostComponent$1 || node.tag === HostText$1) {
      return node;
    } else if (node.child && node.tag !== HostPortal) {
      node.child['return'] = node;
      node = node.child;
      continue;
    }
    if (node === currentParent) {
      return null;
    }
    while (!node.sibling) {
      if (!node['return'] || node['return'] === currentParent) {
        return null;
      }
      node = node['return'];
    }
    node.sibling['return'] = node['return'];
    node = node.sibling;
  }
  // Flow needs the return null here, but ESLint complains about it.
  // eslint-disable-next-line no-unreachable
  return null;
};

var ReactFiberTreeReflection = {
	isFiberMounted: isFiberMounted,
	isMounted: isMounted,
	findCurrentFiberUsingSlowPath: findCurrentFiberUsingSlowPath_1,
	findCurrentHostFiber: findCurrentHostFiber,
	findCurrentHostFiberWithNoPortals: findCurrentHostFiberWithNoPortals
};

var ReactErrorUtils = {
  // Used by Fiber to simulate a try-catch.
  _caughtError: null,
  _hasCaughtError: false,

  // Used by event system to capture/rethrow the first error.
  _rethrowError: null,
  _hasRethrowError: false,

  injection: {
    injectErrorUtils: function (injectedErrorUtils) {
      !(typeof injectedErrorUtils.invokeGuardedCallback === 'function') ? reactProdInvariant_1('197') : void 0;
      invokeGuardedCallback = injectedErrorUtils.invokeGuardedCallback;
    }
  },

  /**
   * Call a function while guarding against errors that happens within it.
   * Returns an error if it throws, otherwise null.
   *
   * In production, this is implemented using a try-catch. The reason we don't
   * use a try-catch directly is so that we can swap out a different
   * implementation in DEV mode.
   *
   * @param {String} name of the guard to use for logging or debugging
   * @param {Function} func The function to invoke
   * @param {*} context The context to use when calling the function
   * @param {...*} args Arguments for function
   */
  invokeGuardedCallback: function (name, func, context, a, b, c, d, e, f) {
    invokeGuardedCallback.apply(ReactErrorUtils, arguments);
  },

  /**
   * Same as invokeGuardedCallback, but instead of returning an error, it stores
   * it in a global so it can be rethrown by `rethrowCaughtError` later.
   * TODO: See if _caughtError and _rethrowError can be unified.
   *
   * @param {String} name of the guard to use for logging or debugging
   * @param {Function} func The function to invoke
   * @param {*} context The context to use when calling the function
   * @param {...*} args Arguments for function
   */
  invokeGuardedCallbackAndCatchFirstError: function (name, func, context, a, b, c, d, e, f) {
    ReactErrorUtils.invokeGuardedCallback.apply(this, arguments);
    if (ReactErrorUtils.hasCaughtError()) {
      var error = ReactErrorUtils.clearCaughtError();
      if (!ReactErrorUtils._hasRethrowError) {
        ReactErrorUtils._hasRethrowError = true;
        ReactErrorUtils._rethrowError = error;
      }
    }
  },

  /**
   * During execution of guarded functions we will capture the first error which
   * we will rethrow to be handled by the top level error handler.
   */
  rethrowCaughtError: function () {
    return rethrowCaughtError.apply(ReactErrorUtils, arguments);
  },

  hasCaughtError: function () {
    return ReactErrorUtils._hasCaughtError;
  },

  clearCaughtError: function () {
    if (ReactErrorUtils._hasCaughtError) {
      var error = ReactErrorUtils._caughtError;
      ReactErrorUtils._caughtError = null;
      ReactErrorUtils._hasCaughtError = false;
      return error;
    } else {
      reactProdInvariant_1('198');
    }
  }
};

var invokeGuardedCallback = function (name, func, context, a, b, c, d, e, f) {
  ReactErrorUtils._hasCaughtError = false;
  ReactErrorUtils._caughtError = null;
  var funcArgs = Array.prototype.slice.call(arguments, 3);
  try {
    func.apply(context, funcArgs);
  } catch (error) {
    ReactErrorUtils._caughtError = error;
    ReactErrorUtils._hasCaughtError = true;
  }
};

var rethrowCaughtError = function () {
  if (ReactErrorUtils._hasRethrowError) {
    var error = ReactErrorUtils._rethrowError;
    ReactErrorUtils._rethrowError = null;
    ReactErrorUtils._hasRethrowError = false;
    throw error;
  }
};

var ReactErrorUtils_1 = ReactErrorUtils;

/**
 * Injected dependencies:
 */

/**
 * - `ComponentTree`: [required] Module that can convert between React instances
 *   and actual node references.
 */
var ComponentTree;
var injection = {
  injectComponentTree: function (Injected) {
    ComponentTree = Injected;
    
  }
};

function isEndish(topLevelType) {
  return topLevelType === 'topMouseUp' || topLevelType === 'topTouchEnd' || topLevelType === 'topTouchCancel';
}

function isMoveish(topLevelType) {
  return topLevelType === 'topMouseMove' || topLevelType === 'topTouchMove';
}
function isStartish(topLevelType) {
  return topLevelType === 'topMouseDown' || topLevelType === 'topTouchStart';
}

/**
 * Dispatch the event to the listener.
 * @param {SyntheticEvent} event SyntheticEvent to handle
 * @param {boolean} simulated If the event is simulated (changes exn behavior)
 * @param {function} listener Application-level callback
 * @param {*} inst Internal component instance
 */
function executeDispatch(event, simulated, listener, inst) {
  var type = event.type || 'unknown-event';
  event.currentTarget = EventPluginUtils.getNodeFromInstance(inst);
  ReactErrorUtils_1.invokeGuardedCallbackAndCatchFirstError(type, listener, undefined, event);
  event.currentTarget = null;
}

/**
 * Standard/simple iteration through an event's collected dispatches.
 */
function executeDispatchesInOrder(event, simulated) {
  var dispatchListeners = event._dispatchListeners;
  var dispatchInstances = event._dispatchInstances;
  if (Array.isArray(dispatchListeners)) {
    for (var i = 0; i < dispatchListeners.length; i++) {
      if (event.isPropagationStopped()) {
        break;
      }
      // Listeners and Instances are two parallel arrays that are always in sync.
      executeDispatch(event, simulated, dispatchListeners[i], dispatchInstances[i]);
    }
  } else if (dispatchListeners) {
    executeDispatch(event, simulated, dispatchListeners, dispatchInstances);
  }
  event._dispatchListeners = null;
  event._dispatchInstances = null;
}

/**
 * Standard/simple iteration through an event's collected dispatches, but stops
 * at the first dispatch execution returning true, and returns that id.
 *
 * @return {?string} id of the first dispatch execution who's listener returns
 * true, or null if no listener returned true.
 */
function executeDispatchesInOrderStopAtTrueImpl(event) {
  var dispatchListeners = event._dispatchListeners;
  var dispatchInstances = event._dispatchInstances;
  if (Array.isArray(dispatchListeners)) {
    for (var i = 0; i < dispatchListeners.length; i++) {
      if (event.isPropagationStopped()) {
        break;
      }
      // Listeners and Instances are two parallel arrays that are always in sync.
      if (dispatchListeners[i](event, dispatchInstances[i])) {
        return dispatchInstances[i];
      }
    }
  } else if (dispatchListeners) {
    if (dispatchListeners(event, dispatchInstances)) {
      return dispatchInstances;
    }
  }
  return null;
}

/**
 * @see executeDispatchesInOrderStopAtTrueImpl
 */
function executeDispatchesInOrderStopAtTrue(event) {
  var ret = executeDispatchesInOrderStopAtTrueImpl(event);
  event._dispatchInstances = null;
  event._dispatchListeners = null;
  return ret;
}

/**
 * Execution of a "direct" dispatch - there must be at most one dispatch
 * accumulated on the event or it is considered an error. It doesn't really make
 * sense for an event with multiple dispatches (bubbled) to keep track of the
 * return values at each dispatch execution, but it does tend to make sense when
 * dealing with "direct" dispatches.
 *
 * @return {*} The return value of executing the single dispatch.
 */
function executeDirectDispatch(event) {
  var dispatchListener = event._dispatchListeners;
  var dispatchInstance = event._dispatchInstances;
  !!Array.isArray(dispatchListener) ? reactProdInvariant_1('103') : void 0;
  event.currentTarget = dispatchListener ? EventPluginUtils.getNodeFromInstance(dispatchInstance) : null;
  var res = dispatchListener ? dispatchListener(event) : null;
  event.currentTarget = null;
  event._dispatchListeners = null;
  event._dispatchInstances = null;
  return res;
}

/**
 * @param {SyntheticEvent} event
 * @return {boolean} True iff number of dispatches accumulated is greater than 0.
 */
function hasDispatches(event) {
  return !!event._dispatchListeners;
}

/**
 * General utilities that are useful in creating custom Event Plugins.
 */
var EventPluginUtils = {
  isEndish: isEndish,
  isMoveish: isMoveish,
  isStartish: isStartish,

  executeDirectDispatch: executeDirectDispatch,
  executeDispatchesInOrder: executeDispatchesInOrder,
  executeDispatchesInOrderStopAtTrue: executeDispatchesInOrderStopAtTrue,
  hasDispatches: hasDispatches,

  getFiberCurrentPropsFromNode: function (node) {
    return ComponentTree.getFiberCurrentPropsFromNode(node);
  },
  getInstanceFromNode: function (node) {
    return ComponentTree.getInstanceFromNode(node);
  },
  getNodeFromInstance: function (node) {
    return ComponentTree.getNodeFromInstance(node);
  },

  injection: injection
};

var EventPluginUtils_1 = EventPluginUtils;

// Use to restore controlled state after a change event has fired.

var fiberHostComponent = null;

var ReactControlledComponentInjection = {
  injectFiberControlledHostComponent: function (hostComponentImpl) {
    // The fiber implementation doesn't use dynamic dispatch so we need to
    // inject the implementation.
    fiberHostComponent = hostComponentImpl;
  }
};

var restoreTarget = null;
var restoreQueue = null;

function restoreStateOfTarget(target) {
  // We perform this translation at the end of the event loop so that we
  // always receive the correct fiber here
  var internalInstance = EventPluginUtils_1.getInstanceFromNode(target);
  if (!internalInstance) {
    // Unmounted
    return;
  }
  !(fiberHostComponent && typeof fiberHostComponent.restoreControlledState === 'function') ? reactProdInvariant_1('194') : void 0;
  var props = EventPluginUtils_1.getFiberCurrentPropsFromNode(internalInstance.stateNode);
  fiberHostComponent.restoreControlledState(internalInstance.stateNode, internalInstance.type, props);
}

var ReactControlledComponent = {
  injection: ReactControlledComponentInjection,

  enqueueStateRestore: function (target) {
    if (restoreTarget) {
      if (restoreQueue) {
        restoreQueue.push(target);
      } else {
        restoreQueue = [target];
      }
    } else {
      restoreTarget = target;
    }
  },
  restoreStateIfNeeded: function () {
    if (!restoreTarget) {
      return;
    }
    var target = restoreTarget;
    var queuedTargets = restoreQueue;
    restoreTarget = null;
    restoreQueue = null;

    restoreStateOfTarget(target);
    if (queuedTargets) {
      for (var i = 0; i < queuedTargets.length; i++) {
        restoreStateOfTarget(queuedTargets[i]);
      }
    }
  }
};

var ReactControlledComponent_1 = ReactControlledComponent;

// Used as a way to call batchedUpdates when we don't have a reference to
// the renderer. Such as when we're dispatching events or if third party
// libraries need to call batchedUpdates. Eventually, this API will go away when
// everything is batched by default. We'll then have a similar API to opt-out of
// scheduled work and instead do synchronous work.

// Defaults
var fiberBatchedUpdates = function (fn, bookkeeping) {
  return fn(bookkeeping);
};

function batchedUpdates(fn, bookkeeping) {
  // If we have Fiber loaded, we need to wrap this in a batching call so that
  // Fiber can apply its default priority for this call.
  return fiberBatchedUpdates(fn, bookkeeping);
}

var isNestingBatched = false;
function batchedUpdatesWithControlledComponents(fn, bookkeeping) {
  if (isNestingBatched) {
    // If we are currently inside another batch, we need to wait until it
    // fully completes before restoring state. Therefore, we add the target to
    // a queue of work.
    return batchedUpdates(fn, bookkeeping);
  }
  isNestingBatched = true;
  try {
    return batchedUpdates(fn, bookkeeping);
  } finally {
    // Here we wait until all updates have propagated, which is important
    // when using controlled components within layers:
    // https://github.com/facebook/react/issues/1698
    // Then we restore state of any controlled component.
    isNestingBatched = false;
    ReactControlledComponent_1.restoreStateIfNeeded();
  }
}

var ReactGenericBatchingInjection = {
  injectFiberBatchedUpdates: function (_batchedUpdates) {
    fiberBatchedUpdates = _batchedUpdates;
  }
};

var ReactGenericBatching = {
  batchedUpdates: batchedUpdatesWithControlledComponents,
  injection: ReactGenericBatchingInjection
};

var ReactGenericBatching_1 = ReactGenericBatching;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule HTMLNodeType
 */

/**
 * HTML nodeType values that represent the type of the node
 */

var HTMLNodeType = {
  ELEMENT_NODE: 1,
  TEXT_NODE: 3,
  COMMENT_NODE: 8,
  DOCUMENT_NODE: 9,
  DOCUMENT_FRAGMENT_NODE: 11
};

var HTMLNodeType_1 = HTMLNodeType;

var TEXT_NODE$1 = HTMLNodeType_1.TEXT_NODE;

/**
 * Gets the target node from a native browser event by accounting for
 * inconsistencies in browser DOM APIs.
 *
 * @param {object} nativeEvent Native browser event.
 * @return {DOMEventTarget} Target node.
 */


function getEventTarget(nativeEvent) {
  var target = nativeEvent.target || nativeEvent.srcElement || window;

  // Normalize SVG <use> element events #4963
  if (target.correspondingUseElement) {
    target = target.correspondingUseElement;
  }

  // Safari may fire events on text nodes (Node.TEXT_NODE is 3).
  // @see http://www.quirksmode.org/js/events_properties.html
  return target.nodeType === TEXT_NODE$1 ? target.parentNode : target;
}

var getEventTarget_1 = getEventTarget;

var HostRoot = ReactTypeOfWork.HostRoot;


var CALLBACK_BOOKKEEPING_POOL_SIZE = 10;
var callbackBookkeepingPool = [];

/**
 * Find the deepest React component completely containing the root of the
 * passed-in instance (for use when entire React trees are nested within each
 * other). If React trees are not nested, returns null.
 */
function findRootContainerNode(inst) {
  // TODO: It may be a good idea to cache this to prevent unnecessary DOM
  // traversal, but caching is difficult to do correctly without using a
  // mutation observer to listen for all DOM changes.
  while (inst['return']) {
    inst = inst['return'];
  }
  if (inst.tag !== HostRoot) {
    // This can happen if we're in a detached tree.
    return null;
  }
  return inst.stateNode.containerInfo;
}

// Used to store ancestor hierarchy in top level callback
function getTopLevelCallbackBookKeeping(topLevelType, nativeEvent, targetInst) {
  if (callbackBookkeepingPool.length) {
    var instance = callbackBookkeepingPool.pop();
    instance.topLevelType = topLevelType;
    instance.nativeEvent = nativeEvent;
    instance.targetInst = targetInst;
    return instance;
  }
  return {
    topLevelType: topLevelType,
    nativeEvent: nativeEvent,
    targetInst: targetInst,
    ancestors: []
  };
}

function releaseTopLevelCallbackBookKeeping(instance) {
  instance.topLevelType = null;
  instance.nativeEvent = null;
  instance.targetInst = null;
  instance.ancestors.length = 0;
  if (callbackBookkeepingPool.length < CALLBACK_BOOKKEEPING_POOL_SIZE) {
    callbackBookkeepingPool.push(instance);
  }
}

function handleTopLevelImpl(bookKeeping) {
  var targetInst = bookKeeping.targetInst;

  // Loop through the hierarchy, in case there's any nested components.
  // It's important that we build the array of ancestors before calling any
  // event handlers, because event handlers can modify the DOM, leading to
  // inconsistencies with ReactMount's node cache. See #1105.
  var ancestor = targetInst;
  do {
    if (!ancestor) {
      bookKeeping.ancestors.push(ancestor);
      break;
    }
    var root = findRootContainerNode(ancestor);
    if (!root) {
      break;
    }
    bookKeeping.ancestors.push(ancestor);
    ancestor = ReactDOMComponentTree_1.getClosestInstanceFromNode(root);
  } while (ancestor);

  for (var i = 0; i < bookKeeping.ancestors.length; i++) {
    targetInst = bookKeeping.ancestors[i];
    ReactDOMEventListener._handleTopLevel(bookKeeping.topLevelType, targetInst, bookKeeping.nativeEvent, getEventTarget_1(bookKeeping.nativeEvent));
  }
}

var ReactDOMEventListener = {
  _enabled: true,
  _handleTopLevel: null,

  setHandleTopLevel: function (handleTopLevel) {
    ReactDOMEventListener._handleTopLevel = handleTopLevel;
  },

  setEnabled: function (enabled) {
    ReactDOMEventListener._enabled = !!enabled;
  },

  isEnabled: function () {
    return ReactDOMEventListener._enabled;
  },

  /**
   * Traps top-level events by using event bubbling.
   *
   * @param {string} topLevelType Record from `BrowserEventConstants`.
   * @param {string} handlerBaseName Event name (e.g. "click").
   * @param {object} element Element on which to attach listener.
   * @return {?object} An object with a remove function which will forcefully
   *                  remove the listener.
   * @internal
   */
  trapBubbledEvent: function (topLevelType, handlerBaseName, element) {
    if (!element) {
      return null;
    }
    return EventListener_1.listen(element, handlerBaseName, ReactDOMEventListener.dispatchEvent.bind(null, topLevelType));
  },

  /**
   * Traps a top-level event by using event capturing.
   *
   * @param {string} topLevelType Record from `BrowserEventConstants`.
   * @param {string} handlerBaseName Event name (e.g. "click").
   * @param {object} element Element on which to attach listener.
   * @return {?object} An object with a remove function which will forcefully
   *                  remove the listener.
   * @internal
   */
  trapCapturedEvent: function (topLevelType, handlerBaseName, element) {
    if (!element) {
      return null;
    }
    return EventListener_1.capture(element, handlerBaseName, ReactDOMEventListener.dispatchEvent.bind(null, topLevelType));
  },

  dispatchEvent: function (topLevelType, nativeEvent) {
    if (!ReactDOMEventListener._enabled) {
      return;
    }

    var nativeEventTarget = getEventTarget_1(nativeEvent);
    var targetInst = ReactDOMComponentTree_1.getClosestInstanceFromNode(nativeEventTarget);
    if (targetInst !== null && typeof targetInst.tag === 'number' && !ReactFiberTreeReflection.isFiberMounted(targetInst)) {
      // If we get an event (ex: img onload) before committing that
      // component's mount, ignore it for now (that is, treat it as if it was an
      // event on a non-React tree). We might also consider queueing events and
      // dispatching them after the mount.
      targetInst = null;
    }

    var bookKeeping = getTopLevelCallbackBookKeeping(topLevelType, nativeEvent, targetInst);

    try {
      // Event queue being processed in the same cycle allows
      // `preventDefault`.
      ReactGenericBatching_1.batchedUpdates(handleTopLevelImpl, bookKeeping);
    } finally {
      releaseTopLevelCallbackBookKeeping(bookKeeping);
    }
  }
};

var ReactDOMEventListener_1 = ReactDOMEventListener;

/**
 * Accumulates items that must not be null or undefined into the first one. This
 * is used to conserve memory by avoiding array allocations, and thus sacrifices
 * API cleanness. Since `current` can be null before being passed in and not
 * null after this function, make sure to assign it back to `current`:
 *
 * `a = accumulateInto(a, b);`
 *
 * This API should be sparingly used. Try `accumulate` for something cleaner.
 *
 * @return {*|array<*>} An accumulation of items.
 */

function accumulateInto(current, next) {
  !(next != null) ? reactProdInvariant_1('30') : void 0;

  if (current == null) {
    return next;
  }

  // Both are not empty. Warning: Never call x.concat(y) when you are not
  // certain that x is an Array (x could be a string with concat method).
  if (Array.isArray(current)) {
    if (Array.isArray(next)) {
      current.push.apply(current, next);
      return current;
    }
    current.push(next);
    return current;
  }

  if (Array.isArray(next)) {
    // A bit too dangerous to mutate `next`.
    return [current].concat(next);
  }

  return [current, next];
}

var accumulateInto_1 = accumulateInto;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule forEachAccumulated
 * 
 */

/**
 * @param {array} arr an "accumulation" of items which is either an Array or
 * a single item. Useful when paired with the `accumulate` module. This is a
 * simple utility that allows us to reason about a collection of items, but
 * handling the case when there is exactly one item (and we do not need to
 * allocate an array).
 * @param {function} cb Callback invoked with each element or a collection.
 * @param {?} [scope] Scope used as `this` in a callback.
 */

function forEachAccumulated(arr, cb, scope) {
  if (Array.isArray(arr)) {
    arr.forEach(cb, scope);
  } else if (arr) {
    cb.call(scope, arr);
  }
}

var forEachAccumulated_1 = forEachAccumulated;

/**
 * Internal queue of events that have accumulated their dispatches and are
 * waiting to have their dispatches executed.
 */
var eventQueue = null;

/**
 * Dispatches an event and releases it back into the pool, unless persistent.
 *
 * @param {?object} event Synthetic event to be dispatched.
 * @param {boolean} simulated If the event is simulated (changes exn behavior)
 * @private
 */
var executeDispatchesAndRelease = function (event, simulated) {
  if (event) {
    EventPluginUtils_1.executeDispatchesInOrder(event, simulated);

    if (!event.isPersistent()) {
      event.constructor.release(event);
    }
  }
};
var executeDispatchesAndReleaseSimulated = function (e) {
  return executeDispatchesAndRelease(e, true);
};
var executeDispatchesAndReleaseTopLevel = function (e) {
  return executeDispatchesAndRelease(e, false);
};

function isInteractive(tag) {
  return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';
}

function shouldPreventMouseEvent(name, type, props) {
  switch (name) {
    case 'onClick':
    case 'onClickCapture':
    case 'onDoubleClick':
    case 'onDoubleClickCapture':
    case 'onMouseDown':
    case 'onMouseDownCapture':
    case 'onMouseMove':
    case 'onMouseMoveCapture':
    case 'onMouseUp':
    case 'onMouseUpCapture':
      return !!(props.disabled && isInteractive(type));
    default:
      return false;
  }
}

/**
 * This is a unified interface for event plugins to be installed and configured.
 *
 * Event plugins can implement the following properties:
 *
 *   `extractEvents` {function(string, DOMEventTarget, string, object): *}
 *     Required. When a top-level event is fired, this method is expected to
 *     extract synthetic events that will in turn be queued and dispatched.
 *
 *   `eventTypes` {object}
 *     Optional, plugins that fire events must publish a mapping of registration
 *     names that are used to register listeners. Values of this mapping must
 *     be objects that contain `registrationName` or `phasedRegistrationNames`.
 *
 *   `executeDispatch` {function(object, function, string)}
 *     Optional, allows plugins to override how an event gets dispatched. By
 *     default, the listener is simply invoked.
 *
 * Each plugin that is injected into `EventsPluginHub` is immediately operable.
 *
 * @public
 */
var EventPluginHub = {
  /**
   * Methods for injecting dependencies.
   */
  injection: {
    /**
     * @param {array} InjectedEventPluginOrder
     * @public
     */
    injectEventPluginOrder: EventPluginRegistry_1.injectEventPluginOrder,

    /**
     * @param {object} injectedNamesToPlugins Map from names to plugin modules.
     */
    injectEventPluginsByName: EventPluginRegistry_1.injectEventPluginsByName
  },

  /**
   * @param {object} inst The instance, which is the source of events.
   * @param {string} registrationName Name of listener (e.g. `onClick`).
   * @return {?function} The stored callback.
   */
  getListener: function (inst, registrationName) {
    var listener;

    // TODO: shouldPreventMouseEvent is DOM-specific and definitely should not
    // live here; needs to be moved to a better place soon
    var stateNode = inst.stateNode;
    if (!stateNode) {
      // Work in progress (ex: onload events in incremental mode).
      return null;
    }
    var props = EventPluginUtils_1.getFiberCurrentPropsFromNode(stateNode);
    if (!props) {
      // Work in progress.
      return null;
    }
    listener = props[registrationName];
    if (shouldPreventMouseEvent(registrationName, inst.type, props)) {
      return null;
    }
    !(!listener || typeof listener === 'function') ? reactProdInvariant_1('231', registrationName, typeof listener) : void 0;
    return listener;
  },

  /**
   * Allows registered plugins an opportunity to extract events from top-level
   * native browser events.
   *
   * @return {*} An accumulation of synthetic events.
   * @internal
   */
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var events;
    var plugins = EventPluginRegistry_1.plugins;
    for (var i = 0; i < plugins.length; i++) {
      // Not every plugin in the ordering may be loaded at runtime.
      var possiblePlugin = plugins[i];
      if (possiblePlugin) {
        var extractedEvents = possiblePlugin.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);
        if (extractedEvents) {
          events = accumulateInto_1(events, extractedEvents);
        }
      }
    }
    return events;
  },

  /**
   * Enqueues a synthetic event that should be dispatched when
   * `processEventQueue` is invoked.
   *
   * @param {*} events An accumulation of synthetic events.
   * @internal
   */
  enqueueEvents: function (events) {
    if (events) {
      eventQueue = accumulateInto_1(eventQueue, events);
    }
  },

  /**
   * Dispatches all synthetic events on the event queue.
   *
   * @internal
   */
  processEventQueue: function (simulated) {
    // Set `eventQueue` to null before processing it so that we can tell if more
    // events get enqueued while processing.
    var processingEventQueue = eventQueue;
    eventQueue = null;
    if (simulated) {
      forEachAccumulated_1(processingEventQueue, executeDispatchesAndReleaseSimulated);
    } else {
      forEachAccumulated_1(processingEventQueue, executeDispatchesAndReleaseTopLevel);
    }
    !!eventQueue ? reactProdInvariant_1('95') : void 0;
    // This would be a good time to rethrow if any of the event handlers threw.
    ReactErrorUtils_1.rethrowCaughtError();
  }
};

var EventPluginHub_1 = EventPluginHub;

function runEventQueueInBatch(events) {
  EventPluginHub_1.enqueueEvents(events);
  EventPluginHub_1.processEventQueue(false);
}

var ReactEventEmitterMixin = {
  /**
   * Streams a fired top-level event to `EventPluginHub` where plugins have the
   * opportunity to create `ReactEvent`s to be dispatched.
   */
  handleTopLevel: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var events = EventPluginHub_1.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);
    runEventQueueInBatch(events);
  }
};

var ReactEventEmitterMixin_1 = ReactEventEmitterMixin;

var useHasFeature;
if (ExecutionEnvironment_1.canUseDOM) {
  useHasFeature = document.implementation && document.implementation.hasFeature &&
  // always returns true in newer browsers as per the standard.
  // @see http://dom.spec.whatwg.org/#dom-domimplementation-hasfeature
  document.implementation.hasFeature('', '') !== true;
}

/**
 * Checks if an event is supported in the current execution environment.
 *
 * NOTE: This will not work correctly for non-generic events such as `change`,
 * `reset`, `load`, `error`, and `select`.
 *
 * Borrows from Modernizr.
 *
 * @param {string} eventNameSuffix Event name, e.g. "click".
 * @param {?boolean} capture Check if the capture phase is supported.
 * @return {boolean} True if the event is supported.
 * @internal
 * @license Modernizr 3.0.0pre (Custom Build) | MIT
 */
function isEventSupported(eventNameSuffix, capture) {
  if (!ExecutionEnvironment_1.canUseDOM || capture && !('addEventListener' in document)) {
    return false;
  }

  var eventName = 'on' + eventNameSuffix;
  var isSupported = eventName in document;

  if (!isSupported) {
    var element = document.createElement('div');
    element.setAttribute(eventName, 'return;');
    isSupported = typeof element[eventName] === 'function';
  }

  if (!isSupported && useHasFeature && eventNameSuffix === 'wheel') {
    // This is the only way to test support for the `wheel` event in IE9+.
    isSupported = document.implementation.hasFeature('Events.wheel', '3.0');
  }

  return isSupported;
}

var isEventSupported_1 = isEventSupported;

/**
 * Generate a mapping of standard vendor prefixes using the defined style property and event name.
 *
 * @param {string} styleProp
 * @param {string} eventName
 * @returns {object}
 */
function makePrefixMap(styleProp, eventName) {
  var prefixes = {};

  prefixes[styleProp.toLowerCase()] = eventName.toLowerCase();
  prefixes['Webkit' + styleProp] = 'webkit' + eventName;
  prefixes['Moz' + styleProp] = 'moz' + eventName;
  prefixes['ms' + styleProp] = 'MS' + eventName;
  prefixes['O' + styleProp] = 'o' + eventName.toLowerCase();

  return prefixes;
}

/**
 * A list of event names to a configurable list of vendor prefixes.
 */
var vendorPrefixes = {
  animationend: makePrefixMap('Animation', 'AnimationEnd'),
  animationiteration: makePrefixMap('Animation', 'AnimationIteration'),
  animationstart: makePrefixMap('Animation', 'AnimationStart'),
  transitionend: makePrefixMap('Transition', 'TransitionEnd')
};

/**
 * Event names that have already been detected and prefixed (if applicable).
 */
var prefixedEventNames = {};

/**
 * Element to check for prefixes on.
 */
var style = {};

/**
 * Bootstrap if a DOM exists.
 */
if (ExecutionEnvironment_1.canUseDOM) {
  style = document.createElement('div').style;

  // On some platforms, in particular some releases of Android 4.x,
  // the un-prefixed "animation" and "transition" properties are defined on the
  // style object but the events that fire will still be prefixed, so we need
  // to check if the un-prefixed events are usable, and if not remove them from the map.
  if (!('AnimationEvent' in window)) {
    delete vendorPrefixes.animationend.animation;
    delete vendorPrefixes.animationiteration.animation;
    delete vendorPrefixes.animationstart.animation;
  }

  // Same as above
  if (!('TransitionEvent' in window)) {
    delete vendorPrefixes.transitionend.transition;
  }
}

/**
 * Attempts to determine the correct vendor prefixed event name.
 *
 * @param {string} eventName
 * @returns {string}
 */
function getVendorPrefixedEventName(eventName) {
  if (prefixedEventNames[eventName]) {
    return prefixedEventNames[eventName];
  } else if (!vendorPrefixes[eventName]) {
    return eventName;
  }

  var prefixMap = vendorPrefixes[eventName];

  for (var styleProp in prefixMap) {
    if (prefixMap.hasOwnProperty(styleProp) && styleProp in style) {
      return prefixedEventNames[eventName] = prefixMap[styleProp];
    }
  }

  return '';
}

var getVendorPrefixedEventName_1 = getVendorPrefixedEventName;

/**
 * Types of raw signals from the browser caught at the top level.
 *
 * For events like 'submit' which don't consistently bubble (which we
 * trap at a lower node than `document`), binding at `document` would
 * cause duplicate events so we don't include them here.
 */
var topLevelTypes$1 = {
  topAbort: 'abort',
  topAnimationEnd: getVendorPrefixedEventName_1('animationend') || 'animationend',
  topAnimationIteration: getVendorPrefixedEventName_1('animationiteration') || 'animationiteration',
  topAnimationStart: getVendorPrefixedEventName_1('animationstart') || 'animationstart',
  topBlur: 'blur',
  topCancel: 'cancel',
  topCanPlay: 'canplay',
  topCanPlayThrough: 'canplaythrough',
  topChange: 'change',
  topClick: 'click',
  topClose: 'close',
  topCompositionEnd: 'compositionend',
  topCompositionStart: 'compositionstart',
  topCompositionUpdate: 'compositionupdate',
  topContextMenu: 'contextmenu',
  topCopy: 'copy',
  topCut: 'cut',
  topDoubleClick: 'dblclick',
  topDrag: 'drag',
  topDragEnd: 'dragend',
  topDragEnter: 'dragenter',
  topDragExit: 'dragexit',
  topDragLeave: 'dragleave',
  topDragOver: 'dragover',
  topDragStart: 'dragstart',
  topDrop: 'drop',
  topDurationChange: 'durationchange',
  topEmptied: 'emptied',
  topEncrypted: 'encrypted',
  topEnded: 'ended',
  topError: 'error',
  topFocus: 'focus',
  topInput: 'input',
  topKeyDown: 'keydown',
  topKeyPress: 'keypress',
  topKeyUp: 'keyup',
  topLoadedData: 'loadeddata',
  topLoad: 'load',
  topLoadedMetadata: 'loadedmetadata',
  topLoadStart: 'loadstart',
  topMouseDown: 'mousedown',
  topMouseMove: 'mousemove',
  topMouseOut: 'mouseout',
  topMouseOver: 'mouseover',
  topMouseUp: 'mouseup',
  topPaste: 'paste',
  topPause: 'pause',
  topPlay: 'play',
  topPlaying: 'playing',
  topProgress: 'progress',
  topRateChange: 'ratechange',
  topScroll: 'scroll',
  topSeeked: 'seeked',
  topSeeking: 'seeking',
  topSelectionChange: 'selectionchange',
  topStalled: 'stalled',
  topSuspend: 'suspend',
  topTextInput: 'textInput',
  topTimeUpdate: 'timeupdate',
  topToggle: 'toggle',
  topTouchCancel: 'touchcancel',
  topTouchEnd: 'touchend',
  topTouchMove: 'touchmove',
  topTouchStart: 'touchstart',
  topTransitionEnd: getVendorPrefixedEventName_1('transitionend') || 'transitionend',
  topVolumeChange: 'volumechange',
  topWaiting: 'waiting',
  topWheel: 'wheel'
};

var BrowserEventConstants = {
  topLevelTypes: topLevelTypes$1
};

var BrowserEventConstants_1 = BrowserEventConstants;

var topLevelTypes = BrowserEventConstants_1.topLevelTypes;

/**
 * Summary of `ReactBrowserEventEmitter` event handling:
 *
 *  - Top-level delegation is used to trap most native browser events. This
 *    may only occur in the main thread and is the responsibility of
 *    ReactDOMEventListener, which is injected and can therefore support
 *    pluggable event sources. This is the only work that occurs in the main
 *    thread.
 *
 *  - We normalize and de-duplicate events to account for browser quirks. This
 *    may be done in the worker thread.
 *
 *  - Forward these native events (with the associated top-level type used to
 *    trap it) to `EventPluginHub`, which in turn will ask plugins if they want
 *    to extract any synthetic events.
 *
 *  - The `EventPluginHub` will then process each event by annotating them with
 *    "dispatches", a sequence of listeners and IDs that care about that event.
 *
 *  - The `EventPluginHub` then dispatches the events.
 *
 * Overview of React and the event system:
 *
 * +------------+    .
 * |    DOM     |    .
 * +------------+    .
 *       |           .
 *       v           .
 * +------------+    .
 * | ReactEvent |    .
 * |  Listener  |    .
 * +------------+    .                         +-----------+
 *       |           .               +--------+|SimpleEvent|
 *       |           .               |         |Plugin     |
 * +-----|------+    .               v         +-----------+
 * |     |      |    .    +--------------+                    +------------+
 * |     +-----------.--->|EventPluginHub|                    |    Event   |
 * |            |    .    |              |     +-----------+  | Propagators|
 * | ReactEvent |    .    |              |     |TapEvent   |  |------------|
 * |  Emitter   |    .    |              |<---+|Plugin     |  |other plugin|
 * |            |    .    |              |     +-----------+  |  utilities |
 * |     +-----------.--->|              |                    +------------+
 * |     |      |    .    +--------------+
 * +-----|------+    .                ^        +-----------+
 *       |           .                |        |Enter/Leave|
 *       +           .                +-------+|Plugin     |
 * +-------------+   .                         +-----------+
 * | application |   .
 * |-------------|   .
 * |             |   .
 * |             |   .
 * +-------------+   .
 *                   .
 *    React Core     .  General Purpose Event Plugin System
 */

var alreadyListeningTo = {};
var reactTopListenersCounter = 0;

/**
 * To ensure no conflicts with other potential React instances on the page
 */
var topListenersIDKey = '_reactListenersID' + ('' + Math.random()).slice(2);

function getListeningForDocument(mountAt) {
  // In IE8, `mountAt` is a host object and doesn't have `hasOwnProperty`
  // directly.
  if (!Object.prototype.hasOwnProperty.call(mountAt, topListenersIDKey)) {
    mountAt[topListenersIDKey] = reactTopListenersCounter++;
    alreadyListeningTo[mountAt[topListenersIDKey]] = {};
  }
  return alreadyListeningTo[mountAt[topListenersIDKey]];
}

var ReactBrowserEventEmitter = assign({}, ReactEventEmitterMixin_1, {
  /**
   * Sets whether or not any created callbacks should be enabled.
   *
   * @param {boolean} enabled True if callbacks should be enabled.
   */
  setEnabled: function (enabled) {
    if (ReactDOMEventListener_1) {
      ReactDOMEventListener_1.setEnabled(enabled);
    }
  },

  /**
   * @return {boolean} True if callbacks are enabled.
   */
  isEnabled: function () {
    return !!(ReactDOMEventListener_1 && ReactDOMEventListener_1.isEnabled());
  },

  /**
   * We listen for bubbled touch events on the document object.
   *
   * Firefox v8.01 (and possibly others) exhibited strange behavior when
   * mounting `onmousemove` events at some node that was not the document
   * element. The symptoms were that if your mouse is not moving over something
   * contained within that mount point (for example on the background) the
   * top-level listeners for `onmousemove` won't be called. However, if you
   * register the `mousemove` on the document object, then it will of course
   * catch all `mousemove`s. This along with iOS quirks, justifies restricting
   * top-level listeners to the document object only, at least for these
   * movement types of events and possibly all events.
   *
   * @see http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
   *
   * Also, `keyup`/`keypress`/`keydown` do not bubble to the window on IE, but
   * they bubble to document.
   *
   * @param {string} registrationName Name of listener (e.g. `onClick`).
   * @param {object} contentDocumentHandle Document which owns the container
   */
  listenTo: function (registrationName, contentDocumentHandle) {
    var mountAt = contentDocumentHandle;
    var isListening = getListeningForDocument(mountAt);
    var dependencies = EventPluginRegistry_1.registrationNameDependencies[registrationName];

    for (var i = 0; i < dependencies.length; i++) {
      var dependency = dependencies[i];
      if (!(isListening.hasOwnProperty(dependency) && isListening[dependency])) {
        if (dependency === 'topWheel') {
          if (isEventSupported_1('wheel')) {
            ReactDOMEventListener_1.trapBubbledEvent('topWheel', 'wheel', mountAt);
          } else if (isEventSupported_1('mousewheel')) {
            ReactDOMEventListener_1.trapBubbledEvent('topWheel', 'mousewheel', mountAt);
          } else {
            // Firefox needs to capture a different mouse scroll event.
            // @see http://www.quirksmode.org/dom/events/tests/scroll.html
            ReactDOMEventListener_1.trapBubbledEvent('topWheel', 'DOMMouseScroll', mountAt);
          }
        } else if (dependency === 'topScroll') {
          ReactDOMEventListener_1.trapCapturedEvent('topScroll', 'scroll', mountAt);
        } else if (dependency === 'topFocus' || dependency === 'topBlur') {
          ReactDOMEventListener_1.trapCapturedEvent('topFocus', 'focus', mountAt);
          ReactDOMEventListener_1.trapCapturedEvent('topBlur', 'blur', mountAt);

          // to make sure blur and focus event listeners are only attached once
          isListening.topBlur = true;
          isListening.topFocus = true;
        } else if (dependency === 'topCancel') {
          if (isEventSupported_1('cancel', true)) {
            ReactDOMEventListener_1.trapCapturedEvent('topCancel', 'cancel', mountAt);
          }
          isListening.topCancel = true;
        } else if (dependency === 'topClose') {
          if (isEventSupported_1('close', true)) {
            ReactDOMEventListener_1.trapCapturedEvent('topClose', 'close', mountAt);
          }
          isListening.topClose = true;
        } else if (topLevelTypes.hasOwnProperty(dependency)) {
          ReactDOMEventListener_1.trapBubbledEvent(dependency, topLevelTypes[dependency], mountAt);
        }

        isListening[dependency] = true;
      }
    }
  },

  isListeningToAllDependencies: function (registrationName, mountAt) {
    var isListening = getListeningForDocument(mountAt);
    var dependencies = EventPluginRegistry_1.registrationNameDependencies[registrationName];
    for (var i = 0; i < dependencies.length; i++) {
      var dependency = dependencies[i];
      if (!(isListening.hasOwnProperty(dependency) && isListening[dependency])) {
        return false;
      }
    }
    return true;
  },

  trapBubbledEvent: function (topLevelType, handlerBaseName, handle) {
    return ReactDOMEventListener_1.trapBubbledEvent(topLevelType, handlerBaseName, handle);
  },

  trapCapturedEvent: function (topLevelType, handlerBaseName, handle) {
    return ReactDOMEventListener_1.trapCapturedEvent(topLevelType, handlerBaseName, handle);
  }
});

var ReactBrowserEventEmitter_1 = ReactBrowserEventEmitter;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactDOMFeatureFlags
 */

var ReactDOMFeatureFlags = {
  fiberAsyncScheduling: false
};

var ReactDOMFeatureFlags_1 = ReactDOMFeatureFlags;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule CSSProperty
 */

/**
 * CSS properties which accept numbers but are not in units of "px".
 */

var isUnitlessNumber$1 = {
  animationIterationCount: true,
  borderImageOutset: true,
  borderImageSlice: true,
  borderImageWidth: true,
  boxFlex: true,
  boxFlexGroup: true,
  boxOrdinalGroup: true,
  columnCount: true,
  columns: true,
  flex: true,
  flexGrow: true,
  flexPositive: true,
  flexShrink: true,
  flexNegative: true,
  flexOrder: true,
  gridRow: true,
  gridRowEnd: true,
  gridRowSpan: true,
  gridRowStart: true,
  gridColumn: true,
  gridColumnEnd: true,
  gridColumnSpan: true,
  gridColumnStart: true,
  fontWeight: true,
  lineClamp: true,
  lineHeight: true,
  opacity: true,
  order: true,
  orphans: true,
  tabSize: true,
  widows: true,
  zIndex: true,
  zoom: true,

  // SVG-related properties
  fillOpacity: true,
  floodOpacity: true,
  stopOpacity: true,
  strokeDasharray: true,
  strokeDashoffset: true,
  strokeMiterlimit: true,
  strokeOpacity: true,
  strokeWidth: true
};

/**
 * @param {string} prefix vendor-specific prefix, eg: Webkit
 * @param {string} key style name, eg: transitionDuration
 * @return {string} style name prefixed with `prefix`, properly camelCased, eg:
 * WebkitTransitionDuration
 */
function prefixKey(prefix, key) {
  return prefix + key.charAt(0).toUpperCase() + key.substring(1);
}

/**
 * Support style names that may come passed in prefixed by adding permutations
 * of vendor prefixes.
 */
var prefixes = ['Webkit', 'ms', 'Moz', 'O'];

// Using Object.keys here, or else the vanilla for-in loop makes IE8 go into an
// infinite loop, because it iterates over the newly added props too.
Object.keys(isUnitlessNumber$1).forEach(function (prop) {
  prefixes.forEach(function (prefix) {
    isUnitlessNumber$1[prefixKey(prefix, prop)] = isUnitlessNumber$1[prop];
  });
});

var CSSProperty = {
  isUnitlessNumber: isUnitlessNumber$1
};

var CSSProperty_1 = CSSProperty;

var isUnitlessNumber = CSSProperty_1.isUnitlessNumber;

/**
 * Convert a value into the proper css writable value. The style name `name`
 * should be logical (no hyphens), as specified
 * in `CSSProperty.isUnitlessNumber`.
 *
 * @param {string} name CSS property name such as `topMargin`.
 * @param {*} value CSS property value such as `10px`.
 * @return {string} Normalized style value with dimensions applied.
 */
function dangerousStyleValue(name, value, isCustomProperty) {
  // Note that we've removed escapeTextForBrowser() calls here since the
  // whole string will be escaped when the attribute is injected into
  // the markup. If you provide unsafe user data here they can inject
  // arbitrary CSS which may be problematic (I couldn't repro this):
  // https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
  // http://www.thespanner.co.uk/2007/11/26/ultimate-xss-css-injection/
  // This is not an XSS hole but instead a potential CSS injection issue
  // which has lead to a greater discussion about how we're going to
  // trust URLs moving forward. See #2115901

  var isEmpty = value == null || typeof value === 'boolean' || value === '';
  if (isEmpty) {
    return '';
  }

  if (!isCustomProperty && typeof value === 'number' && value !== 0 && !(isUnitlessNumber.hasOwnProperty(name) && isUnitlessNumber[name])) {
    return value + 'px'; // Presumes implicit 'px' suffix for unitless numbers
  }

  return ('' + value).trim();
}

var dangerousStyleValue_1 = dangerousStyleValue;

/**
 * Operations for dealing with CSS properties.
 */
var CSSPropertyOperations = {
  /**
   * This creates a string that is expected to be equivalent to the style
   * attribute generated by server-side rendering. It by-passes warnings and
   * security checks so it's not safe to use this value for anything other than
   * comparison. It is only used in DEV for SSR validation.
   */
  createDangerousStringForStyles: function (styles) {
    
  },

  /**
   * Sets the value for multiple styles on a node.  If a value is specified as
   * '' (empty string), the corresponding style property will be unset.
   *
   * @param {DOMElement} node
   * @param {object} styles
   * @param {ReactDOMComponent} component
   */
  setValueForStyles: function (node, styles, component) {
    var style = node.style;
    for (var styleName in styles) {
      if (!styles.hasOwnProperty(styleName)) {
        continue;
      }
      var isCustomProperty = styleName.indexOf('--') === 0;
      var styleValue = dangerousStyleValue_1(styleName, styles[styleName], isCustomProperty);
      if (styleName === 'float') {
        styleName = 'cssFloat';
      }
      if (isCustomProperty) {
        style.setProperty(styleName, styleValue);
      } else if (styleValue) {
        style[styleName] = styleValue;
      } else {
        style[styleName] = '';
      }
    }
  }
};

var CSSPropertyOperations_1 = CSSPropertyOperations;

// These attributes should be all lowercase to allow for
// case insensitive checks
var RESERVED_PROPS = {
  children: true,
  dangerouslySetInnerHTML: true,
  autoFocus: true,
  defaultValue: true,
  defaultChecked: true,
  innerHTML: true,
  suppressContentEditableWarning: true,
  style: true
};

function checkMask(value, bitmask) {
  return (value & bitmask) === bitmask;
}

var DOMPropertyInjection = {
  /**
   * Mapping from normalized, camelcased property names to a configuration that
   * specifies how the associated DOM property should be accessed or rendered.
   */
  MUST_USE_PROPERTY: 0x1,
  HAS_BOOLEAN_VALUE: 0x4,
  HAS_NUMERIC_VALUE: 0x8,
  HAS_POSITIVE_NUMERIC_VALUE: 0x10 | 0x8,
  HAS_OVERLOADED_BOOLEAN_VALUE: 0x20,
  HAS_STRING_BOOLEAN_VALUE: 0x40,

  /**
   * Inject some specialized knowledge about the DOM. This takes a config object
   * with the following properties:
   *
   * Properties: object mapping DOM property name to one of the
   * DOMPropertyInjection constants or null. If your attribute isn't in here,
   * it won't get written to the DOM.
   *
   * DOMAttributeNames: object mapping React attribute name to the DOM
   * attribute name. Attribute names not specified use the **lowercase**
   * normalized name.
   *
   * DOMAttributeNamespaces: object mapping React attribute name to the DOM
   * attribute namespace URL. (Attribute names not specified use no namespace.)
   *
   * DOMPropertyNames: similar to DOMAttributeNames but for DOM properties.
   * Property names not specified use the normalized name.
   *
   * DOMMutationMethods: Properties that require special mutation methods. If
   * `value` is undefined, the mutation method should unset the property.
   *
   * @param {object} domPropertyConfig the config as described above.
   */
  injectDOMPropertyConfig: function (domPropertyConfig) {
    var Injection = DOMPropertyInjection;
    var Properties = domPropertyConfig.Properties || {};
    var DOMAttributeNamespaces = domPropertyConfig.DOMAttributeNamespaces || {};
    var DOMAttributeNames = domPropertyConfig.DOMAttributeNames || {};
    var DOMMutationMethods = domPropertyConfig.DOMMutationMethods || {};

    for (var propName in Properties) {
      !!DOMProperty.properties.hasOwnProperty(propName) ? reactProdInvariant_1('48', propName) : void 0;

      var lowerCased = propName.toLowerCase();
      var propConfig = Properties[propName];

      var propertyInfo = {
        attributeName: lowerCased,
        attributeNamespace: null,
        propertyName: propName,
        mutationMethod: null,

        mustUseProperty: checkMask(propConfig, Injection.MUST_USE_PROPERTY),
        hasBooleanValue: checkMask(propConfig, Injection.HAS_BOOLEAN_VALUE),
        hasNumericValue: checkMask(propConfig, Injection.HAS_NUMERIC_VALUE),
        hasPositiveNumericValue: checkMask(propConfig, Injection.HAS_POSITIVE_NUMERIC_VALUE),
        hasOverloadedBooleanValue: checkMask(propConfig, Injection.HAS_OVERLOADED_BOOLEAN_VALUE),
        hasStringBooleanValue: checkMask(propConfig, Injection.HAS_STRING_BOOLEAN_VALUE)
      };
      !(propertyInfo.hasBooleanValue + propertyInfo.hasNumericValue + propertyInfo.hasOverloadedBooleanValue <= 1) ? reactProdInvariant_1('50', propName) : void 0;

      if (DOMAttributeNames.hasOwnProperty(propName)) {
        var attributeName = DOMAttributeNames[propName];

        propertyInfo.attributeName = attributeName;
      }

      if (DOMAttributeNamespaces.hasOwnProperty(propName)) {
        propertyInfo.attributeNamespace = DOMAttributeNamespaces[propName];
      }

      if (DOMMutationMethods.hasOwnProperty(propName)) {
        propertyInfo.mutationMethod = DOMMutationMethods[propName];
      }

      // Downcase references to whitelist properties to check for membership
      // without case-sensitivity. This allows the whitelist to pick up
      // `allowfullscreen`, which should be written using the property configuration
      // for `allowFullscreen`
      DOMProperty.properties[propName] = propertyInfo;
    }
  }
};

/* eslint-disable max-len */
var ATTRIBUTE_NAME_START_CHAR = ':A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD';
/* eslint-enable max-len */

/**
 * DOMProperty exports lookup objects that can be used like functions:
 *
 *   > DOMProperty.isValid['id']
 *   true
 *   > DOMProperty.isValid['foobar']
 *   undefined
 *
 * Although this may be confusing, it performs better in general.
 *
 * @see http://jsperf.com/key-exists
 * @see http://jsperf.com/key-missing
 */
var DOMProperty = {
  ID_ATTRIBUTE_NAME: 'data-reactid',
  ROOT_ATTRIBUTE_NAME: 'data-reactroot',

  ATTRIBUTE_NAME_START_CHAR: ATTRIBUTE_NAME_START_CHAR,
  ATTRIBUTE_NAME_CHAR: ATTRIBUTE_NAME_START_CHAR + '\\-.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040',

  /**
   * Map from property "standard name" to an object with info about how to set
   * the property in the DOM. Each object contains:
   *
   * attributeName:
   *   Used when rendering markup or with `*Attribute()`.
   * attributeNamespace
   * propertyName:
   *   Used on DOM node instances. (This includes properties that mutate due to
   *   external factors.)
   * mutationMethod:
   *   If non-null, used instead of the property or `setAttribute()` after
   *   initial render.
   * mustUseProperty:
   *   Whether the property must be accessed and mutated as an object property.
   * hasBooleanValue:
   *   Whether the property should be removed when set to a falsey value.
   * hasNumericValue:
   *   Whether the property must be numeric or parse as a numeric and should be
   *   removed when set to a falsey value.
   * hasPositiveNumericValue:
   *   Whether the property must be positive numeric or parse as a positive
   *   numeric and should be removed when set to a falsey value.
   * hasOverloadedBooleanValue:
   *   Whether the property can be used as a flag as well as with a value.
   *   Removed when strictly equal to false; present without a value when
   *   strictly equal to true; present with a value otherwise.
   */
  properties: {},

  /**
   * Checks whether a property name is a writeable attribute.
   * @method
   */
  shouldSetAttribute: function (name, value) {
    if (DOMProperty.isReservedProp(name)) {
      return false;
    }
    if ((name[0] === 'o' || name[0] === 'O') && (name[1] === 'n' || name[1] === 'N')) {
      return false;
    }
    if (value === null) {
      return true;
    }
    switch (typeof value) {
      case 'boolean':
        return DOMProperty.shouldAttributeAcceptBooleanValue(name);
      case 'undefined':
      case 'number':
      case 'string':
      case 'object':
        return true;
      default:
        // function, symbol
        return false;
    }
  },

  getPropertyInfo: function (name) {
    return DOMProperty.properties.hasOwnProperty(name) ? DOMProperty.properties[name] : null;
  },
  shouldAttributeAcceptBooleanValue: function (name) {
    if (DOMProperty.isReservedProp(name)) {
      return true;
    }
    var propertyInfo = DOMProperty.getPropertyInfo(name);
    if (propertyInfo) {
      return propertyInfo.hasBooleanValue || propertyInfo.hasStringBooleanValue || propertyInfo.hasOverloadedBooleanValue;
    }
    var prefix = name.toLowerCase().slice(0, 5);
    return prefix === 'data-' || prefix === 'aria-';
  },


  /**
   * Checks to see if a property name is within the list of properties
   * reserved for internal React operations. These properties should
   * not be set on an HTML element.
   *
   * @private
   * @param {string} name
   * @return {boolean} If the name is within reserved props
   */
  isReservedProp: function (name) {
    return RESERVED_PROPS.hasOwnProperty(name);
  },


  injection: DOMPropertyInjection
};

var DOMProperty_1 = DOMProperty;

// isAttributeNameSafe() is currently duplicated in DOMMarkupOperations.
// TODO: Find a better place for this.
var VALID_ATTRIBUTE_NAME_REGEX = new RegExp('^[' + DOMProperty_1.ATTRIBUTE_NAME_START_CHAR + '][' + DOMProperty_1.ATTRIBUTE_NAME_CHAR + ']*$');
var illegalAttributeNameCache = {};
var validatedAttributeNameCache = {};
function isAttributeNameSafe(attributeName) {
  if (validatedAttributeNameCache.hasOwnProperty(attributeName)) {
    return true;
  }
  if (illegalAttributeNameCache.hasOwnProperty(attributeName)) {
    return false;
  }
  if (VALID_ATTRIBUTE_NAME_REGEX.test(attributeName)) {
    validatedAttributeNameCache[attributeName] = true;
    return true;
  }
  illegalAttributeNameCache[attributeName] = true;
  return false;
}

// shouldIgnoreValue() is currently duplicated in DOMMarkupOperations.
// TODO: Find a better place for this.
function shouldIgnoreValue(propertyInfo, value) {
  return value == null || propertyInfo.hasBooleanValue && !value || propertyInfo.hasNumericValue && isNaN(value) || propertyInfo.hasPositiveNumericValue && value < 1 || propertyInfo.hasOverloadedBooleanValue && value === false;
}

/**
 * Operations for dealing with DOM properties.
 */
var DOMPropertyOperations = {
  setAttributeForID: function (node, id) {
    node.setAttribute(DOMProperty_1.ID_ATTRIBUTE_NAME, id);
  },

  setAttributeForRoot: function (node) {
    node.setAttribute(DOMProperty_1.ROOT_ATTRIBUTE_NAME, '');
  },

  /**
   * Get the value for a property on a node. Only used in DEV for SSR validation.
   * The "expected" argument is used as a hint of what the expected value is.
   * Some properties have multiple equivalent values.
   */
  getValueForProperty: function (node, name, expected) {
    
  },

  /**
   * Get the value for a attribute on a node. Only used in DEV for SSR validation.
   * The third argument is used as a hint of what the expected value is. Some
   * attributes have multiple equivalent values.
   */
  getValueForAttribute: function (node, name, expected) {
    
  },

  /**
   * Sets the value for a property on a node.
   *
   * @param {DOMElement} node
   * @param {string} name
   * @param {*} value
   */
  setValueForProperty: function (node, name, value) {
    var propertyInfo = DOMProperty_1.getPropertyInfo(name);

    if (propertyInfo && DOMProperty_1.shouldSetAttribute(name, value)) {
      var mutationMethod = propertyInfo.mutationMethod;
      if (mutationMethod) {
        mutationMethod(node, value);
      } else if (shouldIgnoreValue(propertyInfo, value)) {
        DOMPropertyOperations.deleteValueForProperty(node, name);
        return;
      } else if (propertyInfo.mustUseProperty) {
        // Contrary to `setAttribute`, object properties are properly
        // `toString`ed by IE8/9.
        node[propertyInfo.propertyName] = value;
      } else {
        var attributeName = propertyInfo.attributeName;
        var namespace = propertyInfo.attributeNamespace;
        // `setAttribute` with objects becomes only `[object]` in IE8/9,
        // ('' + value) makes it output the correct toString()-value.
        if (namespace) {
          node.setAttributeNS(namespace, attributeName, '' + value);
        } else if (propertyInfo.hasBooleanValue || propertyInfo.hasOverloadedBooleanValue && value === true) {
          node.setAttribute(attributeName, '');
        } else {
          node.setAttribute(attributeName, '' + value);
        }
      }
    } else {
      DOMPropertyOperations.setValueForAttribute(node, name, DOMProperty_1.shouldSetAttribute(name, value) ? value : null);
      return;
    }

    
  },

  setValueForAttribute: function (node, name, value) {
    if (!isAttributeNameSafe(name)) {
      return;
    }
    if (value == null) {
      node.removeAttribute(name);
    } else {
      node.setAttribute(name, '' + value);
    }

    
  },

  /**
   * Deletes an attributes from a node.
   *
   * @param {DOMElement} node
   * @param {string} name
   */
  deleteValueForAttribute: function (node, name) {
    node.removeAttribute(name);
  },

  /**
   * Deletes the value for a property on a node.
   *
   * @param {DOMElement} node
   * @param {string} name
   */
  deleteValueForProperty: function (node, name) {
    var propertyInfo = DOMProperty_1.getPropertyInfo(name);
    if (propertyInfo) {
      var mutationMethod = propertyInfo.mutationMethod;
      if (mutationMethod) {
        mutationMethod(node, undefined);
      } else if (propertyInfo.mustUseProperty) {
        var propName = propertyInfo.propertyName;
        if (propertyInfo.hasBooleanValue) {
          node[propName] = false;
        } else {
          node[propName] = '';
        }
      } else {
        node.removeAttribute(propertyInfo.attributeName);
      }
    } else {
      node.removeAttribute(name);
    }
  }
};

var DOMPropertyOperations_1 = DOMPropertyOperations;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactControlledValuePropTypes
 */

var ReactDebugCurrentFrame = ReactGlobalSharedState_1.ReactDebugCurrentFrame;

function getCurrentFiberOwnerName$2() {
  return null;
}

function getCurrentFiberStackAddendum$2() {
  return null;
}

function resetCurrentFiber() {
  ReactDebugCurrentFrame.getCurrentStack = null;
  ReactDebugCurrentFiber.current = null;
  ReactDebugCurrentFiber.phase = null;
}

function setCurrentFiber(fiber) {
  ReactDebugCurrentFrame.getCurrentStack = getCurrentFiberStackAddendum$2;
  ReactDebugCurrentFiber.current = fiber;
  ReactDebugCurrentFiber.phase = null;
}

function setCurrentPhase(phase) {
  ReactDebugCurrentFiber.phase = phase;
}

var ReactDebugCurrentFiber = {
  current: null,
  phase: null,
  resetCurrentFiber: resetCurrentFiber,
  setCurrentFiber: setCurrentFiber,
  setCurrentPhase: setCurrentPhase,
  getCurrentFiberOwnerName: getCurrentFiberOwnerName$2,
  getCurrentFiberStackAddendum: getCurrentFiberStackAddendum$2
};

var ReactDebugCurrentFiber_1 = ReactDebugCurrentFiber;

function isControlled(props) {
  var usesChecked = props.type === 'checkbox' || props.type === 'radio';
  return usesChecked ? props.checked != null : props.value != null;
}

/**
 * Implements an <input> host component that allows setting these optional
 * props: `checked`, `value`, `defaultChecked`, and `defaultValue`.
 *
 * If `checked` or `value` are not supplied (or null/undefined), user actions
 * that affect the checked state or value will trigger updates to the element.
 *
 * If they are supplied (and not null/undefined), the rendered element will not
 * trigger updates to the element. Instead, the props must change in order for
 * the rendered element to be updated.
 *
 * The rendered element will be initialized as unchecked (or `defaultChecked`)
 * with an empty value (or `defaultValue`).
 *
 * See http://www.w3.org/TR/2012/WD-html5-20121025/the-input-element.html
 */
var ReactDOMInput = {
  getHostProps: function (element, props) {
    var node = element;
    var value = props.value;
    var checked = props.checked;

    var hostProps = assign({
      // Make sure we set .type before any other properties (setting .value
      // before .type means .value is lost in IE11 and below)
      type: undefined,
      // Make sure we set .step before .value (setting .value before .step
      // means .value is rounded on mount, based upon step precision)
      step: undefined,
      // Make sure we set .min & .max before .value (to ensure proper order
      // in corner cases such as min or max deriving from value, e.g. Issue #7170)
      min: undefined,
      max: undefined
    }, props, {
      defaultChecked: undefined,
      defaultValue: undefined,
      value: value != null ? value : node._wrapperState.initialValue,
      checked: checked != null ? checked : node._wrapperState.initialChecked
    });

    return hostProps;
  },

  initWrapperState: function (element, props) {
    var defaultValue = props.defaultValue;
    var node = element;
    node._wrapperState = {
      initialChecked: props.checked != null ? props.checked : props.defaultChecked,
      initialValue: props.value != null ? props.value : defaultValue,
      controlled: isControlled(props)
    };
  },

  updateWrapper: function (element, props) {
    var node = element;
    var checked = props.checked;
    if (checked != null) {
      DOMPropertyOperations_1.setValueForProperty(node, 'checked', checked || false);
    }

    var value = props.value;
    if (value != null) {
      if (value === 0 && node.value === '') {
        node.value = '0';
        // Note: IE9 reports a number inputs as 'text', so check props instead.
      } else if (props.type === 'number') {
        // Simulate `input.valueAsNumber`. IE9 does not support it
        var valueAsNumber = parseFloat(node.value) || 0;

        if (
        // eslint-disable-next-line
        value != valueAsNumber ||
        // eslint-disable-next-line
        value == valueAsNumber && node.value != value) {
          // Cast `value` to a string to ensure the value is set correctly. While
          // browsers typically do this as necessary, jsdom doesn't.
          node.value = '' + value;
        }
      } else if (node.value !== '' + value) {
        // Cast `value` to a string to ensure the value is set correctly. While
        // browsers typically do this as necessary, jsdom doesn't.
        node.value = '' + value;
      }
    } else {
      if (props.value == null && props.defaultValue != null) {
        // In Chrome, assigning defaultValue to certain input types triggers input validation.
        // For number inputs, the display value loses trailing decimal points. For email inputs,
        // Chrome raises "The specified value <x> is not a valid email address".
        //
        // Here we check to see if the defaultValue has actually changed, avoiding these problems
        // when the user is inputting text
        //
        // https://github.com/facebook/react/issues/7253
        if (node.defaultValue !== '' + props.defaultValue) {
          node.defaultValue = '' + props.defaultValue;
        }
      }
      if (props.checked == null && props.defaultChecked != null) {
        node.defaultChecked = !!props.defaultChecked;
      }
    }
  },

  postMountWrapper: function (element, props) {
    var node = element;

    // Detach value from defaultValue. We won't do anything if we're working on
    // submit or reset inputs as those values & defaultValues are linked. They
    // are not resetable nodes so this operation doesn't matter and actually
    // removes browser-default values (eg "Submit Query") when no value is
    // provided.

    switch (props.type) {
      case 'submit':
      case 'reset':
        break;
      case 'color':
      case 'date':
      case 'datetime':
      case 'datetime-local':
      case 'month':
      case 'time':
      case 'week':
        // This fixes the no-show issue on iOS Safari and Android Chrome:
        // https://github.com/facebook/react/issues/7233
        node.value = '';
        node.value = node.defaultValue;
        break;
      default:
        node.value = node.value;
        break;
    }

    // Normally, we'd just do `node.checked = node.checked` upon initial mount, less this bug
    // this is needed to work around a chrome bug where setting defaultChecked
    // will sometimes influence the value of checked (even after detachment).
    // Reference: https://bugs.chromium.org/p/chromium/issues/detail?id=608416
    // We need to temporarily unset name to avoid disrupting radio button groups.
    var name = node.name;
    if (name !== '') {
      node.name = '';
    }
    node.defaultChecked = !node.defaultChecked;
    node.defaultChecked = !node.defaultChecked;
    if (name !== '') {
      node.name = name;
    }
  },

  restoreControlledState: function (element, props) {
    var node = element;
    ReactDOMInput.updateWrapper(node, props);
    updateNamedCousins(node, props);
  }
};

function updateNamedCousins(rootNode, props) {
  var name = props.name;
  if (props.type === 'radio' && name != null) {
    var queryRoot = rootNode;

    while (queryRoot.parentNode) {
      queryRoot = queryRoot.parentNode;
    }

    // If `rootNode.form` was non-null, then we could try `form.elements`,
    // but that sometimes behaves strangely in IE8. We could also try using
    // `form.getElementsByName`, but that will only return direct children
    // and won't include inputs that use the HTML5 `form=` attribute. Since
    // the input might not even be in a form. It might not even be in the
    // document. Let's just use the local `querySelectorAll` to ensure we don't
    // miss anything.
    var group = queryRoot.querySelectorAll('input[name=' + JSON.stringify('' + name) + '][type="radio"]');

    for (var i = 0; i < group.length; i++) {
      var otherNode = group[i];
      if (otherNode === rootNode || otherNode.form !== rootNode.form) {
        continue;
      }
      // This will throw if radio buttons rendered by different copies of React
      // and the same name are rendered into the same form (same as #1939).
      // That's probably okay; we don't support it just as we don't support
      // mixing React radio buttons with non-React ones.
      var otherProps = ReactDOMComponentTree_1.getFiberCurrentPropsFromNode(otherNode);
      !otherProps ? reactProdInvariant_1('90') : void 0;
      // If this is a controlled radio button group, forcing the input that
      // was previously checked to update will cause it to be come re-checked
      // as appropriate.
      ReactDOMInput.updateWrapper(otherNode, otherProps);
    }
  }
}

var ReactDOMFiberInput = ReactDOMInput;

function flattenChildren(children) {
  var content = '';

  // Flatten children and warn if they aren't strings or numbers;
  // invalid types are ignored.
  // We can silently skip them because invalid DOM nesting warning
  // catches these cases in Fiber.
  require$$0.Children.forEach(children, function (child) {
    if (child == null) {
      return;
    }
    if (typeof child === 'string' || typeof child === 'number') {
      content += child;
    }
  });

  return content;
}

/**
 * Implements an <option> host component that warns when `selected` is set.
 */
var ReactDOMOption = {
  validateProps: function (element, props) {
    // TODO (yungsters): Remove support for `selected` in <option>.
    
  },

  postMountWrapper: function (element, props) {
    // value="" should make a value attribute (#6219)
    if (props.value != null) {
      element.setAttribute('value', props.value);
    }
  },

  getHostProps: function (element, props) {
    var hostProps = assign({ children: undefined }, props);

    var content = flattenChildren(props.children);

    if (content) {
      hostProps.children = content;
    }

    return hostProps;
  }
};

var ReactDOMFiberOption = ReactDOMOption;

function updateOptions(node, multiple, propValue) {
  var options = node.options;

  if (multiple) {
    var selectedValues = propValue;
    var selectedValue = {};
    for (var i = 0; i < selectedValues.length; i++) {
      // Prefix to avoid chaos with special keys.
      selectedValue['$' + selectedValues[i]] = true;
    }
    for (var _i = 0; _i < options.length; _i++) {
      var selected = selectedValue.hasOwnProperty('$' + options[_i].value);
      if (options[_i].selected !== selected) {
        options[_i].selected = selected;
      }
    }
  } else {
    // Do not set `select.value` as exact behavior isn't consistent across all
    // browsers for all cases.
    var _selectedValue = '' + propValue;
    var defaultSelected = null;
    for (var _i2 = 0; _i2 < options.length; _i2++) {
      if (options[_i2].value === _selectedValue) {
        options[_i2].selected = true;
        return;
      }
      if (defaultSelected === null && !options[_i2].disabled) {
        defaultSelected = options[_i2];
      }
    }
    if (defaultSelected !== null) {
      defaultSelected.selected = true;
    }
  }
}

/**
 * Implements a <select> host component that allows optionally setting the
 * props `value` and `defaultValue`. If `multiple` is false, the prop must be a
 * stringable. If `multiple` is true, the prop must be an array of stringables.
 *
 * If `value` is not supplied (or null/undefined), user actions that change the
 * selected option will trigger updates to the rendered options.
 *
 * If it is supplied (and not null/undefined), the rendered options will not
 * update in response to user actions. Instead, the `value` prop must change in
 * order for the rendered options to update.
 *
 * If `defaultValue` is provided, any options with the supplied values will be
 * selected.
 */
var ReactDOMSelect = {
  getHostProps: function (element, props) {
    return assign({}, props, {
      value: undefined
    });
  },

  initWrapperState: function (element, props) {
    var node = element;
    var value = props.value;
    node._wrapperState = {
      initialValue: value != null ? value : props.defaultValue,
      wasMultiple: !!props.multiple
    };

    
  },

  postMountWrapper: function (element, props) {
    var node = element;
    node.multiple = !!props.multiple;
    var value = props.value;
    if (value != null) {
      updateOptions(node, !!props.multiple, value);
    } else if (props.defaultValue != null) {
      updateOptions(node, !!props.multiple, props.defaultValue);
    }
  },

  postUpdateWrapper: function (element, props) {
    var node = element;
    // After the initial mount, we control selected-ness manually so don't pass
    // this value down
    node._wrapperState.initialValue = undefined;

    var wasMultiple = node._wrapperState.wasMultiple;
    node._wrapperState.wasMultiple = !!props.multiple;

    var value = props.value;
    if (value != null) {
      updateOptions(node, !!props.multiple, value);
    } else if (wasMultiple !== !!props.multiple) {
      // For simplicity, reapply `defaultValue` if `multiple` is toggled.
      if (props.defaultValue != null) {
        updateOptions(node, !!props.multiple, props.defaultValue);
      } else {
        // Revert the select back to its default unselected state.
        updateOptions(node, !!props.multiple, props.multiple ? [] : '');
      }
    }
  },

  restoreControlledState: function (element, props) {
    var node = element;
    var value = props.value;

    if (value != null) {
      updateOptions(node, !!props.multiple, value);
    }
  }
};

var ReactDOMFiberSelect = ReactDOMSelect;

/**
 * Implements a <textarea> host component that allows setting `value`, and
 * `defaultValue`. This differs from the traditional DOM API because value is
 * usually set as PCDATA children.
 *
 * If `value` is not supplied (or null/undefined), user actions that affect the
 * value will trigger updates to the element.
 *
 * If `value` is supplied (and not null/undefined), the rendered element will
 * not trigger updates to the element. Instead, the `value` prop must change in
 * order for the rendered element to be updated.
 *
 * The rendered element will be initialized with an empty value, the prop
 * `defaultValue` if specified, or the children content (deprecated).
 */
var ReactDOMTextarea = {
  getHostProps: function (element, props) {
    var node = element;
    !(props.dangerouslySetInnerHTML == null) ? reactProdInvariant_1('91') : void 0;

    // Always set children to the same thing. In IE9, the selection range will
    // get reset if `textContent` is mutated.  We could add a check in setTextContent
    // to only set the value if/when the value differs from the node value (which would
    // completely solve this IE9 bug), but Sebastian+Sophie seemed to like this
    // solution. The value can be a boolean or object so that's why it's forced
    // to be a string.
    var hostProps = assign({}, props, {
      value: undefined,
      defaultValue: undefined,
      children: '' + node._wrapperState.initialValue
    });

    return hostProps;
  },

  initWrapperState: function (element, props) {
    var node = element;
    var value = props.value;
    var initialValue = value;

    // Only bother fetching default value if we're going to use it
    if (value == null) {
      var defaultValue = props.defaultValue;
      // TODO (yungsters): Remove support for children content in <textarea>.
      var children = props.children;
      if (children != null) {
        !(defaultValue == null) ? reactProdInvariant_1('92') : void 0;
        if (Array.isArray(children)) {
          !(children.length <= 1) ? reactProdInvariant_1('93') : void 0;
          children = children[0];
        }

        defaultValue = '' + children;
      }
      if (defaultValue == null) {
        defaultValue = '';
      }
      initialValue = defaultValue;
    }

    node._wrapperState = {
      initialValue: '' + initialValue
    };
  },

  updateWrapper: function (element, props) {
    var node = element;
    var value = props.value;
    if (value != null) {
      // Cast `value` to a string to ensure the value is set correctly. While
      // browsers typically do this as necessary, jsdom doesn't.
      var newValue = '' + value;

      // To avoid side effects (such as losing text selection), only set value if changed
      if (newValue !== node.value) {
        node.value = newValue;
      }
      if (props.defaultValue == null) {
        node.defaultValue = newValue;
      }
    }
    if (props.defaultValue != null) {
      node.defaultValue = props.defaultValue;
    }
  },

  postMountWrapper: function (element, props) {
    var node = element;
    // This is in postMount because we need access to the DOM node, which is not
    // available until after the component has mounted.
    var textContent = node.textContent;

    // Only set node.value if textContent is equal to the expected
    // initial value. In IE10/IE11 there is a bug where the placeholder attribute
    // will populate textContent as well.
    // https://developer.microsoft.com/microsoft-edge/platform/issues/101525/
    if (textContent === node._wrapperState.initialValue) {
      node.value = textContent;
    }
  },

  restoreControlledState: function (element, props) {
    // DOM component is still mounted; update
    ReactDOMTextarea.updateWrapper(element, props);
  }
};

var ReactDOMFiberTextarea = ReactDOMTextarea;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule omittedCloseTags
 */

// For HTML, certain tags should omit their close tag. We keep a whitelist for
// those special-case tags.

var omittedCloseTags = {
  area: true,
  base: true,
  br: true,
  col: true,
  embed: true,
  hr: true,
  img: true,
  input: true,
  keygen: true,
  link: true,
  meta: true,
  param: true,
  source: true,
  track: true,
  wbr: true
};

var omittedCloseTags_1 = omittedCloseTags;

// For HTML, certain tags cannot have children. This has the same purpose as
// `omittedCloseTags` except that `menuitem` should still have its closing tag.

var voidElementTags = assign({
  menuitem: true
}, omittedCloseTags_1);

var voidElementTags_1 = voidElementTags;

var HTML$1 = '__html';

function getDeclarationErrorAddendum$1(getCurrentOwnerName) {
  return '';
}

function assertValidProps(tag, props, getCurrentOwnerName) {
  if (!props) {
    return;
  }
  // Note the use of `==` which checks for null or undefined.
  if (voidElementTags_1[tag]) {
    !(props.children == null && props.dangerouslySetInnerHTML == null) ? reactProdInvariant_1('137', tag, getDeclarationErrorAddendum$1(getCurrentOwnerName)) : void 0;
  }
  if (props.dangerouslySetInnerHTML != null) {
    !(props.children == null) ? reactProdInvariant_1('60') : void 0;
    !(typeof props.dangerouslySetInnerHTML === 'object' && HTML$1 in props.dangerouslySetInnerHTML) ? reactProdInvariant_1('61') : void 0;
  }
  !(props.style == null || typeof props.style === 'object') ? reactProdInvariant_1('62', getDeclarationErrorAddendum$1(getCurrentOwnerName)) : void 0;
}

var assertValidProps_1 = assertValidProps;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule inputValueTracking
 * 
 */

function isCheckable(elem) {
  var type = elem.type;
  var nodeName = elem.nodeName;
  return nodeName && nodeName.toLowerCase() === 'input' && (type === 'checkbox' || type === 'radio');
}

function getTracker(node) {
  return node._valueTracker;
}

function detachTracker(node) {
  node._valueTracker = null;
}

function getValueFromNode(node) {
  var value = '';
  if (!node) {
    return value;
  }

  if (isCheckable(node)) {
    value = node.checked ? 'true' : 'false';
  } else {
    value = node.value;
  }

  return value;
}

function trackValueOnNode(node) {
  var valueField = isCheckable(node) ? 'checked' : 'value';
  var descriptor = Object.getOwnPropertyDescriptor(node.constructor.prototype, valueField);

  var currentValue = '' + node[valueField];

  // if someone has already defined a value or Safari, then bail
  // and don't track value will cause over reporting of changes,
  // but it's better then a hard failure
  // (needed for certain tests that spyOn input values and Safari)
  if (node.hasOwnProperty(valueField) || typeof descriptor.get !== 'function' || typeof descriptor.set !== 'function') {
    return;
  }

  Object.defineProperty(node, valueField, {
    enumerable: descriptor.enumerable,
    configurable: true,
    get: function () {
      return descriptor.get.call(this);
    },
    set: function (value) {
      currentValue = '' + value;
      descriptor.set.call(this, value);
    }
  });

  var tracker = {
    getValue: function () {
      return currentValue;
    },
    setValue: function (value) {
      currentValue = '' + value;
    },
    stopTracking: function () {
      detachTracker(node);
      delete node[valueField];
    }
  };
  return tracker;
}

var inputValueTracking = {
  // exposed for testing
  _getTrackerFromNode: getTracker,

  track: function (node) {
    if (getTracker(node)) {
      return;
    }

    // TODO: Once it's just Fiber we can move this to node._wrapperState
    node._valueTracker = trackValueOnNode(node);
  },
  updateValueIfChanged: function (node) {
    if (!node) {
      return false;
    }

    var tracker = getTracker(node);
    // if there is no tracker at this point it's unlikely
    // that trying again will succeed
    if (!tracker) {
      return true;
    }

    var lastValue = tracker.getValue();
    var nextValue = getValueFromNode(node);
    if (nextValue !== lastValue) {
      tracker.setValue(nextValue);
      return true;
    }
    return false;
  },
  stopTracking: function (node) {
    var tracker = getTracker(node);
    if (tracker) {
      tracker.stopTracking();
    }
  }
};

var inputValueTracking_1 = inputValueTracking;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule isCustomComponent
 * 
 */

function isCustomComponent(tagName, props) {
  if (tagName.indexOf('-') === -1) {
    return typeof props.is === 'string';
  }
  switch (tagName) {
    // These are reserved SVG and MathML elements.
    // We don't mind this whitelist too much because we expect it to never grow.
    // The alternative is to track the namespace in a few places which is convoluted.
    // https://w3c.github.io/webcomponents/spec/custom/#custom-elements-core-concepts
    case 'annotation-xml':
    case 'color-profile':
    case 'font-face':
    case 'font-face-src':
    case 'font-face-uri':
    case 'font-face-format':
    case 'font-face-name':
    case 'missing-glyph':
      return false;
    default:
      return true;
  }
}

var isCustomComponent_1 = isCustomComponent;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule createMicrosoftUnsafeLocalFunction
 */

/* globals MSApp */

/**
 * Create a function which has 'unsafe' privileges (required by windows8 apps)
 */

var createMicrosoftUnsafeLocalFunction = function (func) {
  if (typeof MSApp !== 'undefined' && MSApp.execUnsafeLocalFunction) {
    return function (arg0, arg1, arg2, arg3) {
      MSApp.execUnsafeLocalFunction(function () {
        return func(arg0, arg1, arg2, arg3);
      });
    };
  } else {
    return func;
  }
};

var createMicrosoftUnsafeLocalFunction_1 = createMicrosoftUnsafeLocalFunction;

var Namespaces$1 = DOMNamespaces.Namespaces;


// SVG temp container for IE lacking innerHTML
var reusableSVGContainer;

/**
 * Set the innerHTML property of a node
 *
 * @param {DOMElement} node
 * @param {string} html
 * @internal
 */
var setInnerHTML = createMicrosoftUnsafeLocalFunction_1(function (node, html) {
  // IE does not have innerHTML for SVG nodes, so instead we inject the
  // new markup in a temp node and then move the child nodes across into
  // the target node
  if (node.namespaceURI === Namespaces$1.svg && !('innerHTML' in node)) {
    reusableSVGContainer = reusableSVGContainer || document.createElement('div');
    reusableSVGContainer.innerHTML = '<svg>' + html + '</svg>';
    var svgNode = reusableSVGContainer.firstChild;
    while (svgNode.firstChild) {
      node.appendChild(svgNode.firstChild);
    }
  } else {
    node.innerHTML = html;
  }
});

var setInnerHTML_1 = setInnerHTML;

/**
 * Copyright (c) 2016-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * Based on the escape-html library, which is used under the MIT License below:
 *
 * Copyright (c) 2012-2013 TJ Holowaychuk
 * Copyright (c) 2015 Andreas Lubbe
 * Copyright (c) 2015 Tiancheng "Timothy" Gu
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * 'Software'), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * @providesModule escapeTextContentForBrowser
 */

// code copied and modified from escape-html
/**
 * Module variables.
 * @private
 */

var matchHtmlRegExp = /["'&<>]/;

/**
 * Escape special characters in the given string of html.
 *
 * @param  {string} string The string to escape for inserting into HTML
 * @return {string}
 * @public
 */

function escapeHtml(string) {
  var str = '' + string;
  var match = matchHtmlRegExp.exec(str);

  if (!match) {
    return str;
  }

  var escape;
  var html = '';
  var index = 0;
  var lastIndex = 0;

  for (index = match.index; index < str.length; index++) {
    switch (str.charCodeAt(index)) {
      case 34:
        // "
        escape = '&quot;';
        break;
      case 38:
        // &
        escape = '&amp;';
        break;
      case 39:
        // '
        escape = '&#x27;'; // modified from escape-html; used to be '&#39'
        break;
      case 60:
        // <
        escape = '&lt;';
        break;
      case 62:
        // >
        escape = '&gt;';
        break;
      default:
        continue;
    }

    if (lastIndex !== index) {
      html += str.substring(lastIndex, index);
    }

    lastIndex = index + 1;
    html += escape;
  }

  return lastIndex !== index ? html + str.substring(lastIndex, index) : html;
}
// end code copied and modified from escape-html

/**
 * Escapes text to prevent scripting attacks.
 *
 * @param {*} text Text value to escape.
 * @return {string} An escaped string.
 */
function escapeTextContentForBrowser(text) {
  if (typeof text === 'boolean' || typeof text === 'number') {
    // this shortcircuit helps perf for types that we know will never have
    // special characters, especially given that this function is used often
    // for numeric dom ids.
    return '' + text;
  }
  return escapeHtml(text);
}

var escapeTextContentForBrowser_1 = escapeTextContentForBrowser;

var TEXT_NODE$2 = HTMLNodeType_1.TEXT_NODE;

/**
 * Set the textContent property of a node, ensuring that whitespace is preserved
 * even in IE8. innerText is a poor substitute for textContent and, among many
 * issues, inserts <br> instead of the literal newline chars. innerHTML behaves
 * as it should.
 *
 * @param {DOMElement} node
 * @param {string} text
 * @internal
 */


var setTextContent = function (node, text) {
  if (text) {
    var firstChild = node.firstChild;

    if (firstChild && firstChild === node.lastChild && firstChild.nodeType === TEXT_NODE$2) {
      firstChild.nodeValue = text;
      return;
    }
  }
  node.textContent = text;
};

if (ExecutionEnvironment_1.canUseDOM) {
  if (!('textContent' in document.documentElement)) {
    setTextContent = function (node, text) {
      if (node.nodeType === TEXT_NODE$2) {
        node.nodeValue = text;
        return;
      }
      setInnerHTML_1(node, escapeTextContentForBrowser_1(text));
    };
  }
}

var setTextContent_1 = setTextContent;

var getCurrentFiberOwnerName = ReactDebugCurrentFiber_1.getCurrentFiberOwnerName;

var DOCUMENT_NODE$1 = HTMLNodeType_1.DOCUMENT_NODE;
var DOCUMENT_FRAGMENT_NODE$1 = HTMLNodeType_1.DOCUMENT_FRAGMENT_NODE;








var listenTo = ReactBrowserEventEmitter_1.listenTo;
var registrationNameModules = EventPluginRegistry_1.registrationNameModules;

var DANGEROUSLY_SET_INNER_HTML = 'dangerouslySetInnerHTML';
var SUPPRESS_CONTENT_EDITABLE_WARNING = 'suppressContentEditableWarning';
var CHILDREN = 'children';
var STYLE = 'style';
var HTML = '__html';

var HTML_NAMESPACE$1 = DOMNamespaces.Namespaces.html;
var getIntrinsicNamespace$1 = DOMNamespaces.getIntrinsicNamespace;


var warnForInvalidEventListener;

function ensureListeningTo(rootContainerElement, registrationName) {
  var isDocumentOrFragment = rootContainerElement.nodeType === DOCUMENT_NODE$1 || rootContainerElement.nodeType === DOCUMENT_FRAGMENT_NODE$1;
  var doc = isDocumentOrFragment ? rootContainerElement : rootContainerElement.ownerDocument;
  listenTo(registrationName, doc);
}

function getOwnerDocumentFromRootContainer(rootContainerElement) {
  return rootContainerElement.nodeType === DOCUMENT_NODE$1 ? rootContainerElement : rootContainerElement.ownerDocument;
}

// There are so many media events, it makes sense to just
// maintain a list rather than create a `trapBubbledEvent` for each
var mediaEvents = {
  topAbort: 'abort',
  topCanPlay: 'canplay',
  topCanPlayThrough: 'canplaythrough',
  topDurationChange: 'durationchange',
  topEmptied: 'emptied',
  topEncrypted: 'encrypted',
  topEnded: 'ended',
  topError: 'error',
  topLoadedData: 'loadeddata',
  topLoadedMetadata: 'loadedmetadata',
  topLoadStart: 'loadstart',
  topPause: 'pause',
  topPlay: 'play',
  topPlaying: 'playing',
  topProgress: 'progress',
  topRateChange: 'ratechange',
  topSeeked: 'seeked',
  topSeeking: 'seeking',
  topStalled: 'stalled',
  topSuspend: 'suspend',
  topTimeUpdate: 'timeupdate',
  topVolumeChange: 'volumechange',
  topWaiting: 'waiting'
};

function trapClickOnNonInteractiveElement(node) {
  // Mobile Safari does not fire properly bubble click events on
  // non-interactive elements, which means delegated click listeners do not
  // fire. The workaround for this bug involves attaching an empty click
  // listener on the target node.
  // http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
  // Just set it using the onclick property so that we don't have to manage any
  // bookkeeping for it. Not sure if we need to clear it when the listener is
  // removed.
  // TODO: Only do this for the relevant Safaris maybe?
  node.onclick = emptyFunction_1;
}

function setInitialDOMProperties(domElement, rootContainerElement, nextProps, isCustomComponentTag) {
  for (var propKey in nextProps) {
    if (!nextProps.hasOwnProperty(propKey)) {
      continue;
    }
    var nextProp = nextProps[propKey];
    if (propKey === STYLE) {
      CSSPropertyOperations_1.setValueForStyles(domElement, nextProp);
    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
      var nextHtml = nextProp ? nextProp[HTML] : undefined;
      if (nextHtml != null) {
        setInnerHTML_1(domElement, nextHtml);
      }
    } else if (propKey === CHILDREN) {
      if (typeof nextProp === 'string') {
        setTextContent_1(domElement, nextProp);
      } else if (typeof nextProp === 'number') {
        setTextContent_1(domElement, '' + nextProp);
      }
    } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING) {
      // Noop
    } else if (registrationNameModules.hasOwnProperty(propKey)) {
      if (nextProp != null) {
        if (false && typeof nextProp !== 'function') {
          warnForInvalidEventListener(propKey, nextProp);
        }
        ensureListeningTo(rootContainerElement, propKey);
      }
    } else if (isCustomComponentTag) {
      DOMPropertyOperations_1.setValueForAttribute(domElement, propKey, nextProp);
    } else if (nextProp != null) {
      // If we're updating to null or undefined, we should remove the property
      // from the DOM node instead of inadvertently setting to a string. This
      // brings us in line with the same behavior we have on initial render.
      DOMPropertyOperations_1.setValueForProperty(domElement, propKey, nextProp);
    }
  }
}

function updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag) {
  // TODO: Handle wasCustomComponentTag
  for (var i = 0; i < updatePayload.length; i += 2) {
    var propKey = updatePayload[i];
    var propValue = updatePayload[i + 1];
    if (propKey === STYLE) {
      CSSPropertyOperations_1.setValueForStyles(domElement, propValue);
    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
      setInnerHTML_1(domElement, propValue);
    } else if (propKey === CHILDREN) {
      setTextContent_1(domElement, propValue);
    } else if (isCustomComponentTag) {
      if (propValue != null) {
        DOMPropertyOperations_1.setValueForAttribute(domElement, propKey, propValue);
      } else {
        DOMPropertyOperations_1.deleteValueForAttribute(domElement, propKey);
      }
    } else if (propValue != null) {
      DOMPropertyOperations_1.setValueForProperty(domElement, propKey, propValue);
    } else {
      // If we're updating to null or undefined, we should remove the property
      // from the DOM node instead of inadvertently setting to a string. This
      // brings us in line with the same behavior we have on initial render.
      DOMPropertyOperations_1.deleteValueForProperty(domElement, propKey);
    }
  }
}

var ReactDOMFiberComponent = {
  createElement: function (type, props, rootContainerElement, parentNamespace) {
    // We create tags in the namespace of their parent container, except HTML
    var ownerDocument = getOwnerDocumentFromRootContainer(rootContainerElement);
    var domElement;
    var namespaceURI = parentNamespace;
    if (namespaceURI === HTML_NAMESPACE$1) {
      namespaceURI = getIntrinsicNamespace$1(type);
    }
    if (namespaceURI === HTML_NAMESPACE$1) {
      if (type === 'script') {
        // Create the script via .innerHTML so its "parser-inserted" flag is
        // set to true and it does not execute
        var div = ownerDocument.createElement('div');
        div.innerHTML = '<script><' + '/script>'; // eslint-disable-line
        // This is guaranteed to yield a script element.
        var firstChild = div.firstChild;
        domElement = div.removeChild(firstChild);
      } else if (typeof props.is === 'string') {
        // $FlowIssue `createElement` should be updated for Web Components
        domElement = ownerDocument.createElement(type, { is: props.is });
      } else {
        // Separate else branch instead of using `props.is || undefined` above because of a Firefox bug.
        // See discussion in https://github.com/facebook/react/pull/6896
        // and discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=1276240
        domElement = ownerDocument.createElement(type);
      }
    } else {
      domElement = ownerDocument.createElementNS(namespaceURI, type);
    }

    return domElement;
  },
  createTextNode: function (text, rootContainerElement) {
    return getOwnerDocumentFromRootContainer(rootContainerElement).createTextNode(text);
  },
  setInitialProperties: function (domElement, tag, rawProps, rootContainerElement) {
    var isCustomComponentTag = isCustomComponent_1(tag, rawProps);
    var props;
    switch (tag) {
      case 'iframe':
      case 'object':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topLoad', 'load', domElement);
        props = rawProps;
        break;
      case 'video':
      case 'audio':
        // Create listener for each media event
        for (var event in mediaEvents) {
          if (mediaEvents.hasOwnProperty(event)) {
            ReactBrowserEventEmitter_1.trapBubbledEvent(event, mediaEvents[event], domElement);
          }
        }
        props = rawProps;
        break;
      case 'source':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topError', 'error', domElement);
        props = rawProps;
        break;
      case 'img':
      case 'image':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topError', 'error', domElement);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topLoad', 'load', domElement);
        props = rawProps;
        break;
      case 'form':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topReset', 'reset', domElement);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topSubmit', 'submit', domElement);
        props = rawProps;
        break;
      case 'details':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topToggle', 'toggle', domElement);
        props = rawProps;
        break;
      case 'input':
        ReactDOMFiberInput.initWrapperState(domElement, rawProps);
        props = ReactDOMFiberInput.getHostProps(domElement, rawProps);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'option':
        ReactDOMFiberOption.validateProps(domElement, rawProps);
        props = ReactDOMFiberOption.getHostProps(domElement, rawProps);
        break;
      case 'select':
        ReactDOMFiberSelect.initWrapperState(domElement, rawProps);
        props = ReactDOMFiberSelect.getHostProps(domElement, rawProps);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'textarea':
        ReactDOMFiberTextarea.initWrapperState(domElement, rawProps);
        props = ReactDOMFiberTextarea.getHostProps(domElement, rawProps);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      default:
        props = rawProps;
    }

    assertValidProps_1(tag, props, getCurrentFiberOwnerName);

    setInitialDOMProperties(domElement, rootContainerElement, props, isCustomComponentTag);

    switch (tag) {
      case 'input':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        inputValueTracking_1.track(domElement);
        ReactDOMFiberInput.postMountWrapper(domElement, rawProps);
        break;
      case 'textarea':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        inputValueTracking_1.track(domElement);
        ReactDOMFiberTextarea.postMountWrapper(domElement, rawProps);
        break;
      case 'option':
        ReactDOMFiberOption.postMountWrapper(domElement, rawProps);
        break;
      case 'select':
        ReactDOMFiberSelect.postMountWrapper(domElement, rawProps);
        break;
      default:
        if (typeof props.onClick === 'function') {
          // TODO: This cast may not be sound for SVG, MathML or custom elements.
          trapClickOnNonInteractiveElement(domElement);
        }
        break;
    }
  },


  // Calculate the diff between the two objects.
  diffProperties: function (domElement, tag, lastRawProps, nextRawProps, rootContainerElement) {
    var updatePayload = null;

    var lastProps;
    var nextProps;
    switch (tag) {
      case 'input':
        lastProps = ReactDOMFiberInput.getHostProps(domElement, lastRawProps);
        nextProps = ReactDOMFiberInput.getHostProps(domElement, nextRawProps);
        updatePayload = [];
        break;
      case 'option':
        lastProps = ReactDOMFiberOption.getHostProps(domElement, lastRawProps);
        nextProps = ReactDOMFiberOption.getHostProps(domElement, nextRawProps);
        updatePayload = [];
        break;
      case 'select':
        lastProps = ReactDOMFiberSelect.getHostProps(domElement, lastRawProps);
        nextProps = ReactDOMFiberSelect.getHostProps(domElement, nextRawProps);
        updatePayload = [];
        break;
      case 'textarea':
        lastProps = ReactDOMFiberTextarea.getHostProps(domElement, lastRawProps);
        nextProps = ReactDOMFiberTextarea.getHostProps(domElement, nextRawProps);
        updatePayload = [];
        break;
      default:
        lastProps = lastRawProps;
        nextProps = nextRawProps;
        if (typeof lastProps.onClick !== 'function' && typeof nextProps.onClick === 'function') {
          // TODO: This cast may not be sound for SVG, MathML or custom elements.
          trapClickOnNonInteractiveElement(domElement);
        }
        break;
    }

    assertValidProps_1(tag, nextProps, getCurrentFiberOwnerName);

    var propKey;
    var styleName;
    var styleUpdates = null;
    for (propKey in lastProps) {
      if (nextProps.hasOwnProperty(propKey) || !lastProps.hasOwnProperty(propKey) || lastProps[propKey] == null) {
        continue;
      }
      if (propKey === STYLE) {
        var lastStyle = lastProps[propKey];
        for (styleName in lastStyle) {
          if (lastStyle.hasOwnProperty(styleName)) {
            if (!styleUpdates) {
              styleUpdates = {};
            }
            styleUpdates[styleName] = '';
          }
        }
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML || propKey === CHILDREN) {
        // Noop. This is handled by the clear text mechanism.
      } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING) {
        // Noop
      } else if (registrationNameModules.hasOwnProperty(propKey)) {
        // This is a special case. If any listener updates we need to ensure
        // that the "current" fiber pointer gets updated so we need a commit
        // to update this element.
        if (!updatePayload) {
          updatePayload = [];
        }
      } else {
        // For all other deleted properties we add it to the queue. We use
        // the whitelist in the commit phase instead.
        (updatePayload = updatePayload || []).push(propKey, null);
      }
    }
    for (propKey in nextProps) {
      var nextProp = nextProps[propKey];
      var lastProp = lastProps != null ? lastProps[propKey] : undefined;
      if (!nextProps.hasOwnProperty(propKey) || nextProp === lastProp || nextProp == null && lastProp == null) {
        continue;
      }
      if (propKey === STYLE) {
        if (lastProp) {
          // Unset styles on `lastProp` but not on `nextProp`.
          for (styleName in lastProp) {
            if (lastProp.hasOwnProperty(styleName) && (!nextProp || !nextProp.hasOwnProperty(styleName))) {
              if (!styleUpdates) {
                styleUpdates = {};
              }
              styleUpdates[styleName] = '';
            }
          }
          // Update styles that changed since `lastProp`.
          for (styleName in nextProp) {
            if (nextProp.hasOwnProperty(styleName) && lastProp[styleName] !== nextProp[styleName]) {
              if (!styleUpdates) {
                styleUpdates = {};
              }
              styleUpdates[styleName] = nextProp[styleName];
            }
          }
        } else {
          // Relies on `updateStylesByID` not mutating `styleUpdates`.
          if (!styleUpdates) {
            if (!updatePayload) {
              updatePayload = [];
            }
            updatePayload.push(propKey, styleUpdates);
          }
          styleUpdates = nextProp;
        }
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
        var nextHtml = nextProp ? nextProp[HTML] : undefined;
        var lastHtml = lastProp ? lastProp[HTML] : undefined;
        if (nextHtml != null) {
          if (lastHtml !== nextHtml) {
            (updatePayload = updatePayload || []).push(propKey, '' + nextHtml);
          }
        } else {
          // TODO: It might be too late to clear this if we have children
          // inserted already.
        }
      } else if (propKey === CHILDREN) {
        if (lastProp !== nextProp && (typeof nextProp === 'string' || typeof nextProp === 'number')) {
          (updatePayload = updatePayload || []).push(propKey, '' + nextProp);
        }
      } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING) {
        // Noop
      } else if (registrationNameModules.hasOwnProperty(propKey)) {
        if (nextProp != null) {
          // We eagerly listen to this even though we haven't committed yet.
          if (false && typeof nextProp !== 'function') {
            warnForInvalidEventListener(propKey, nextProp);
          }
          ensureListeningTo(rootContainerElement, propKey);
        }
        if (!updatePayload && lastProp !== nextProp) {
          // This is a special case. If any listener updates we need to ensure
          // that the "current" props pointer gets updated so we need a commit
          // to update this element.
          updatePayload = [];
        }
      } else {
        // For any other property we always add it to the queue and then we
        // filter it out using the whitelist during the commit.
        (updatePayload = updatePayload || []).push(propKey, nextProp);
      }
    }
    if (styleUpdates) {
      (updatePayload = updatePayload || []).push(STYLE, styleUpdates);
    }
    return updatePayload;
  },


  // Apply the diff.
  updateProperties: function (domElement, updatePayload, tag, lastRawProps, nextRawProps) {
    var wasCustomComponentTag = isCustomComponent_1(tag, lastRawProps);
    var isCustomComponentTag = isCustomComponent_1(tag, nextRawProps);
    // Apply the diff.
    updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag);

    // TODO: Ensure that an update gets scheduled if any of the special props
    // changed.
    switch (tag) {
      case 'input':
        // Update the wrapper around inputs *after* updating props. This has to
        // happen after `updateDOMProperties`. Otherwise HTML5 input validations
        // raise warnings and prevent the new value from being assigned.
        ReactDOMFiberInput.updateWrapper(domElement, nextRawProps);

        // We also check that we haven't missed a value update, such as a
        // Radio group shifting the checked value to another named radio input.
        inputValueTracking_1.updateValueIfChanged(domElement);
        break;
      case 'textarea':
        ReactDOMFiberTextarea.updateWrapper(domElement, nextRawProps);
        break;
      case 'select':
        // <select> value update needs to occur after <option> children
        // reconciliation
        ReactDOMFiberSelect.postUpdateWrapper(domElement, nextRawProps);
        break;
    }
  },
  diffHydratedProperties: function (domElement, tag, rawProps, parentNamespace, rootContainerElement) {
    switch (tag) {
      case 'iframe':
      case 'object':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topLoad', 'load', domElement);
        break;
      case 'video':
      case 'audio':
        // Create listener for each media event
        for (var event in mediaEvents) {
          if (mediaEvents.hasOwnProperty(event)) {
            ReactBrowserEventEmitter_1.trapBubbledEvent(event, mediaEvents[event], domElement);
          }
        }
        break;
      case 'source':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topError', 'error', domElement);
        break;
      case 'img':
      case 'image':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topError', 'error', domElement);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topLoad', 'load', domElement);
        break;
      case 'form':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topReset', 'reset', domElement);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topSubmit', 'submit', domElement);
        break;
      case 'details':
        ReactBrowserEventEmitter_1.trapBubbledEvent('topToggle', 'toggle', domElement);
        break;
      case 'input':
        ReactDOMFiberInput.initWrapperState(domElement, rawProps);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'option':
        ReactDOMFiberOption.validateProps(domElement, rawProps);
        break;
      case 'select':
        ReactDOMFiberSelect.initWrapperState(domElement, rawProps);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'textarea':
        ReactDOMFiberTextarea.initWrapperState(domElement, rawProps);
        ReactBrowserEventEmitter_1.trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
    }

    assertValidProps_1(tag, rawProps, getCurrentFiberOwnerName);

    var updatePayload = null;
    for (var propKey in rawProps) {
      if (!rawProps.hasOwnProperty(propKey)) {
        continue;
      }
      var nextProp = rawProps[propKey];
      if (propKey === CHILDREN) {
        // For text content children we compare against textContent. This
        // might match additional HTML that is hidden when we read it using
        // textContent. E.g. "foo" will match "f<span>oo</span>" but that still
        // satisfies our requirement. Our requirement is not to produce perfect
        // HTML and attributes. Ideally we should preserve structure but it's
        // ok not to if the visible content is still enough to indicate what
        // even listeners these nodes might be wired up to.
        // TODO: Warn if there is more than a single textNode as a child.
        // TODO: Should we use domElement.firstChild.nodeValue to compare?
        if (typeof nextProp === 'string') {
          if (domElement.textContent !== nextProp) {
            updatePayload = [CHILDREN, nextProp];
          }
        } else if (typeof nextProp === 'number') {
          if (domElement.textContent !== '' + nextProp) {
            updatePayload = [CHILDREN, '' + nextProp];
          }
        }
      } else if (registrationNameModules.hasOwnProperty(propKey)) {
        if (nextProp != null) {
          if (false && typeof nextProp !== 'function') {
            warnForInvalidEventListener(propKey, nextProp);
          }
          ensureListeningTo(rootContainerElement, propKey);
        }
      } else {}
    }

    switch (tag) {
      case 'input':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        inputValueTracking_1.track(domElement);
        ReactDOMFiberInput.postMountWrapper(domElement, rawProps);
        break;
      case 'textarea':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        inputValueTracking_1.track(domElement);
        ReactDOMFiberTextarea.postMountWrapper(domElement, rawProps);
        break;
      case 'select':
      case 'option':
        // For input and textarea we current always set the value property at
        // post mount to force it to diverge from attributes. However, for
        // option and select we don't quite do the same thing and select
        // is not resilient to the DOM state changing so we don't do that here.
        // TODO: Consider not doing this for input and textarea.
        break;
      default:
        if (typeof rawProps.onClick === 'function') {
          // TODO: This cast may not be sound for SVG, MathML or custom elements.
          trapClickOnNonInteractiveElement(domElement);
        }
        break;
    }

    return updatePayload;
  },
  diffHydratedText: function (textNode, text) {
    var isDifferent = textNode.nodeValue !== text;
    return isDifferent;
  },
  warnForDeletedHydratableElement: function (parentNode, child) {
    
  },
  warnForDeletedHydratableText: function (parentNode, child) {
    
  },
  warnForInsertedHydratedElement: function (parentNode, tag, props) {
    
  },
  warnForInsertedHydratedText: function (parentNode, text) {
    
  },
  restoreControlledState: function (domElement, tag, props) {
    switch (tag) {
      case 'input':
        ReactDOMFiberInput.restoreControlledState(domElement, props);
        return;
      case 'textarea':
        ReactDOMFiberTextarea.restoreControlledState(domElement, props);
        return;
      case 'select':
        ReactDOMFiberSelect.restoreControlledState(domElement, props);
        return;
    }
  }
};

var ReactDOMFiberComponent_1 = ReactDOMFiberComponent;

// This is a built-in polyfill for requestIdleCallback. It works by scheduling
// a requestAnimationFrame, storing the time for the start of the frame, then
// scheduling a postMessage which gets scheduled after paint. Within the
// postMessage handler do as much work as possible until time + frame rate.
// By separating the idle call into a separate event tick we ensure that
// layout, paint and other browser work is counted against the available time.
// The frame rate is dynamically adjusted.



// TODO: There's no way to cancel, because Fiber doesn't atm.
var rIC = void 0;

if (!ExecutionEnvironment_1.canUseDOM) {
  rIC = function (frameCallback) {
    setTimeout(function () {
      frameCallback({
        timeRemaining: function () {
          return Infinity;
        }
      });
    });
    return 0;
  };
} else if (typeof requestIdleCallback !== 'function') {
  // Polyfill requestIdleCallback.

  var scheduledRAFCallback = null;
  var scheduledRICCallback = null;

  var isIdleScheduled = false;
  var isAnimationFrameScheduled = false;

  var frameDeadline = 0;
  // We start out assuming that we run at 30fps but then the heuristic tracking
  // will adjust this value to a faster fps if we get more frequent animation
  // frames.
  var previousFrameTime = 33;
  var activeFrameTime = 33;

  var frameDeadlineObject = {
    timeRemaining: typeof performance === 'object' && typeof performance.now === 'function' ? function () {
      // We assume that if we have a performance timer that the rAF callback
      // gets a performance timer value. Not sure if this is always true.
      return frameDeadline - performance.now();
    } : function () {
      // As a fallback we use Date.now.
      return frameDeadline - Date.now();
    }
  };

  // We use the postMessage trick to defer idle work until after the repaint.
  var messageKey = '__reactIdleCallback$' + Math.random().toString(36).slice(2);
  var idleTick = function (event) {
    if (event.source !== window || event.data !== messageKey) {
      return;
    }
    isIdleScheduled = false;
    var callback = scheduledRICCallback;
    scheduledRICCallback = null;
    if (callback !== null) {
      callback(frameDeadlineObject);
    }
  };
  // Assumes that we have addEventListener in this environment. Might need
  // something better for old IE.
  window.addEventListener('message', idleTick, false);

  var animationTick = function (rafTime) {
    isAnimationFrameScheduled = false;
    var nextFrameTime = rafTime - frameDeadline + activeFrameTime;
    if (nextFrameTime < activeFrameTime && previousFrameTime < activeFrameTime) {
      if (nextFrameTime < 8) {
        // Defensive coding. We don't support higher frame rates than 120hz.
        // If we get lower than that, it is probably a bug.
        nextFrameTime = 8;
      }
      // If one frame goes long, then the next one can be short to catch up.
      // If two frames are short in a row, then that's an indication that we
      // actually have a higher frame rate than what we're currently optimizing.
      // We adjust our heuristic dynamically accordingly. For example, if we're
      // running on 120hz display or 90hz VR display.
      // Take the max of the two in case one of them was an anomaly due to
      // missed frame deadlines.
      activeFrameTime = nextFrameTime < previousFrameTime ? previousFrameTime : nextFrameTime;
    } else {
      previousFrameTime = nextFrameTime;
    }
    frameDeadline = rafTime + activeFrameTime;
    if (!isIdleScheduled) {
      isIdleScheduled = true;
      window.postMessage(messageKey, '*');
    }
    var callback = scheduledRAFCallback;
    scheduledRAFCallback = null;
    if (callback !== null) {
      callback(rafTime);
    }
  };

  rIC = function (callback) {
    // This assumes that we only schedule one callback at a time because that's
    // how Fiber uses it.
    scheduledRICCallback = callback;
    if (!isAnimationFrameScheduled) {
      // If rAF didn't already schedule one, we need to schedule a frame.
      // TODO: If this rAF doesn't materialize because the browser throttles, we
      // might want to still have setTimeout trigger rIC as a backup to ensure
      // that we keep performing work.
      isAnimationFrameScheduled = true;
      requestAnimationFrame(animationTick);
    }
    return 0;
  };
} else {
  rIC = requestIdleCallback;
}

var rIC_1 = rIC;

var ReactDOMFrameScheduling = {
	rIC: rIC_1
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactFeatureFlags
 * 
 */

var ReactFeatureFlags = {
  enableAsyncSubtreeAPI: true
};

var ReactFeatureFlags_1 = ReactFeatureFlags;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactPriorityLevel
 * 
 */

var ReactPriorityLevel = {
  NoWork: 0, // No work is pending.
  SynchronousPriority: 1, // For controlled text inputs. Synchronous side-effects.
  TaskPriority: 2, // Completes at the end of the current tick.
  HighPriority: 3, // Interaction that needs to complete pretty soon to feel responsive.
  LowPriority: 4, // Data fetching, or result from updating stores.
  OffscreenPriority: 5 };

var CallbackEffect = ReactTypeOfSideEffect.Callback;

var NoWork = ReactPriorityLevel.NoWork;
var SynchronousPriority = ReactPriorityLevel.SynchronousPriority;
var TaskPriority = ReactPriorityLevel.TaskPriority;

var ClassComponent$1 = ReactTypeOfWork.ClassComponent;
var HostRoot$2 = ReactTypeOfWork.HostRoot;


// Callbacks are not validated until invocation


// Singly linked-list of updates. When an update is scheduled, it is added to
// the queue of the current fiber and the work-in-progress fiber. The two queues
// are separate but they share a persistent structure.
//
// During reconciliation, updates are removed from the work-in-progress fiber,
// but they remain on the current fiber. That ensures that if a work-in-progress
// is aborted, the aborted updates are recovered by cloning from current.
//
// The work-in-progress queue is always a subset of the current queue.
//
// When the tree is committed, the work-in-progress becomes the current.


var _queue1 = void 0;
var _queue2 = void 0;

function comparePriority(a, b) {
  // When comparing update priorities, treat sync and Task work as equal.
  // TODO: Could we avoid the need for this by always coercing sync priority
  // to Task when scheduling an update?
  if ((a === TaskPriority || a === SynchronousPriority) && (b === TaskPriority || b === SynchronousPriority)) {
    return 0;
  }
  if (a === NoWork && b !== NoWork) {
    return -255;
  }
  if (a !== NoWork && b === NoWork) {
    return 255;
  }
  return a - b;
}

function createUpdateQueue() {
  var queue = {
    first: null,
    last: null,
    hasForceUpdate: false,
    callbackList: null
  };
  return queue;
}

function cloneUpdate(update) {
  return {
    priorityLevel: update.priorityLevel,
    partialState: update.partialState,
    callback: update.callback,
    isReplace: update.isReplace,
    isForced: update.isForced,
    isTopLevelUnmount: update.isTopLevelUnmount,
    next: null
  };
}

function insertUpdateIntoQueue(queue, update, insertAfter, insertBefore) {
  if (insertAfter !== null) {
    insertAfter.next = update;
  } else {
    // This is the first item in the queue.
    update.next = queue.first;
    queue.first = update;
  }

  if (insertBefore !== null) {
    update.next = insertBefore;
  } else {
    // This is the last item in the queue.
    queue.last = update;
  }
}

// Returns the update after which the incoming update should be inserted into
// the queue, or null if it should be inserted at beginning.
function findInsertionPosition(queue, update) {
  var priorityLevel = update.priorityLevel;
  var insertAfter = null;
  var insertBefore = null;
  if (queue.last !== null && comparePriority(queue.last.priorityLevel, priorityLevel) <= 0) {
    // Fast path for the common case where the update should be inserted at
    // the end of the queue.
    insertAfter = queue.last;
  } else {
    insertBefore = queue.first;
    while (insertBefore !== null && comparePriority(insertBefore.priorityLevel, priorityLevel) <= 0) {
      insertAfter = insertBefore;
      insertBefore = insertBefore.next;
    }
  }
  return insertAfter;
}

function ensureUpdateQueues(fiber) {
  var alternateFiber = fiber.alternate;

  var queue1 = fiber.updateQueue;
  if (queue1 === null) {
    queue1 = fiber.updateQueue = createUpdateQueue();
  }

  var queue2 = void 0;
  if (alternateFiber !== null) {
    queue2 = alternateFiber.updateQueue;
    if (queue2 === null) {
      queue2 = alternateFiber.updateQueue = createUpdateQueue();
    }
  } else {
    queue2 = null;
  }

  _queue1 = queue1;
  // Return null if there is no alternate queue, or if its queue is the same.
  _queue2 = queue2 !== queue1 ? queue2 : null;
}

// The work-in-progress queue is a subset of the current queue (if it exists).
// We need to insert the incoming update into both lists. However, it's possible
// that the correct position in one list will be different from the position in
// the other. Consider the following case:
//
//     Current:             3-5-6
//     Work-in-progress:        6
//
// Then we receive an update with priority 4 and insert it into each list:
//
//     Current:             3-4-5-6
//     Work-in-progress:        4-6
//
// In the current queue, the new update's `next` pointer points to the update
// with priority 5. But in the work-in-progress queue, the pointer points to the
// update with priority 6. Because these two queues share the same persistent
// data structure, this won't do. (This can only happen when the incoming update
// has higher priority than all the updates in the work-in-progress queue.)
//
// To solve this, in the case where the incoming update needs to be inserted
// into two different positions, we'll make a clone of the update and insert
// each copy into a separate queue. This forks the list while maintaining a
// persistent structure, because the update that is added to the work-in-progress
// is always added to the front of the list.
//
// However, if incoming update is inserted into the same position of both lists,
// we shouldn't make a copy.
//
// If the update is cloned, it returns the cloned update.
function insertUpdate(fiber, update) {
  // We'll have at least one and at most two distinct update queues.
  ensureUpdateQueues(fiber);
  var queue1 = _queue1;
  var queue2 = _queue2;

  // Warn if an update is scheduled from inside an updater function.
  var insertAfter1 = findInsertionPosition(queue1, update);
  var insertBefore1 = insertAfter1 !== null ? insertAfter1.next : queue1.first;

  if (queue2 === null) {
    // If there's no alternate queue, there's nothing else to do but insert.
    insertUpdateIntoQueue(queue1, update, insertAfter1, insertBefore1);
    return null;
  }

  // If there is an alternate queue, find the insertion position.
  var insertAfter2 = findInsertionPosition(queue2, update);
  var insertBefore2 = insertAfter2 !== null ? insertAfter2.next : queue2.first;

  // Now we can insert into the first queue. This must come after finding both
  // insertion positions because it mutates the list.
  insertUpdateIntoQueue(queue1, update, insertAfter1, insertBefore1);

  // See if the insertion positions are equal. Be careful to only compare
  // non-null values.
  if (insertBefore1 === insertBefore2 && insertBefore1 !== null || insertAfter1 === insertAfter2 && insertAfter1 !== null) {
    // The insertion positions are the same, so when we inserted into the first
    // queue, it also inserted into the alternate. All we need to do is update
    // the alternate queue's `first` and `last` pointers, in case they
    // have changed.
    if (insertAfter2 === null) {
      queue2.first = update;
    }
    if (insertBefore2 === null) {
      queue2.last = null;
    }
    return null;
  } else {
    // The insertion positions are different, so we need to clone the update and
    // insert the clone into the alternate queue.
    var update2 = cloneUpdate(update);
    insertUpdateIntoQueue(queue2, update2, insertAfter2, insertBefore2);
    return update2;
  }
}

function addUpdate(fiber, partialState, callback, priorityLevel) {
  var update = {
    priorityLevel: priorityLevel,
    partialState: partialState,
    callback: callback,
    isReplace: false,
    isForced: false,
    isTopLevelUnmount: false,
    next: null
  };
  insertUpdate(fiber, update);
}
var addUpdate_1 = addUpdate;

function addReplaceUpdate(fiber, state, callback, priorityLevel) {
  var update = {
    priorityLevel: priorityLevel,
    partialState: state,
    callback: callback,
    isReplace: true,
    isForced: false,
    isTopLevelUnmount: false,
    next: null
  };
  insertUpdate(fiber, update);
}
var addReplaceUpdate_1 = addReplaceUpdate;

function addForceUpdate(fiber, callback, priorityLevel) {
  var update = {
    priorityLevel: priorityLevel,
    partialState: null,
    callback: callback,
    isReplace: false,
    isForced: true,
    isTopLevelUnmount: false,
    next: null
  };
  insertUpdate(fiber, update);
}
var addForceUpdate_1 = addForceUpdate;

function getUpdatePriority(fiber) {
  var updateQueue = fiber.updateQueue;
  if (updateQueue === null) {
    return NoWork;
  }
  if (fiber.tag !== ClassComponent$1 && fiber.tag !== HostRoot$2) {
    return NoWork;
  }
  return updateQueue.first !== null ? updateQueue.first.priorityLevel : NoWork;
}
var getUpdatePriority_1 = getUpdatePriority;

function addTopLevelUpdate$1(fiber, partialState, callback, priorityLevel) {
  var isTopLevelUnmount = partialState.element === null;

  var update = {
    priorityLevel: priorityLevel,
    partialState: partialState,
    callback: callback,
    isReplace: false,
    isForced: false,
    isTopLevelUnmount: isTopLevelUnmount,
    next: null
  };
  var update2 = insertUpdate(fiber, update);

  if (isTopLevelUnmount) {
    // TODO: Redesign the top-level mount/update/unmount API to avoid this
    // special case.
    var queue1 = _queue1;
    var queue2 = _queue2;

    // Drop all updates that are lower-priority, so that the tree is not
    // remounted. We need to do this for both queues.
    if (queue1 !== null && update.next !== null) {
      update.next = null;
      queue1.last = update;
    }
    if (queue2 !== null && update2 !== null && update2.next !== null) {
      update2.next = null;
      queue2.last = update;
    }
  }
}
var addTopLevelUpdate_1 = addTopLevelUpdate$1;

function getStateFromUpdate(update, instance, prevState, props) {
  var partialState = update.partialState;
  if (typeof partialState === 'function') {
    var updateFn = partialState;
    return updateFn.call(instance, prevState, props);
  } else {
    return partialState;
  }
}

function beginUpdateQueue(current, workInProgress, queue, instance, prevState, props, priorityLevel) {
  if (current !== null && current.updateQueue === queue) {
    // We need to create a work-in-progress queue, by cloning the current queue.
    var currentQueue = queue;
    queue = workInProgress.updateQueue = {
      first: currentQueue.first,
      last: currentQueue.last,
      // These fields are no longer valid because they were already committed.
      // Reset them.
      callbackList: null,
      hasForceUpdate: false
    };
  }

  var callbackList = queue.callbackList;
  var hasForceUpdate = queue.hasForceUpdate;

  // Applies updates with matching priority to the previous state to create
  // a new state object.
  var state = prevState;
  var dontMutatePrevState = true;
  var update = queue.first;
  while (update !== null && comparePriority(update.priorityLevel, priorityLevel) <= 0) {
    // Remove each update from the queue right before it is processed. That way
    // if setState is called from inside an updater function, the new update
    // will be inserted in the correct position.
    queue.first = update.next;
    if (queue.first === null) {
      queue.last = null;
    }

    var _partialState = void 0;
    if (update.isReplace) {
      state = getStateFromUpdate(update, instance, state, props);
      dontMutatePrevState = true;
    } else {
      _partialState = getStateFromUpdate(update, instance, state, props);
      if (_partialState) {
        if (dontMutatePrevState) {
          state = assign({}, state, _partialState);
        } else {
          state = assign(state, _partialState);
        }
        dontMutatePrevState = false;
      }
    }
    if (update.isForced) {
      hasForceUpdate = true;
    }
    // Second condition ignores top-level unmount callbacks if they are not the
    // last update in the queue, since a subsequent update will cause a remount.
    if (update.callback !== null && !(update.isTopLevelUnmount && update.next !== null)) {
      callbackList = callbackList !== null ? callbackList : [];
      callbackList.push(update.callback);
      workInProgress.effectTag |= CallbackEffect;
    }
    update = update.next;
  }

  queue.callbackList = callbackList;
  queue.hasForceUpdate = hasForceUpdate;

  if (queue.first === null && callbackList === null && !hasForceUpdate) {
    // The queue is empty and there are no callbacks. We can reset it.
    workInProgress.updateQueue = null;
  }

  return state;
}
var beginUpdateQueue_1 = beginUpdateQueue;

function commitCallbacks(finishedWork, queue, context) {
  var callbackList = queue.callbackList;
  if (callbackList === null) {
    return;
  }

  // Set the list to null to make sure they don't get called more than once.
  queue.callbackList = null;

  for (var i = 0; i < callbackList.length; i++) {
    var _callback = callbackList[i];
    !(typeof _callback === 'function') ? reactProdInvariant_1('191', _callback) : void 0;
    _callback.call(context);
  }
}
var commitCallbacks_1 = commitCallbacks;

var ReactFiberUpdateQueue = {
	addUpdate: addUpdate_1,
	addReplaceUpdate: addReplaceUpdate_1,
	addForceUpdate: addForceUpdate_1,
	getUpdatePriority: getUpdatePriority_1,
	addTopLevelUpdate: addTopLevelUpdate_1,
	beginUpdateQueue: beginUpdateQueue_1,
	commitCallbacks: commitCallbacks_1
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

var emptyObject = {};

var emptyObject_1 = emptyObject;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactFiberStack
 * 
 */

var valueStack = [];

var index = -1;

var createCursor$1 = function (defaultValue) {
  return {
    current: defaultValue
  };
};

var isEmpty = function () {
  return index === -1;
};

var pop$1 = function (cursor, fiber) {
  if (index < 0) {
    return;
  }

  cursor.current = valueStack[index];

  valueStack[index] = null;

  index--;
};

var push$1 = function (cursor, value, fiber) {
  index++;

  valueStack[index] = cursor.current;

  cursor.current = value;
};

var reset = function () {
  while (index > -1) {
    valueStack[index] = null;

    index--;
  }
};

var ReactFiberStack = {
	createCursor: createCursor$1,
	isEmpty: isEmpty,
	pop: pop$1,
	push: push$1,
	reset: reset
};

var isFiberMounted$1 = ReactFiberTreeReflection.isFiberMounted;

var ClassComponent$2 = ReactTypeOfWork.ClassComponent;
var HostRoot$3 = ReactTypeOfWork.HostRoot;

var createCursor = ReactFiberStack.createCursor;
var pop = ReactFiberStack.pop;
var push = ReactFiberStack.push;

// A cursor to the current merged context object on the stack.
var contextStackCursor = createCursor(emptyObject_1);
// A cursor to a boolean indicating whether the context has changed.
var didPerformWorkStackCursor = createCursor(false);
// Keep track of the previous context object that was on the stack.
// We use this to get access to the parent context after we have already
// pushed the next context provider, and now need to merge their contexts.
var previousContext = emptyObject_1;

function getUnmaskedContext(workInProgress) {
  var hasOwnContext = isContextProvider$1(workInProgress);
  if (hasOwnContext) {
    // If the fiber is a context provider itself, when we read its context
    // we have already pushed its own child context on the stack. A context
    // provider should not "see" its own child context. Therefore we read the
    // previous (parent) context instead for a context provider.
    return previousContext;
  }
  return contextStackCursor.current;
}
var getUnmaskedContext_1 = getUnmaskedContext;

function cacheContext(workInProgress, unmaskedContext, maskedContext) {
  var instance = workInProgress.stateNode;
  instance.__reactInternalMemoizedUnmaskedChildContext = unmaskedContext;
  instance.__reactInternalMemoizedMaskedChildContext = maskedContext;
}
var cacheContext_1 = cacheContext;

var getMaskedContext = function (workInProgress, unmaskedContext) {
  var type = workInProgress.type;
  var contextTypes = type.contextTypes;
  if (!contextTypes) {
    return emptyObject_1;
  }

  // Avoid recreating masked context unless unmasked context has changed.
  // Failing to do this will result in unnecessary calls to componentWillReceiveProps.
  // This may trigger infinite loops if componentWillReceiveProps calls setState.
  var instance = workInProgress.stateNode;
  if (instance && instance.__reactInternalMemoizedUnmaskedChildContext === unmaskedContext) {
    return instance.__reactInternalMemoizedMaskedChildContext;
  }

  var context = {};
  for (var key in contextTypes) {
    context[key] = unmaskedContext[key];
  }

  if (instance) {
    cacheContext(workInProgress, unmaskedContext, context);
  }

  return context;
};

var hasContextChanged = function () {
  return didPerformWorkStackCursor.current;
};

function isContextConsumer(fiber) {
  return fiber.tag === ClassComponent$2 && fiber.type.contextTypes != null;
}
var isContextConsumer_1 = isContextConsumer;

function isContextProvider$1(fiber) {
  return fiber.tag === ClassComponent$2 && fiber.type.childContextTypes != null;
}
var isContextProvider_1 = isContextProvider$1;

function popContextProvider(fiber) {
  if (!isContextProvider$1(fiber)) {
    return;
  }

  pop(didPerformWorkStackCursor, fiber);
  pop(contextStackCursor, fiber);
}
var popContextProvider_1 = popContextProvider;

var popTopLevelContextObject = function (fiber) {
  pop(didPerformWorkStackCursor, fiber);
  pop(contextStackCursor, fiber);
};

var pushTopLevelContextObject = function (fiber, context, didChange) {
  !(contextStackCursor.cursor == null) ? reactProdInvariant_1('168') : void 0;

  push(contextStackCursor, context, fiber);
  push(didPerformWorkStackCursor, didChange, fiber);
};

function processChildContext$1(fiber, parentContext) {
  var instance = fiber.stateNode;
  var childContextTypes = fiber.type.childContextTypes;

  // TODO (bvaughn) Replace this behavior with an invariant() in the future.
  // It has only been added in Fiber to match the (unintentional) behavior in Stack.
  if (typeof instance.getChildContext !== 'function') {
    return parentContext;
  }

  var childContext = void 0;
  {
    childContext = instance.getChildContext();
  }
  for (var contextKey in childContext) {
    !(contextKey in childContextTypes) ? reactProdInvariant_1('108', getComponentName_1(fiber) || 'Unknown', contextKey) : void 0;
  }
  return assign({}, parentContext, childContext);
}
var processChildContext_1 = processChildContext$1;

var pushContextProvider = function (workInProgress) {
  if (!isContextProvider$1(workInProgress)) {
    return false;
  }

  var instance = workInProgress.stateNode;
  // We push the context as early as possible to ensure stack integrity.
  // If the instance does not exist yet, we will push null at first,
  // and replace it on the stack later when invalidating the context.
  var memoizedMergedChildContext = instance && instance.__reactInternalMemoizedMergedChildContext || emptyObject_1;

  // Remember the parent context so we can merge with it later.
  // Inherit the parent's did-perform-work value to avoid inadvertently blocking updates.
  previousContext = contextStackCursor.current;
  push(contextStackCursor, memoizedMergedChildContext, workInProgress);
  push(didPerformWorkStackCursor, didPerformWorkStackCursor.current, workInProgress);

  return true;
};

var invalidateContextProvider = function (workInProgress, didChange) {
  var instance = workInProgress.stateNode;
  !instance ? reactProdInvariant_1('169') : void 0;

  if (didChange) {
    // Merge parent and own context.
    // Skip this if we're not updating due to sCU.
    // This avoids unnecessarily recomputing memoized values.
    var mergedContext = processChildContext$1(workInProgress, previousContext);
    instance.__reactInternalMemoizedMergedChildContext = mergedContext;

    // Replace the old (or empty) context with the new one.
    // It is important to unwind the context in the reverse order.
    pop(didPerformWorkStackCursor, workInProgress);
    pop(contextStackCursor, workInProgress);
    // Now push the new context and mark that it has changed.
    push(contextStackCursor, mergedContext, workInProgress);
    push(didPerformWorkStackCursor, didChange, workInProgress);
  } else {
    pop(didPerformWorkStackCursor, workInProgress);
    push(didPerformWorkStackCursor, didChange, workInProgress);
  }
};

var resetContext = function () {
  previousContext = emptyObject_1;
  contextStackCursor.current = emptyObject_1;
  didPerformWorkStackCursor.current = false;
};

var findCurrentUnmaskedContext$1 = function (fiber) {
  // Currently this is only used with renderSubtreeIntoContainer; not sure if it
  // makes sense elsewhere
  !(isFiberMounted$1(fiber) && fiber.tag === ClassComponent$2) ? reactProdInvariant_1('170') : void 0;

  var node = fiber;
  while (node.tag !== HostRoot$3) {
    if (isContextProvider$1(node)) {
      return node.stateNode.__reactInternalMemoizedMergedChildContext;
    }
    var parent = node['return'];
    !parent ? reactProdInvariant_1('171') : void 0;
    node = parent;
  }
  return node.stateNode.context;
};

var ReactFiberContext = {
	getUnmaskedContext: getUnmaskedContext_1,
	cacheContext: cacheContext_1,
	getMaskedContext: getMaskedContext,
	hasContextChanged: hasContextChanged,
	isContextConsumer: isContextConsumer_1,
	isContextProvider: isContextProvider_1,
	popContextProvider: popContextProvider_1,
	popTopLevelContextObject: popTopLevelContextObject,
	pushTopLevelContextObject: pushTopLevelContextObject,
	processChildContext: processChildContext_1,
	pushContextProvider: pushContextProvider,
	invalidateContextProvider: invalidateContextProvider,
	resetContext: resetContext,
	findCurrentUnmaskedContext: findCurrentUnmaskedContext$1
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactTypeOfInternalContext
 * 
 */

var ReactTypeOfInternalContext = {
  NoContext: 0,
  AsyncUpdates: 1
};

var IndeterminateComponent = ReactTypeOfWork.IndeterminateComponent;
var ClassComponent$3 = ReactTypeOfWork.ClassComponent;
var HostRoot$4 = ReactTypeOfWork.HostRoot;
var HostComponent$3 = ReactTypeOfWork.HostComponent;
var HostText$2 = ReactTypeOfWork.HostText;
var HostPortal$1 = ReactTypeOfWork.HostPortal;
var CoroutineComponent = ReactTypeOfWork.CoroutineComponent;
var YieldComponent = ReactTypeOfWork.YieldComponent;
var Fragment = ReactTypeOfWork.Fragment;

var NoWork$1 = ReactPriorityLevel.NoWork;

var NoContext = ReactTypeOfInternalContext.NoContext;

var NoEffect$1 = ReactTypeOfSideEffect.NoEffect;



// A Fiber is work on a Component that needs to be done or was done. There can
// be more than one per component.


function FiberNode(tag, key, internalContextTag) {
  // Instance
  this.tag = tag;
  this.key = key;
  this.type = null;
  this.stateNode = null;

  // Fiber
  this['return'] = null;
  this.child = null;
  this.sibling = null;
  this.index = 0;

  this.ref = null;

  this.pendingProps = null;
  this.memoizedProps = null;
  this.updateQueue = null;
  this.memoizedState = null;

  this.internalContextTag = internalContextTag;

  // Effects
  this.effectTag = NoEffect$1;
  this.nextEffect = null;

  this.firstEffect = null;
  this.lastEffect = null;

  this.pendingWorkPriority = NoWork$1;

  this.alternate = null;

  
}

// This is a constructor function, rather than a POJO constructor, still
// please ensure we do the following:
// 1) Nobody should add any instance methods on this. Instance methods can be
//    more difficult to predict when they get optimized and they are almost
//    never inlined properly in static compilers.
// 2) Nobody should rely on `instanceof Fiber` for type testing. We should
//    always know when it is a fiber.
// 3) We might want to experiment with using numeric keys since they are easier
//    to optimize in a non-JIT environment.
// 4) We can easily go from a constructor to a createFiber object literal if that
//    is faster.
// 5) It should be easy to port this to a C struct and keep a C implementation
//    compatible.
var createFiber = function (tag, key, internalContextTag) {
  // $FlowFixMe: the shapes are exact here but Flow doesn't like constructors
  return new FiberNode(tag, key, internalContextTag);
};

function shouldConstruct(Component) {
  return !!(Component.prototype && Component.prototype.isReactComponent);
}

// This is used to create an alternate fiber to do work on.
var createWorkInProgress = function (current, renderPriority) {
  var workInProgress = current.alternate;
  if (workInProgress === null) {
    // We use a double buffering pooling technique because we know that we'll
    // only ever need at most two versions of a tree. We pool the "other" unused
    // node that we're free to reuse. This is lazily created to avoid allocating
    // extra objects for things that are never updated. It also allow us to
    // reclaim the extra memory if needed.
    workInProgress = createFiber(current.tag, current.key, current.internalContextTag);
    workInProgress.type = current.type;
    workInProgress.stateNode = current.stateNode;

    workInProgress.alternate = current;
    current.alternate = workInProgress;
  } else {
    // We already have an alternate.
    // Reset the effect tag.
    workInProgress.effectTag = NoEffect$1;

    // The effect list is no longer valid.
    workInProgress.nextEffect = null;
    workInProgress.firstEffect = null;
    workInProgress.lastEffect = null;
  }

  workInProgress.pendingWorkPriority = renderPriority;

  workInProgress.child = current.child;
  workInProgress.memoizedProps = current.memoizedProps;
  workInProgress.memoizedState = current.memoizedState;
  workInProgress.updateQueue = current.updateQueue;

  // pendingProps is set by the parent during reconciliation.
  // TODO: Pass this as an argument.

  // These will be overridden during the parent's reconciliation
  workInProgress.sibling = current.sibling;
  workInProgress.index = current.index;
  workInProgress.ref = current.ref;

  return workInProgress;
};

var createHostRootFiber$1 = function () {
  var fiber = createFiber(HostRoot$4, null, NoContext);
  return fiber;
};

var createFiberFromElement = function (element, internalContextTag, priorityLevel) {
  var owner = null;
  var fiber = createFiberFromElementType(element.type, element.key, internalContextTag, owner);
  fiber.pendingProps = element.props;
  fiber.pendingWorkPriority = priorityLevel;

  return fiber;
};

var createFiberFromFragment = function (elements, internalContextTag, priorityLevel) {
  // TODO: Consider supporting keyed fragments. Technically, we accidentally
  // support that in the existing React.
  var fiber = createFiber(Fragment, null, internalContextTag);
  fiber.pendingProps = elements;
  fiber.pendingWorkPriority = priorityLevel;
  return fiber;
};

var createFiberFromText = function (content, internalContextTag, priorityLevel) {
  var fiber = createFiber(HostText$2, null, internalContextTag);
  fiber.pendingProps = content;
  fiber.pendingWorkPriority = priorityLevel;
  return fiber;
};

function createFiberFromElementType(type, key, internalContextTag, debugOwner) {
  var fiber = void 0;
  if (typeof type === 'function') {
    fiber = shouldConstruct(type) ? createFiber(ClassComponent$3, key, internalContextTag) : createFiber(IndeterminateComponent, key, internalContextTag);
    fiber.type = type;
  } else if (typeof type === 'string') {
    fiber = createFiber(HostComponent$3, key, internalContextTag);
    fiber.type = type;
  } else if (typeof type === 'object' && type !== null && typeof type.tag === 'number') {
    // Currently assumed to be a continuation and therefore is a fiber already.
    // TODO: The yield system is currently broken for updates in some cases.
    // The reified yield stores a fiber, but we don't know which fiber that is;
    // the current or a workInProgress? When the continuation gets rendered here
    // we don't know if we can reuse that fiber or if we need to clone it.
    // There is probably a clever way to restructure this.
    fiber = type;
  } else {
    var info = '';
    reactProdInvariant_1('130', type == null ? type : typeof type, info);
  }
  return fiber;
}

var createFiberFromElementType_1 = createFiberFromElementType;

var createFiberFromHostInstanceForDeletion = function () {
  var fiber = createFiber(HostComponent$3, null, NoContext);
  fiber.type = 'DELETED';
  return fiber;
};

var createFiberFromCoroutine = function (coroutine, internalContextTag, priorityLevel) {
  var fiber = createFiber(CoroutineComponent, coroutine.key, internalContextTag);
  fiber.type = coroutine.handler;
  fiber.pendingProps = coroutine;
  fiber.pendingWorkPriority = priorityLevel;
  return fiber;
};

var createFiberFromYield = function (yieldNode, internalContextTag, priorityLevel) {
  var fiber = createFiber(YieldComponent, null, internalContextTag);
  return fiber;
};

var createFiberFromPortal = function (portal, internalContextTag, priorityLevel) {
  var fiber = createFiber(HostPortal$1, portal.key, internalContextTag);
  fiber.pendingProps = portal.children || [];
  fiber.pendingWorkPriority = priorityLevel;
  fiber.stateNode = {
    containerInfo: portal.containerInfo,
    implementation: portal.implementation
  };
  return fiber;
};

var largerPriority = function (p1, p2) {
  return p1 !== NoWork$1 && (p2 === NoWork$1 || p2 > p1) ? p1 : p2;
};

var ReactFiber = {
	createWorkInProgress: createWorkInProgress,
	createHostRootFiber: createHostRootFiber$1,
	createFiberFromElement: createFiberFromElement,
	createFiberFromFragment: createFiberFromFragment,
	createFiberFromText: createFiberFromText,
	createFiberFromElementType: createFiberFromElementType_1,
	createFiberFromHostInstanceForDeletion: createFiberFromHostInstanceForDeletion,
	createFiberFromCoroutine: createFiberFromCoroutine,
	createFiberFromYield: createFiberFromYield,
	createFiberFromPortal: createFiberFromPortal,
	largerPriority: largerPriority
};

var createHostRootFiber = ReactFiber.createHostRootFiber;

var createFiberRoot$1 = function (containerInfo) {
  // Cyclic construction. This cheats the type system right now because
  // stateNode is any.
  var uninitializedFiber = createHostRootFiber();
  var root = {
    current: uninitializedFiber,
    containerInfo: containerInfo,
    isScheduled: false,
    nextScheduledRoot: null,
    context: null,
    pendingContext: null
  };
  uninitializedFiber.stateNode = root;
  return root;
};

var ReactFiberRoot = {
	createFiberRoot: createFiberRoot$1
};

/**
 * Copyright (c) 2016-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 * @providesModule describeComponentFrame
 */

var describeComponentFrame = function (name, source, ownerName) {
  return '\n    in ' + (name || 'Unknown') + (source ? ' (at ' + source.fileName.replace(/^.*[\\\/]/, '') + ':' + source.lineNumber + ')' : ownerName ? ' (created by ' + ownerName + ')' : '');
};

var IndeterminateComponent$1 = ReactTypeOfWork.IndeterminateComponent;
var FunctionalComponent = ReactTypeOfWork.FunctionalComponent;
var ClassComponent$5 = ReactTypeOfWork.ClassComponent;
var HostComponent$5 = ReactTypeOfWork.HostComponent;




function describeFiber(fiber) {
  switch (fiber.tag) {
    case IndeterminateComponent$1:
    case FunctionalComponent:
    case ClassComponent$5:
    case HostComponent$5:
      var owner = fiber._debugOwner;
      var source = fiber._debugSource;
      var name = getComponentName_1(fiber);
      var ownerName = null;
      if (owner) {
        ownerName = getComponentName_1(owner);
      }
      return describeComponentFrame(name, source, ownerName);
    default:
      return '';
  }
}

// This function can only be called with a work-in-progress fiber and
// only during begin or complete phase. Do not call it under any other
// circumstances.
function getStackAddendumByWorkInProgressFiber$2(workInProgress) {
  var info = '';
  var node = workInProgress;
  do {
    info += describeFiber(node);
    // Otherwise this return pointer might point to the wrong tree:
    node = node['return'];
  } while (node);
  return info;
}

var ReactFiberComponentTreeHook = {
  getStackAddendumByWorkInProgressFiber: getStackAddendumByWorkInProgressFiber$2
};

var defaultShowDialog = function (capturedError) {
  return true;
};

var showDialog = defaultShowDialog;

function logCapturedError$1(capturedError) {
  var logError = showDialog(capturedError);

  // Allow injected showDialog() to prevent default console.error logging.
  // This enables renderers like ReactNative to better manage redbox behavior.
  if (logError === false) {
    return;
  }

  var error = capturedError.error;
  {
    // In production, we print the error directly.
    // This will include the message, the JS stack, and anything the browser wants to show.
    // We pass the error object instead of custom message so that the browser displays the error natively.
    console.error(error);
  }
}

var injection$1 = {
  /**
   * Display custom dialog for lifecycle errors.
   * Return false to prevent default behavior of logging to console.error.
   */
  injectDialog: function (fn) {
    !(showDialog === defaultShowDialog) ? reactProdInvariant_1('172') : void 0;
    !(typeof fn === 'function') ? reactProdInvariant_1('173') : void 0;
    showDialog = fn;
  }
};

var logCapturedError_1 = logCapturedError$1;

var ReactFiberErrorLogger = {
	injection: injection$1,
	logCapturedError: logCapturedError_1
};

/**
 * Copyright (c) 2014-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactCoroutine
 * 
 */

// The Symbol used to tag the special React types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_COROUTINE_TYPE$1;
var REACT_YIELD_TYPE$1;
if (typeof Symbol === 'function' && Symbol['for']) {
  REACT_COROUTINE_TYPE$1 = Symbol['for']('react.coroutine');
  REACT_YIELD_TYPE$1 = Symbol['for']('react.yield');
} else {
  REACT_COROUTINE_TYPE$1 = 0xeac8;
  REACT_YIELD_TYPE$1 = 0xeac9;
}

var createCoroutine = function (children, handler, props) {
  var key = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;

  var coroutine = {
    // This tag allow us to uniquely identify this as a React Coroutine
    $$typeof: REACT_COROUTINE_TYPE$1,
    key: key == null ? null : '' + key,
    children: children,
    handler: handler,
    props: props
  };

  return coroutine;
};

var createYield = function (value) {
  var yieldNode = {
    // This tag allow us to uniquely identify this as a React Yield
    $$typeof: REACT_YIELD_TYPE$1,
    value: value
  };

  return yieldNode;
};

/**
 * Verifies the object is a coroutine object.
 */
var isCoroutine = function (object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_COROUTINE_TYPE$1;
};

/**
 * Verifies the object is a yield object.
 */
var isYield = function (object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_YIELD_TYPE$1;
};

var REACT_YIELD_TYPE_1 = REACT_YIELD_TYPE$1;
var REACT_COROUTINE_TYPE_1 = REACT_COROUTINE_TYPE$1;

var ReactCoroutine = {
	createCoroutine: createCoroutine,
	createYield: createYield,
	isCoroutine: isCoroutine,
	isYield: isYield,
	REACT_YIELD_TYPE: REACT_YIELD_TYPE_1,
	REACT_COROUTINE_TYPE: REACT_COROUTINE_TYPE_1
};

/**
 * Copyright (c) 2014-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactPortal
 * 
 */

// The Symbol used to tag the special React types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_PORTAL_TYPE$1 = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.portal') || 0xeaca;

var createPortal$1 = function (children, containerInfo,
// TODO: figure out the API for cross-renderer implementation.
implementation) {
  var key = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;

  return {
    // This tag allow us to uniquely identify this as a React Portal
    $$typeof: REACT_PORTAL_TYPE$1,
    key: key == null ? null : '' + key,
    children: children,
    containerInfo: containerInfo,
    implementation: implementation
  };
};

/**
 * Verifies the object is a portal object.
 */
var isPortal = function (object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_PORTAL_TYPE$1;
};

var REACT_PORTAL_TYPE_1 = REACT_PORTAL_TYPE$1;

var ReactPortal = {
	createPortal: createPortal$1,
	isPortal: isPortal,
	REACT_PORTAL_TYPE: REACT_PORTAL_TYPE_1
};

var REACT_COROUTINE_TYPE = ReactCoroutine.REACT_COROUTINE_TYPE;
var REACT_YIELD_TYPE = ReactCoroutine.REACT_YIELD_TYPE;

var REACT_PORTAL_TYPE = ReactPortal.REACT_PORTAL_TYPE;








var createWorkInProgress$2 = ReactFiber.createWorkInProgress;
var createFiberFromElement$1 = ReactFiber.createFiberFromElement;
var createFiberFromFragment$1 = ReactFiber.createFiberFromFragment;
var createFiberFromText$1 = ReactFiber.createFiberFromText;
var createFiberFromCoroutine$1 = ReactFiber.createFiberFromCoroutine;
var createFiberFromYield$1 = ReactFiber.createFiberFromYield;
var createFiberFromPortal$1 = ReactFiber.createFiberFromPortal;


var isArray = Array.isArray;

var FunctionalComponent$2 = ReactTypeOfWork.FunctionalComponent;
var ClassComponent$7 = ReactTypeOfWork.ClassComponent;
var HostText$4 = ReactTypeOfWork.HostText;
var HostPortal$4 = ReactTypeOfWork.HostPortal;
var CoroutineComponent$2 = ReactTypeOfWork.CoroutineComponent;
var YieldComponent$2 = ReactTypeOfWork.YieldComponent;
var Fragment$2 = ReactTypeOfWork.Fragment;
var NoEffect$2 = ReactTypeOfSideEffect.NoEffect;
var Placement$3 = ReactTypeOfSideEffect.Placement;
var Deletion$1 = ReactTypeOfSideEffect.Deletion;


var ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
var FAUX_ITERATOR_SYMBOL = '@@iterator'; // Before Symbol spec.
// The Symbol used to tag the ReactElement type. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_ELEMENT_TYPE = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.element') || 0xeac7;

function getIteratorFn(maybeIterable) {
  if (maybeIterable === null || typeof maybeIterable === 'undefined') {
    return null;
  }
  var iteratorFn = ITERATOR_SYMBOL && maybeIterable[ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL];
  if (typeof iteratorFn === 'function') {
    return iteratorFn;
  }
  return null;
}

function coerceRef(current, element) {
  var mixedRef = element.ref;
  if (mixedRef !== null && typeof mixedRef !== 'function') {
    if (element._owner) {
      var owner = element._owner;
      var inst = void 0;
      if (owner) {
        var ownerFiber = owner;
        !(ownerFiber.tag === ClassComponent$7) ? reactProdInvariant_1('110') : void 0;
        inst = ownerFiber.stateNode;
      }
      !inst ? reactProdInvariant_1('147', mixedRef) : void 0;
      var stringRef = '' + mixedRef;
      // Check if previous string ref matches new string ref
      if (current !== null && current.ref !== null && current.ref._stringRef === stringRef) {
        return current.ref;
      }
      var ref = function (value) {
        var refs = inst.refs === emptyObject_1 ? inst.refs = {} : inst.refs;
        if (value === null) {
          delete refs[stringRef];
        } else {
          refs[stringRef] = value;
        }
      };
      ref._stringRef = stringRef;
      return ref;
    } else {
      !(typeof mixedRef === 'string') ? reactProdInvariant_1('148') : void 0;
      !element._owner ? reactProdInvariant_1('149', mixedRef) : void 0;
    }
  }
  return mixedRef;
}

function throwOnInvalidObjectType(returnFiber, newChild) {
  if (returnFiber.type !== 'textarea') {
    var addendum = '';
    reactProdInvariant_1('31', Object.prototype.toString.call(newChild) === '[object Object]' ? 'object with keys {' + Object.keys(newChild).join(', ') + '}' : newChild, addendum);
  }
}

// This wrapper function exists because I expect to clone the code in each path
// to be able to optimize each path individually by branching early. This needs
// a compiler or we can do it manually. Helpers that don't need this branching
// live outside of this function.
function ChildReconciler(shouldClone, shouldTrackSideEffects) {
  function deleteChild(returnFiber, childToDelete) {
    if (!shouldTrackSideEffects) {
      // Noop.
      return;
    }
    if (!shouldClone) {
      // When we're reconciling in place we have a work in progress copy. We
      // actually want the current copy. If there is no current copy, then we
      // don't need to track deletion side-effects.
      if (childToDelete.alternate === null) {
        return;
      }
      childToDelete = childToDelete.alternate;
    }
    // Deletions are added in reversed order so we add it to the front.
    // At this point, the return fiber's effect list is empty except for
    // deletions, so we can just append the deletion to the list. The remaining
    // effects aren't added until the complete phase. Once we implement
    // resuming, this may not be true.
    var last = returnFiber.lastEffect;
    if (last !== null) {
      last.nextEffect = childToDelete;
      returnFiber.lastEffect = childToDelete;
    } else {
      returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;
    }
    childToDelete.nextEffect = null;
    childToDelete.effectTag = Deletion$1;
  }

  function deleteRemainingChildren(returnFiber, currentFirstChild) {
    if (!shouldTrackSideEffects) {
      // Noop.
      return null;
    }

    // TODO: For the shouldClone case, this could be micro-optimized a bit by
    // assuming that after the first child we've already added everything.
    var childToDelete = currentFirstChild;
    while (childToDelete !== null) {
      deleteChild(returnFiber, childToDelete);
      childToDelete = childToDelete.sibling;
    }
    return null;
  }

  function mapRemainingChildren(returnFiber, currentFirstChild) {
    // Add the remaining children to a temporary map so that we can find them by
    // keys quickly. Implicit (null) keys get added to this set with their index
    var existingChildren = new Map();

    var existingChild = currentFirstChild;
    while (existingChild !== null) {
      if (existingChild.key !== null) {
        existingChildren.set(existingChild.key, existingChild);
      } else {
        existingChildren.set(existingChild.index, existingChild);
      }
      existingChild = existingChild.sibling;
    }
    return existingChildren;
  }

  function useFiber(fiber, priority) {
    // We currently set sibling to null and index to 0 here because it is easy
    // to forget to do before returning it. E.g. for the single child case.
    if (shouldClone) {
      var clone = createWorkInProgress$2(fiber, priority);
      clone.index = 0;
      clone.sibling = null;
      return clone;
    } else {
      // We override the pending priority even if it is higher, because if
      // we're reconciling at a lower priority that means that this was
      // down-prioritized.
      fiber.pendingWorkPriority = priority;
      fiber.effectTag = NoEffect$2;
      fiber.index = 0;
      fiber.sibling = null;
      return fiber;
    }
  }

  function placeChild(newFiber, lastPlacedIndex, newIndex) {
    newFiber.index = newIndex;
    if (!shouldTrackSideEffects) {
      // Noop.
      return lastPlacedIndex;
    }
    var current = newFiber.alternate;
    if (current !== null) {
      var oldIndex = current.index;
      if (oldIndex < lastPlacedIndex) {
        // This is a move.
        newFiber.effectTag = Placement$3;
        return lastPlacedIndex;
      } else {
        // This item can stay in place.
        return oldIndex;
      }
    } else {
      // This is an insertion.
      newFiber.effectTag = Placement$3;
      return lastPlacedIndex;
    }
  }

  function placeSingleChild(newFiber) {
    // This is simpler for the single child case. We only need to do a
    // placement for inserting new children.
    if (shouldTrackSideEffects && newFiber.alternate === null) {
      newFiber.effectTag = Placement$3;
    }
    return newFiber;
  }

  function updateTextNode(returnFiber, current, textContent, priority) {
    if (current === null || current.tag !== HostText$4) {
      // Insert
      var created = createFiberFromText$1(textContent, returnFiber.internalContextTag, priority);
      created['return'] = returnFiber;
      return created;
    } else {
      // Update
      var existing = useFiber(current, priority);
      existing.pendingProps = textContent;
      existing['return'] = returnFiber;
      return existing;
    }
  }

  function updateElement(returnFiber, current, element, priority) {
    if (current === null || current.type !== element.type) {
      // Insert
      var created = createFiberFromElement$1(element, returnFiber.internalContextTag, priority);
      created.ref = coerceRef(current, element);
      created['return'] = returnFiber;
      return created;
    } else {
      // Move based on index
      var existing = useFiber(current, priority);
      existing.ref = coerceRef(current, element);
      existing.pendingProps = element.props;
      existing['return'] = returnFiber;
      return existing;
    }
  }

  function updateCoroutine(returnFiber, current, coroutine, priority) {
    // TODO: Should this also compare handler to determine whether to reuse?
    if (current === null || current.tag !== CoroutineComponent$2) {
      // Insert
      var created = createFiberFromCoroutine$1(coroutine, returnFiber.internalContextTag, priority);
      created['return'] = returnFiber;
      return created;
    } else {
      // Move based on index
      var existing = useFiber(current, priority);
      existing.pendingProps = coroutine;
      existing['return'] = returnFiber;
      return existing;
    }
  }

  function updateYield(returnFiber, current, yieldNode, priority) {
    if (current === null || current.tag !== YieldComponent$2) {
      // Insert
      var created = createFiberFromYield$1(yieldNode, returnFiber.internalContextTag, priority);
      created.type = yieldNode.value;
      created['return'] = returnFiber;
      return created;
    } else {
      // Move based on index
      var existing = useFiber(current, priority);
      existing.type = yieldNode.value;
      existing['return'] = returnFiber;
      return existing;
    }
  }

  function updatePortal(returnFiber, current, portal, priority) {
    if (current === null || current.tag !== HostPortal$4 || current.stateNode.containerInfo !== portal.containerInfo || current.stateNode.implementation !== portal.implementation) {
      // Insert
      var created = createFiberFromPortal$1(portal, returnFiber.internalContextTag, priority);
      created['return'] = returnFiber;
      return created;
    } else {
      // Update
      var existing = useFiber(current, priority);
      existing.pendingProps = portal.children || [];
      existing['return'] = returnFiber;
      return existing;
    }
  }

  function updateFragment(returnFiber, current, fragment, priority) {
    if (current === null || current.tag !== Fragment$2) {
      // Insert
      var created = createFiberFromFragment$1(fragment, returnFiber.internalContextTag, priority);
      created['return'] = returnFiber;
      return created;
    } else {
      // Update
      var existing = useFiber(current, priority);
      existing.pendingProps = fragment;
      existing['return'] = returnFiber;
      return existing;
    }
  }

  function createChild(returnFiber, newChild, priority) {
    if (typeof newChild === 'string' || typeof newChild === 'number') {
      // Text nodes doesn't have keys. If the previous node is implicitly keyed
      // we can continue to replace it without aborting even if it is not a text
      // node.
      var created = createFiberFromText$1('' + newChild, returnFiber.internalContextTag, priority);
      created['return'] = returnFiber;
      return created;
    }

    if (typeof newChild === 'object' && newChild !== null) {
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          {
            var _created = createFiberFromElement$1(newChild, returnFiber.internalContextTag, priority);
            _created.ref = coerceRef(null, newChild);
            _created['return'] = returnFiber;
            return _created;
          }

        case REACT_COROUTINE_TYPE:
          {
            var _created2 = createFiberFromCoroutine$1(newChild, returnFiber.internalContextTag, priority);
            _created2['return'] = returnFiber;
            return _created2;
          }

        case REACT_YIELD_TYPE:
          {
            var _created3 = createFiberFromYield$1(newChild, returnFiber.internalContextTag, priority);
            _created3.type = newChild.value;
            _created3['return'] = returnFiber;
            return _created3;
          }

        case REACT_PORTAL_TYPE:
          {
            var _created4 = createFiberFromPortal$1(newChild, returnFiber.internalContextTag, priority);
            _created4['return'] = returnFiber;
            return _created4;
          }
      }

      if (isArray(newChild) || getIteratorFn(newChild)) {
        var _created5 = createFiberFromFragment$1(newChild, returnFiber.internalContextTag, priority);
        _created5['return'] = returnFiber;
        return _created5;
      }

      throwOnInvalidObjectType(returnFiber, newChild);
    }

    return null;
  }

  function updateSlot(returnFiber, oldFiber, newChild, priority) {
    // Update the fiber if the keys match, otherwise return null.

    var key = oldFiber !== null ? oldFiber.key : null;

    if (typeof newChild === 'string' || typeof newChild === 'number') {
      // Text nodes doesn't have keys. If the previous node is implicitly keyed
      // we can continue to replace it without aborting even if it is not a text
      // node.
      if (key !== null) {
        return null;
      }
      return updateTextNode(returnFiber, oldFiber, '' + newChild, priority);
    }

    if (typeof newChild === 'object' && newChild !== null) {
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          {
            if (newChild.key === key) {
              return updateElement(returnFiber, oldFiber, newChild, priority);
            } else {
              return null;
            }
          }

        case REACT_COROUTINE_TYPE:
          {
            if (newChild.key === key) {
              return updateCoroutine(returnFiber, oldFiber, newChild, priority);
            } else {
              return null;
            }
          }

        case REACT_YIELD_TYPE:
          {
            // Yields doesn't have keys. If the previous node is implicitly keyed
            // we can continue to replace it without aborting even if it is not a
            // yield.
            if (key === null) {
              return updateYield(returnFiber, oldFiber, newChild, priority);
            } else {
              return null;
            }
          }

        case REACT_PORTAL_TYPE:
          {
            if (newChild.key === key) {
              return updatePortal(returnFiber, oldFiber, newChild, priority);
            } else {
              return null;
            }
          }
      }

      if (isArray(newChild) || getIteratorFn(newChild)) {
        // Fragments doesn't have keys so if the previous key is implicit we can
        // update it.
        if (key !== null) {
          return null;
        }
        return updateFragment(returnFiber, oldFiber, newChild, priority);
      }

      throwOnInvalidObjectType(returnFiber, newChild);
    }

    return null;
  }

  function updateFromMap(existingChildren, returnFiber, newIdx, newChild, priority) {
    if (typeof newChild === 'string' || typeof newChild === 'number') {
      // Text nodes doesn't have keys, so we neither have to check the old nor
      // new node for the key. If both are text nodes, they match.
      var matchedFiber = existingChildren.get(newIdx) || null;
      return updateTextNode(returnFiber, matchedFiber, '' + newChild, priority);
    }

    if (typeof newChild === 'object' && newChild !== null) {
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          {
            var _matchedFiber = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;
            return updateElement(returnFiber, _matchedFiber, newChild, priority);
          }

        case REACT_COROUTINE_TYPE:
          {
            var _matchedFiber2 = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;
            return updateCoroutine(returnFiber, _matchedFiber2, newChild, priority);
          }

        case REACT_YIELD_TYPE:
          {
            // Yields doesn't have keys, so we neither have to check the old nor
            // new node for the key. If both are yields, they match.
            var _matchedFiber3 = existingChildren.get(newIdx) || null;
            return updateYield(returnFiber, _matchedFiber3, newChild, priority);
          }

        case REACT_PORTAL_TYPE:
          {
            var _matchedFiber4 = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;
            return updatePortal(returnFiber, _matchedFiber4, newChild, priority);
          }
      }

      if (isArray(newChild) || getIteratorFn(newChild)) {
        var _matchedFiber5 = existingChildren.get(newIdx) || null;
        return updateFragment(returnFiber, _matchedFiber5, newChild, priority);
      }

      throwOnInvalidObjectType(returnFiber, newChild);
    }

    return null;
  }

  /**
   * Warns if there is a duplicate or missing key
   */
  function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren, priority) {
    // This algorithm can't optimize by searching from boths ends since we
    // don't have backpointers on fibers. I'm trying to see how far we can get
    // with that model. If it ends up not being worth the tradeoffs, we can
    // add it later.

    // Even with a two ended optimization, we'd want to optimize for the case
    // where there are few changes and brute force the comparison instead of
    // going for the Map. It'd like to explore hitting that path first in
    // forward-only mode and only go for the Map once we notice that we need
    // lots of look ahead. This doesn't handle reversal as well as two ended
    // search but that's unusual. Besides, for the two ended optimization to
    // work on Iterables, we'd need to copy the whole set.

    // In this first iteration, we'll just live with hitting the bad case
    // (adding everything to a Map) in for every insert/move.

    // If you change this code, also update reconcileChildrenIterator() which
    // uses the same algorithm.

    var resultingFirstChild = null;
    var previousNewFiber = null;

    var oldFiber = currentFirstChild;
    var lastPlacedIndex = 0;
    var newIdx = 0;
    var nextOldFiber = null;
    for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {
      if (oldFiber.index > newIdx) {
        nextOldFiber = oldFiber;
        oldFiber = null;
      } else {
        nextOldFiber = oldFiber.sibling;
      }
      var newFiber = updateSlot(returnFiber, oldFiber, newChildren[newIdx], priority);
      if (newFiber === null) {
        // TODO: This breaks on empty slots like null children. That's
        // unfortunate because it triggers the slow path all the time. We need
        // a better way to communicate whether this was a miss or null,
        // boolean, undefined, etc.
        if (oldFiber === null) {
          oldFiber = nextOldFiber;
        }
        break;
      }
      if (shouldTrackSideEffects) {
        if (oldFiber && newFiber.alternate === null) {
          // We matched the slot, but we didn't reuse the existing fiber, so we
          // need to delete the existing child.
          deleteChild(returnFiber, oldFiber);
        }
      }
      lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);
      if (previousNewFiber === null) {
        // TODO: Move out of the loop. This only happens for the first run.
        resultingFirstChild = newFiber;
      } else {
        // TODO: Defer siblings if we're not at the right index for this slot.
        // I.e. if we had null values before, then we want to defer this
        // for each null value. However, we also don't want to call updateSlot
        // with the previous one.
        previousNewFiber.sibling = newFiber;
      }
      previousNewFiber = newFiber;
      oldFiber = nextOldFiber;
    }

    if (newIdx === newChildren.length) {
      // We've reached the end of the new children. We can delete the rest.
      deleteRemainingChildren(returnFiber, oldFiber);
      return resultingFirstChild;
    }

    if (oldFiber === null) {
      // If we don't have any more existing children we can choose a fast path
      // since the rest will all be insertions.
      for (; newIdx < newChildren.length; newIdx++) {
        var _newFiber = createChild(returnFiber, newChildren[newIdx], priority);
        if (!_newFiber) {
          continue;
        }
        lastPlacedIndex = placeChild(_newFiber, lastPlacedIndex, newIdx);
        if (previousNewFiber === null) {
          // TODO: Move out of the loop. This only happens for the first run.
          resultingFirstChild = _newFiber;
        } else {
          previousNewFiber.sibling = _newFiber;
        }
        previousNewFiber = _newFiber;
      }
      return resultingFirstChild;
    }

    // Add all children to a key map for quick lookups.
    var existingChildren = mapRemainingChildren(returnFiber, oldFiber);

    // Keep scanning and use the map to restore deleted items as moves.
    for (; newIdx < newChildren.length; newIdx++) {
      var _newFiber2 = updateFromMap(existingChildren, returnFiber, newIdx, newChildren[newIdx], priority);
      if (_newFiber2) {
        if (shouldTrackSideEffects) {
          if (_newFiber2.alternate !== null) {
            // The new fiber is a work in progress, but if there exists a
            // current, that means that we reused the fiber. We need to delete
            // it from the child list so that we don't add it to the deletion
            // list.
            existingChildren['delete'](_newFiber2.key === null ? newIdx : _newFiber2.key);
          }
        }
        lastPlacedIndex = placeChild(_newFiber2, lastPlacedIndex, newIdx);
        if (previousNewFiber === null) {
          resultingFirstChild = _newFiber2;
        } else {
          previousNewFiber.sibling = _newFiber2;
        }
        previousNewFiber = _newFiber2;
      }
    }

    if (shouldTrackSideEffects) {
      // Any existing children that weren't consumed above were deleted. We need
      // to add them to the deletion list.
      existingChildren.forEach(function (child) {
        return deleteChild(returnFiber, child);
      });
    }

    return resultingFirstChild;
  }

  function reconcileChildrenIterator(returnFiber, currentFirstChild, newChildrenIterable, priority) {
    // This is the same implementation as reconcileChildrenArray(),
    // but using the iterator instead.

    var iteratorFn = getIteratorFn(newChildrenIterable);
    !(typeof iteratorFn === 'function') ? reactProdInvariant_1('150') : void 0;

    var newChildren = iteratorFn.call(newChildrenIterable);
    !(newChildren != null) ? reactProdInvariant_1('151') : void 0;

    var resultingFirstChild = null;
    var previousNewFiber = null;

    var oldFiber = currentFirstChild;
    var lastPlacedIndex = 0;
    var newIdx = 0;
    var nextOldFiber = null;

    var step = newChildren.next();
    for (; oldFiber !== null && !step.done; newIdx++, step = newChildren.next()) {
      if (oldFiber.index > newIdx) {
        nextOldFiber = oldFiber;
        oldFiber = null;
      } else {
        nextOldFiber = oldFiber.sibling;
      }
      var newFiber = updateSlot(returnFiber, oldFiber, step.value, priority);
      if (newFiber === null) {
        // TODO: This breaks on empty slots like null children. That's
        // unfortunate because it triggers the slow path all the time. We need
        // a better way to communicate whether this was a miss or null,
        // boolean, undefined, etc.
        if (!oldFiber) {
          oldFiber = nextOldFiber;
        }
        break;
      }
      if (shouldTrackSideEffects) {
        if (oldFiber && newFiber.alternate === null) {
          // We matched the slot, but we didn't reuse the existing fiber, so we
          // need to delete the existing child.
          deleteChild(returnFiber, oldFiber);
        }
      }
      lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);
      if (previousNewFiber === null) {
        // TODO: Move out of the loop. This only happens for the first run.
        resultingFirstChild = newFiber;
      } else {
        // TODO: Defer siblings if we're not at the right index for this slot.
        // I.e. if we had null values before, then we want to defer this
        // for each null value. However, we also don't want to call updateSlot
        // with the previous one.
        previousNewFiber.sibling = newFiber;
      }
      previousNewFiber = newFiber;
      oldFiber = nextOldFiber;
    }

    if (step.done) {
      // We've reached the end of the new children. We can delete the rest.
      deleteRemainingChildren(returnFiber, oldFiber);
      return resultingFirstChild;
    }

    if (oldFiber === null) {
      // If we don't have any more existing children we can choose a fast path
      // since the rest will all be insertions.
      for (; !step.done; newIdx++, step = newChildren.next()) {
        var _newFiber3 = createChild(returnFiber, step.value, priority);
        if (_newFiber3 === null) {
          continue;
        }
        lastPlacedIndex = placeChild(_newFiber3, lastPlacedIndex, newIdx);
        if (previousNewFiber === null) {
          // TODO: Move out of the loop. This only happens for the first run.
          resultingFirstChild = _newFiber3;
        } else {
          previousNewFiber.sibling = _newFiber3;
        }
        previousNewFiber = _newFiber3;
      }
      return resultingFirstChild;
    }

    // Add all children to a key map for quick lookups.
    var existingChildren = mapRemainingChildren(returnFiber, oldFiber);

    // Keep scanning and use the map to restore deleted items as moves.
    for (; !step.done; newIdx++, step = newChildren.next()) {
      var _newFiber4 = updateFromMap(existingChildren, returnFiber, newIdx, step.value, priority);
      if (_newFiber4 !== null) {
        if (shouldTrackSideEffects) {
          if (_newFiber4.alternate !== null) {
            // The new fiber is a work in progress, but if there exists a
            // current, that means that we reused the fiber. We need to delete
            // it from the child list so that we don't add it to the deletion
            // list.
            existingChildren['delete'](_newFiber4.key === null ? newIdx : _newFiber4.key);
          }
        }
        lastPlacedIndex = placeChild(_newFiber4, lastPlacedIndex, newIdx);
        if (previousNewFiber === null) {
          resultingFirstChild = _newFiber4;
        } else {
          previousNewFiber.sibling = _newFiber4;
        }
        previousNewFiber = _newFiber4;
      }
    }

    if (shouldTrackSideEffects) {
      // Any existing children that weren't consumed above were deleted. We need
      // to add them to the deletion list.
      existingChildren.forEach(function (child) {
        return deleteChild(returnFiber, child);
      });
    }

    return resultingFirstChild;
  }

  function reconcileSingleTextNode(returnFiber, currentFirstChild, textContent, priority) {
    // There's no need to check for keys on text nodes since we don't have a
    // way to define them.
    if (currentFirstChild !== null && currentFirstChild.tag === HostText$4) {
      // We already have an existing node so let's just update it and delete
      // the rest.
      deleteRemainingChildren(returnFiber, currentFirstChild.sibling);
      var existing = useFiber(currentFirstChild, priority);
      existing.pendingProps = textContent;
      existing['return'] = returnFiber;
      return existing;
    }
    // The existing first child is not a text node so we need to create one
    // and delete the existing ones.
    deleteRemainingChildren(returnFiber, currentFirstChild);
    var created = createFiberFromText$1(textContent, returnFiber.internalContextTag, priority);
    created['return'] = returnFiber;
    return created;
  }

  function reconcileSingleElement(returnFiber, currentFirstChild, element, priority) {
    var key = element.key;
    var child = currentFirstChild;
    while (child !== null) {
      // TODO: If key === null and child.key === null, then this only applies to
      // the first item in the list.
      if (child.key === key) {
        if (child.type === element.type) {
          deleteRemainingChildren(returnFiber, child.sibling);
          var existing = useFiber(child, priority);
          existing.ref = coerceRef(child, element);
          existing.pendingProps = element.props;
          existing['return'] = returnFiber;
          return existing;
        } else {
          deleteRemainingChildren(returnFiber, child);
          break;
        }
      } else {
        deleteChild(returnFiber, child);
      }
      child = child.sibling;
    }

    var created = createFiberFromElement$1(element, returnFiber.internalContextTag, priority);
    created.ref = coerceRef(currentFirstChild, element);
    created['return'] = returnFiber;
    return created;
  }

  function reconcileSingleCoroutine(returnFiber, currentFirstChild, coroutine, priority) {
    var key = coroutine.key;
    var child = currentFirstChild;
    while (child !== null) {
      // TODO: If key === null and child.key === null, then this only applies to
      // the first item in the list.
      if (child.key === key) {
        if (child.tag === CoroutineComponent$2) {
          deleteRemainingChildren(returnFiber, child.sibling);
          var existing = useFiber(child, priority);
          existing.pendingProps = coroutine;
          existing['return'] = returnFiber;
          return existing;
        } else {
          deleteRemainingChildren(returnFiber, child);
          break;
        }
      } else {
        deleteChild(returnFiber, child);
      }
      child = child.sibling;
    }

    var created = createFiberFromCoroutine$1(coroutine, returnFiber.internalContextTag, priority);
    created['return'] = returnFiber;
    return created;
  }

  function reconcileSingleYield(returnFiber, currentFirstChild, yieldNode, priority) {
    // There's no need to check for keys on yields since they're stateless.
    var child = currentFirstChild;
    if (child !== null) {
      if (child.tag === YieldComponent$2) {
        deleteRemainingChildren(returnFiber, child.sibling);
        var existing = useFiber(child, priority);
        existing.type = yieldNode.value;
        existing['return'] = returnFiber;
        return existing;
      } else {
        deleteRemainingChildren(returnFiber, child);
      }
    }

    var created = createFiberFromYield$1(yieldNode, returnFiber.internalContextTag, priority);
    created.type = yieldNode.value;
    created['return'] = returnFiber;
    return created;
  }

  function reconcileSinglePortal(returnFiber, currentFirstChild, portal, priority) {
    var key = portal.key;
    var child = currentFirstChild;
    while (child !== null) {
      // TODO: If key === null and child.key === null, then this only applies to
      // the first item in the list.
      if (child.key === key) {
        if (child.tag === HostPortal$4 && child.stateNode.containerInfo === portal.containerInfo && child.stateNode.implementation === portal.implementation) {
          deleteRemainingChildren(returnFiber, child.sibling);
          var existing = useFiber(child, priority);
          existing.pendingProps = portal.children || [];
          existing['return'] = returnFiber;
          return existing;
        } else {
          deleteRemainingChildren(returnFiber, child);
          break;
        }
      } else {
        deleteChild(returnFiber, child);
      }
      child = child.sibling;
    }

    var created = createFiberFromPortal$1(portal, returnFiber.internalContextTag, priority);
    created['return'] = returnFiber;
    return created;
  }

  // This API will tag the children with the side-effect of the reconciliation
  // itself. They will be added to the side-effect list as we pass through the
  // children and the parent.
  function reconcileChildFibers(returnFiber, currentFirstChild, newChild, priority) {
    // This function is not recursive.
    // If the top level item is an array, we treat it as a set of children,
    // not as a fragment. Nested arrays on the other hand will be treated as
    // fragment nodes. Recursion happens at the normal flow.

    // Handle object types
    var isObject = typeof newChild === 'object' && newChild !== null;
    if (isObject) {
      // Support only the subset of return types that Stack supports. Treat
      // everything else as empty, but log a warning.
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          return placeSingleChild(reconcileSingleElement(returnFiber, currentFirstChild, newChild, priority));

        case REACT_COROUTINE_TYPE:
          return placeSingleChild(reconcileSingleCoroutine(returnFiber, currentFirstChild, newChild, priority));

        case REACT_YIELD_TYPE:
          return placeSingleChild(reconcileSingleYield(returnFiber, currentFirstChild, newChild, priority));

        case REACT_PORTAL_TYPE:
          return placeSingleChild(reconcileSinglePortal(returnFiber, currentFirstChild, newChild, priority));
      }
    }

    if (typeof newChild === 'string' || typeof newChild === 'number') {
      return placeSingleChild(reconcileSingleTextNode(returnFiber, currentFirstChild, '' + newChild, priority));
    }

    if (isArray(newChild)) {
      return reconcileChildrenArray(returnFiber, currentFirstChild, newChild, priority);
    }

    if (getIteratorFn(newChild)) {
      return reconcileChildrenIterator(returnFiber, currentFirstChild, newChild, priority);
    }

    if (isObject) {
      throwOnInvalidObjectType(returnFiber, newChild);
    }

    if (typeof newChild === 'undefined') {
      // If the new child is undefined, and the return fiber is a composite
      // component, throw an error. If Fiber return types are disabled,
      // we already threw above.
      switch (returnFiber.tag) {
        case ClassComponent$7:
          {
            
          }
        // Intentionally fall through to the next case, which handles both
        // functions and classes
        // eslint-disable-next-lined no-fallthrough
        case FunctionalComponent$2:
          {
            var Component = returnFiber.type;
            reactProdInvariant_1('152', Component.displayName || Component.name || 'Component');
          }
      }
    }

    // Remaining cases are all treated as empty.
    return deleteRemainingChildren(returnFiber, currentFirstChild);
  }

  return reconcileChildFibers;
}

var reconcileChildFibers$1 = ChildReconciler(true, true);

var reconcileChildFibersInPlace$1 = ChildReconciler(false, true);

var mountChildFibersInPlace$1 = ChildReconciler(false, false);

var cloneChildFibers$1 = function (current, workInProgress) {
  !(current === null || workInProgress.child === current.child) ? reactProdInvariant_1('153') : void 0;

  if (workInProgress.child === null) {
    return;
  }

  var currentChild = workInProgress.child;
  var newChild = createWorkInProgress$2(currentChild, currentChild.pendingWorkPriority);
  // TODO: Pass this as an argument, since it's easy to forget.
  newChild.pendingProps = currentChild.pendingProps;
  workInProgress.child = newChild;

  newChild['return'] = workInProgress;
  while (currentChild.sibling !== null) {
    currentChild = currentChild.sibling;
    newChild = newChild.sibling = createWorkInProgress$2(currentChild, currentChild.pendingWorkPriority);
    newChild.pendingProps = currentChild.pendingProps;
    newChild['return'] = workInProgress;
  }
  newChild.sibling = null;
};

var ReactChildFiber = {
	reconcileChildFibers: reconcileChildFibers$1,
	reconcileChildFibersInPlace: reconcileChildFibersInPlace$1,
	mountChildFibersInPlace: mountChildFibersInPlace$1,
	cloneChildFibers: cloneChildFibers$1
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @typechecks
 * 
 */

/*eslint-disable no-self-compare */

var hasOwnProperty = Object.prototype.hasOwnProperty;

/**
 * inlined Object.is polyfill to avoid requiring consumers ship their own
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
 */
function is(x, y) {
  // SameValue algorithm
  if (x === y) {
    // Steps 1-5, 7-10
    // Steps 6.b-6.e: +0 != -0
    // Added the nonzero y check to make Flow happy, but it is redundant
    return x !== 0 || y !== 0 || 1 / x === 1 / y;
  } else {
    // Step 6.a: NaN == NaN
    return x !== x && y !== y;
  }
}

/**
 * Performs equality by iterating through keys on an object and returning false
 * when any key has values which are not strictly equal between the arguments.
 * Returns true when the values of all keys are strictly equal.
 */
function shallowEqual(objA, objB) {
  if (is(objA, objB)) {
    return true;
  }

  if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {
    return false;
  }

  var keysA = Object.keys(objA);
  var keysB = Object.keys(objB);

  if (keysA.length !== keysB.length) {
    return false;
  }

  // Test for A's keys different from B.
  for (var i = 0; i < keysA.length; i++) {
    if (!hasOwnProperty.call(objB, keysA[i]) || !is(objA[keysA[i]], objB[keysA[i]])) {
      return false;
    }
  }

  return true;
}

var shallowEqual_1 = shallowEqual;

var Update$1 = ReactTypeOfSideEffect.Update;



var AsyncUpdates$1 = ReactTypeOfInternalContext.AsyncUpdates;

var cacheContext$1 = ReactFiberContext.cacheContext;
var getMaskedContext$2 = ReactFiberContext.getMaskedContext;
var getUnmaskedContext$2 = ReactFiberContext.getUnmaskedContext;
var isContextConsumer$1 = ReactFiberContext.isContextConsumer;

var addUpdate$1 = ReactFiberUpdateQueue.addUpdate;
var addReplaceUpdate$1 = ReactFiberUpdateQueue.addReplaceUpdate;
var addForceUpdate$1 = ReactFiberUpdateQueue.addForceUpdate;
var beginUpdateQueue$2 = ReactFiberUpdateQueue.beginUpdateQueue;

var _require5 = ReactFiberContext;
var hasContextChanged$2 = _require5.hasContextChanged;

var isMounted$1 = ReactFiberTreeReflection.isMounted;







var ReactFiberClassComponent = function (scheduleUpdate, getPriorityContext, memoizeProps, memoizeState) {
  // Class component state updater
  var updater = {
    isMounted: isMounted$1,
    enqueueSetState: function (instance, partialState, callback) {
      var fiber = ReactInstanceMap_1.get(instance);
      var priorityLevel = getPriorityContext(fiber, false);
      callback = callback === undefined ? null : callback;
      addUpdate$1(fiber, partialState, callback, priorityLevel);
      scheduleUpdate(fiber, priorityLevel);
    },
    enqueueReplaceState: function (instance, state, callback) {
      var fiber = ReactInstanceMap_1.get(instance);
      var priorityLevel = getPriorityContext(fiber, false);
      callback = callback === undefined ? null : callback;
      addReplaceUpdate$1(fiber, state, callback, priorityLevel);
      scheduleUpdate(fiber, priorityLevel);
    },
    enqueueForceUpdate: function (instance, callback) {
      var fiber = ReactInstanceMap_1.get(instance);
      var priorityLevel = getPriorityContext(fiber, false);
      callback = callback === undefined ? null : callback;
      addForceUpdate$1(fiber, callback, priorityLevel);
      scheduleUpdate(fiber, priorityLevel);
    }
  };

  function checkShouldComponentUpdate(workInProgress, oldProps, newProps, oldState, newState, newContext) {
    if (oldProps === null || workInProgress.updateQueue !== null && workInProgress.updateQueue.hasForceUpdate) {
      // If the workInProgress already has an Update effect, return true
      return true;
    }

    var instance = workInProgress.stateNode;
    var type = workInProgress.type;
    if (typeof instance.shouldComponentUpdate === 'function') {
      var shouldUpdate = instance.shouldComponentUpdate(newProps, newState, newContext);
      return shouldUpdate;
    }

    if (type.prototype && type.prototype.isPureReactComponent) {
      return !shallowEqual_1(oldProps, newProps) || !shallowEqual_1(oldState, newState);
    }

    return true;
  }

  function resetInputPointers(workInProgress, instance) {
    instance.props = workInProgress.memoizedProps;
    instance.state = workInProgress.memoizedState;
  }

  function adoptClassInstance(workInProgress, instance) {
    instance.updater = updater;
    workInProgress.stateNode = instance;
    // The instance needs access to the fiber so that it can schedule updates
    ReactInstanceMap_1.set(instance, workInProgress);
    
  }

  function constructClassInstance(workInProgress, props) {
    var ctor = workInProgress.type;
    var unmaskedContext = getUnmaskedContext$2(workInProgress);
    var needsContext = isContextConsumer$1(workInProgress);
    var context = needsContext ? getMaskedContext$2(workInProgress, unmaskedContext) : emptyObject_1;
    var instance = new ctor(props, context);
    adoptClassInstance(workInProgress, instance);

    // Cache unmasked context so we can avoid recreating masked context unless necessary.
    // ReactFiberContext usually updates this cache but can't for newly-created instances.
    if (needsContext) {
      cacheContext$1(workInProgress, unmaskedContext, context);
    }

    return instance;
  }

  function callComponentWillMount(workInProgress, instance) {
    var oldState = instance.state;
    instance.componentWillMount();
    if (oldState !== instance.state) {
      updater.enqueueReplaceState(instance, instance.state, null);
    }
  }

  function callComponentWillReceiveProps(workInProgress, instance, newProps, newContext) {
    var oldState = instance.state;
    instance.componentWillReceiveProps(newProps, newContext);
    if (instance.state !== oldState) {
      updater.enqueueReplaceState(instance, instance.state, null);
    }
  }

  // Invokes the mount life-cycles on a previously never rendered instance.
  function mountClassInstance(workInProgress, priorityLevel) {
    var current = workInProgress.alternate;

    var instance = workInProgress.stateNode;
    var state = instance.state || null;

    var props = workInProgress.pendingProps;
    !props ? reactProdInvariant_1('158') : void 0;

    var unmaskedContext = getUnmaskedContext$2(workInProgress);

    instance.props = props;
    instance.state = state;
    instance.refs = emptyObject_1;
    instance.context = getMaskedContext$2(workInProgress, unmaskedContext);

    if (ReactFeatureFlags_1.enableAsyncSubtreeAPI && workInProgress.type != null && workInProgress.type.prototype != null && workInProgress.type.prototype.unstable_isAsyncReactComponent === true) {
      workInProgress.internalContextTag |= AsyncUpdates$1;
    }

    if (typeof instance.componentWillMount === 'function') {
      callComponentWillMount(workInProgress, instance);
      // If we had additional state updates during this life-cycle, let's
      // process them now.
      var updateQueue = workInProgress.updateQueue;
      if (updateQueue !== null) {
        instance.state = beginUpdateQueue$2(current, workInProgress, updateQueue, instance, state, props, priorityLevel);
      }
    }
    if (typeof instance.componentDidMount === 'function') {
      workInProgress.effectTag |= Update$1;
    }
  }

  // Called on a preexisting class instance. Returns false if a resumed render
  // could be reused.
  // function resumeMountClassInstance(
  //   workInProgress: Fiber,
  //   priorityLevel: PriorityLevel,
  // ): boolean {
  //   const instance = workInProgress.stateNode;
  //   resetInputPointers(workInProgress, instance);

  //   let newState = workInProgress.memoizedState;
  //   let newProps = workInProgress.pendingProps;
  //   if (!newProps) {
  //     // If there isn't any new props, then we'll reuse the memoized props.
  //     // This could be from already completed work.
  //     newProps = workInProgress.memoizedProps;
  //     invariant(
  //       newProps != null,
  //       'There should always be pending or memoized props. This error is ' +
  //         'likely caused by a bug in React. Please file an issue.',
  //     );
  //   }
  //   const newUnmaskedContext = getUnmaskedContext(workInProgress);
  //   const newContext = getMaskedContext(workInProgress, newUnmaskedContext);

  //   const oldContext = instance.context;
  //   const oldProps = workInProgress.memoizedProps;

  //   if (
  //     typeof instance.componentWillReceiveProps === 'function' &&
  //     (oldProps !== newProps || oldContext !== newContext)
  //   ) {
  //     callComponentWillReceiveProps(
  //       workInProgress,
  //       instance,
  //       newProps,
  //       newContext,
  //     );
  //   }

  //   // Process the update queue before calling shouldComponentUpdate
  //   const updateQueue = workInProgress.updateQueue;
  //   if (updateQueue !== null) {
  //     newState = beginUpdateQueue(
  //       workInProgress,
  //       updateQueue,
  //       instance,
  //       newState,
  //       newProps,
  //       priorityLevel,
  //     );
  //   }

  //   // TODO: Should we deal with a setState that happened after the last
  //   // componentWillMount and before this componentWillMount? Probably
  //   // unsupported anyway.

  //   if (
  //     !checkShouldComponentUpdate(
  //       workInProgress,
  //       workInProgress.memoizedProps,
  //       newProps,
  //       workInProgress.memoizedState,
  //       newState,
  //       newContext,
  //     )
  //   ) {
  //     // Update the existing instance's state, props, and context pointers even
  //     // though we're bailing out.
  //     instance.props = newProps;
  //     instance.state = newState;
  //     instance.context = newContext;
  //     return false;
  //   }

  //   // Update the input pointers now so that they are correct when we call
  //   // componentWillMount
  //   instance.props = newProps;
  //   instance.state = newState;
  //   instance.context = newContext;

  //   if (typeof instance.componentWillMount === 'function') {
  //     callComponentWillMount(workInProgress, instance);
  //     // componentWillMount may have called setState. Process the update queue.
  //     const newUpdateQueue = workInProgress.updateQueue;
  //     if (newUpdateQueue !== null) {
  //       newState = beginUpdateQueue(
  //         workInProgress,
  //         newUpdateQueue,
  //         instance,
  //         newState,
  //         newProps,
  //         priorityLevel,
  //       );
  //     }
  //   }

  //   if (typeof instance.componentDidMount === 'function') {
  //     workInProgress.effectTag |= Update;
  //   }

  //   instance.state = newState;

  //   return true;
  // }

  // Invokes the update life-cycles and returns false if it shouldn't rerender.
  function updateClassInstance(current, workInProgress, priorityLevel) {
    var instance = workInProgress.stateNode;
    resetInputPointers(workInProgress, instance);

    var oldProps = workInProgress.memoizedProps;
    var newProps = workInProgress.pendingProps;
    if (!newProps) {
      // If there aren't any new props, then we'll reuse the memoized props.
      // This could be from already completed work.
      newProps = oldProps;
      !(newProps != null) ? reactProdInvariant_1('159') : void 0;
    }
    var oldContext = instance.context;
    var newUnmaskedContext = getUnmaskedContext$2(workInProgress);
    var newContext = getMaskedContext$2(workInProgress, newUnmaskedContext);

    // Note: During these life-cycles, instance.props/instance.state are what
    // ever the previously attempted to render - not the "current". However,
    // during componentDidUpdate we pass the "current" props.

    if (typeof instance.componentWillReceiveProps === 'function' && (oldProps !== newProps || oldContext !== newContext)) {
      callComponentWillReceiveProps(workInProgress, instance, newProps, newContext);
    }

    // Compute the next state using the memoized state and the update queue.
    var oldState = workInProgress.memoizedState;
    // TODO: Previous state can be null.
    var newState = void 0;
    if (workInProgress.updateQueue !== null) {
      newState = beginUpdateQueue$2(current, workInProgress, workInProgress.updateQueue, instance, oldState, newProps, priorityLevel);
    } else {
      newState = oldState;
    }

    if (oldProps === newProps && oldState === newState && !hasContextChanged$2() && !(workInProgress.updateQueue !== null && workInProgress.updateQueue.hasForceUpdate)) {
      // If an update was already in progress, we should schedule an Update
      // effect even though we're bailing out, so that cWU/cDU are called.
      if (typeof instance.componentDidUpdate === 'function') {
        if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
          workInProgress.effectTag |= Update$1;
        }
      }
      return false;
    }

    var shouldUpdate = checkShouldComponentUpdate(workInProgress, oldProps, newProps, oldState, newState, newContext);

    if (shouldUpdate) {
      if (typeof instance.componentWillUpdate === 'function') {
        instance.componentWillUpdate(newProps, newState, newContext);
        
      }
      if (typeof instance.componentDidUpdate === 'function') {
        workInProgress.effectTag |= Update$1;
      }
    } else {
      // If an update was already in progress, we should schedule an Update
      // effect even though we're bailing out, so that cWU/cDU are called.
      if (typeof instance.componentDidUpdate === 'function') {
        if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
          workInProgress.effectTag |= Update$1;
        }
      }

      // If shouldComponentUpdate returned false, we should still update the
      // memoized props/state to indicate that this work can be reused.
      memoizeProps(workInProgress, newProps);
      memoizeState(workInProgress, newState);
    }

    // Update the existing instance's state, props, and context pointers even
    // if shouldComponentUpdate returns false.
    instance.props = newProps;
    instance.state = newState;
    instance.context = newContext;

    return shouldUpdate;
  }

  return {
    adoptClassInstance: adoptClassInstance,
    constructClassInstance: constructClassInstance,
    mountClassInstance: mountClassInstance,
    // resumeMountClassInstance,
    updateClassInstance: updateClassInstance
  };
};

var mountChildFibersInPlace = ReactChildFiber.mountChildFibersInPlace;
var reconcileChildFibers = ReactChildFiber.reconcileChildFibers;
var reconcileChildFibersInPlace = ReactChildFiber.reconcileChildFibersInPlace;
var cloneChildFibers = ReactChildFiber.cloneChildFibers;

var beginUpdateQueue$1 = ReactFiberUpdateQueue.beginUpdateQueue;



var getMaskedContext$1 = ReactFiberContext.getMaskedContext;
var getUnmaskedContext$1 = ReactFiberContext.getUnmaskedContext;
var hasContextChanged$1 = ReactFiberContext.hasContextChanged;
var pushContextProvider$1 = ReactFiberContext.pushContextProvider;
var pushTopLevelContextObject$1 = ReactFiberContext.pushTopLevelContextObject;
var invalidateContextProvider$1 = ReactFiberContext.invalidateContextProvider;

var IndeterminateComponent$2 = ReactTypeOfWork.IndeterminateComponent;
var FunctionalComponent$1 = ReactTypeOfWork.FunctionalComponent;
var ClassComponent$6 = ReactTypeOfWork.ClassComponent;
var HostRoot$6 = ReactTypeOfWork.HostRoot;
var HostComponent$6 = ReactTypeOfWork.HostComponent;
var HostText$3 = ReactTypeOfWork.HostText;
var HostPortal$3 = ReactTypeOfWork.HostPortal;
var CoroutineComponent$1 = ReactTypeOfWork.CoroutineComponent;
var CoroutineHandlerPhase = ReactTypeOfWork.CoroutineHandlerPhase;
var YieldComponent$1 = ReactTypeOfWork.YieldComponent;
var Fragment$1 = ReactTypeOfWork.Fragment;

var NoWork$3 = ReactPriorityLevel.NoWork;
var OffscreenPriority$1 = ReactPriorityLevel.OffscreenPriority;

var PerformedWork$1 = ReactTypeOfSideEffect.PerformedWork;
var Placement$2 = ReactTypeOfSideEffect.Placement;
var ContentReset$1 = ReactTypeOfSideEffect.ContentReset;
var Err$1 = ReactTypeOfSideEffect.Err;
var Ref$1 = ReactTypeOfSideEffect.Ref;



var ReactCurrentOwner$3 = ReactGlobalSharedState_1.ReactCurrentOwner;



var ReactFiberBeginWork = function (config, hostContext, hydrationContext, scheduleUpdate, getPriorityContext) {
  var shouldSetTextContent = config.shouldSetTextContent,
      useSyncScheduling = config.useSyncScheduling,
      shouldDeprioritizeSubtree = config.shouldDeprioritizeSubtree;
  var pushHostContext = hostContext.pushHostContext,
      pushHostContainer = hostContext.pushHostContainer;
  var enterHydrationState = hydrationContext.enterHydrationState,
      resetHydrationState = hydrationContext.resetHydrationState,
      tryToClaimNextHydratableInstance = hydrationContext.tryToClaimNextHydratableInstance;

  var _ReactFiberClassCompo = ReactFiberClassComponent(scheduleUpdate, getPriorityContext, memoizeProps, memoizeState),
      adoptClassInstance = _ReactFiberClassCompo.adoptClassInstance,
      constructClassInstance = _ReactFiberClassCompo.constructClassInstance,
      mountClassInstance = _ReactFiberClassCompo.mountClassInstance,
      updateClassInstance = _ReactFiberClassCompo.updateClassInstance;

  function reconcileChildren(current, workInProgress, nextChildren) {
    var priorityLevel = workInProgress.pendingWorkPriority;
    reconcileChildrenAtPriority(current, workInProgress, nextChildren, priorityLevel);
  }

  function reconcileChildrenAtPriority(current, workInProgress, nextChildren, priorityLevel) {
    if (current === null) {
      // If this is a fresh new component that hasn't been rendered yet, we
      // won't update its child set by applying minimal side-effects. Instead,
      // we will add them all to the child before it gets rendered. That means
      // we can optimize this reconciliation pass by not tracking side-effects.
      workInProgress.child = mountChildFibersInPlace(workInProgress, workInProgress.child, nextChildren, priorityLevel);
    } else if (current.child === workInProgress.child) {
      // If the current child is the same as the work in progress, it means that
      // we haven't yet started any work on these children. Therefore, we use
      // the clone algorithm to create a copy of all the current children.

      // If we had any progressed work already, that is invalid at this point so
      // let's throw it out.
      workInProgress.child = reconcileChildFibers(workInProgress, workInProgress.child, nextChildren, priorityLevel);
    } else {
      // If, on the other hand, it is already using a clone, that means we've
      // already begun some work on this tree and we can continue where we left
      // off by reconciling against the existing children.
      workInProgress.child = reconcileChildFibersInPlace(workInProgress, workInProgress.child, nextChildren, priorityLevel);
    }
  }

  function updateFragment(current, workInProgress) {
    var nextChildren = workInProgress.pendingProps;
    if (hasContextChanged$1()) {
      // Normally we can bail out on props equality but if context has changed
      // we don't do the bailout and we have to reuse existing props instead.
      if (nextChildren === null) {
        nextChildren = workInProgress.memoizedProps;
      }
    } else if (nextChildren === null || workInProgress.memoizedProps === nextChildren) {
      return bailoutOnAlreadyFinishedWork(current, workInProgress);
    }
    reconcileChildren(current, workInProgress, nextChildren);
    memoizeProps(workInProgress, nextChildren);
    return workInProgress.child;
  }

  function markRef(current, workInProgress) {
    var ref = workInProgress.ref;
    if (ref !== null && (!current || current.ref !== ref)) {
      // Schedule a Ref effect
      workInProgress.effectTag |= Ref$1;
    }
  }

  function updateFunctionalComponent(current, workInProgress) {
    var fn = workInProgress.type;
    var nextProps = workInProgress.pendingProps;

    var memoizedProps = workInProgress.memoizedProps;
    if (hasContextChanged$1()) {
      // Normally we can bail out on props equality but if context has changed
      // we don't do the bailout and we have to reuse existing props instead.
      if (nextProps === null) {
        nextProps = memoizedProps;
      }
    } else {
      if (nextProps === null || memoizedProps === nextProps) {
        return bailoutOnAlreadyFinishedWork(current, workInProgress);
      }
      // TODO: consider bringing fn.shouldComponentUpdate() back.
      // It used to be here.
    }

    var unmaskedContext = getUnmaskedContext$1(workInProgress);
    var context = getMaskedContext$1(workInProgress, unmaskedContext);

    var nextChildren;

    {
      nextChildren = fn(nextProps, context);
    }
    // React DevTools reads this flag.
    workInProgress.effectTag |= PerformedWork$1;
    reconcileChildren(current, workInProgress, nextChildren);
    memoizeProps(workInProgress, nextProps);
    return workInProgress.child;
  }

  function updateClassComponent(current, workInProgress, priorityLevel) {
    // Push context providers early to prevent context stack mismatches.
    // During mounting we don't know the child context yet as the instance doesn't exist.
    // We will invalidate the child context in finishClassComponent() right after rendering.
    var hasContext = pushContextProvider$1(workInProgress);

    var shouldUpdate = void 0;
    if (current === null) {
      if (!workInProgress.stateNode) {
        // In the initial pass we might need to construct the instance.
        constructClassInstance(workInProgress, workInProgress.pendingProps);
        mountClassInstance(workInProgress, priorityLevel);
        shouldUpdate = true;
      } else {
        reactProdInvariant_1('153');
        // In a resume, we'll already have an instance we can reuse.
        // shouldUpdate = resumeMountClassInstance(workInProgress, priorityLevel);
      }
    } else {
      shouldUpdate = updateClassInstance(current, workInProgress, priorityLevel);
    }
    return finishClassComponent(current, workInProgress, shouldUpdate, hasContext);
  }

  function finishClassComponent(current, workInProgress, shouldUpdate, hasContext) {
    // Refs should update even if shouldComponentUpdate returns false
    markRef(current, workInProgress);

    if (!shouldUpdate) {
      // Context providers should defer to sCU for rendering
      if (hasContext) {
        invalidateContextProvider$1(workInProgress, false);
      }

      return bailoutOnAlreadyFinishedWork(current, workInProgress);
    }

    var instance = workInProgress.stateNode;

    // Rerender
    ReactCurrentOwner$3.current = workInProgress;
    var nextChildren = void 0;
    {
      nextChildren = instance.render();
    }
    // React DevTools reads this flag.
    workInProgress.effectTag |= PerformedWork$1;
    reconcileChildren(current, workInProgress, nextChildren);
    // Memoize props and state using the values we just used to render.
    // TODO: Restructure so we never read values from the instance.
    memoizeState(workInProgress, instance.state);
    memoizeProps(workInProgress, instance.props);

    // The context might have changed so we need to recalculate it.
    if (hasContext) {
      invalidateContextProvider$1(workInProgress, true);
    }

    return workInProgress.child;
  }

  function pushHostRootContext(workInProgress) {
    var root = workInProgress.stateNode;
    if (root.pendingContext) {
      pushTopLevelContextObject$1(workInProgress, root.pendingContext, root.pendingContext !== root.context);
    } else if (root.context) {
      // Should always be set
      pushTopLevelContextObject$1(workInProgress, root.context, false);
    }
    pushHostContainer(workInProgress, root.containerInfo);
  }

  function updateHostRoot(current, workInProgress, priorityLevel) {
    pushHostRootContext(workInProgress);
    var updateQueue = workInProgress.updateQueue;
    if (updateQueue !== null) {
      var prevState = workInProgress.memoizedState;
      var state = beginUpdateQueue$1(current, workInProgress, updateQueue, null, prevState, null, priorityLevel);
      if (prevState === state) {
        // If the state is the same as before, that's a bailout because we had
        // no work matching this priority.
        resetHydrationState();
        return bailoutOnAlreadyFinishedWork(current, workInProgress);
      }
      var element = state.element;
      if ((current === null || current.child === null) && enterHydrationState(workInProgress)) {
        // If we don't have any current children this might be the first pass.
        // We always try to hydrate. If this isn't a hydration pass there won't
        // be any children to hydrate which is effectively the same thing as
        // not hydrating.

        // This is a bit of a hack. We track the host root as a placement to
        // know that we're currently in a mounting state. That way isMounted
        // works as expected. We must reset this before committing.
        // TODO: Delete this when we delete isMounted and findDOMNode.
        workInProgress.effectTag |= Placement$2;

        // Ensure that children mount into this root without tracking
        // side-effects. This ensures that we don't store Placement effects on
        // nodes that will be hydrated.
        workInProgress.child = mountChildFibersInPlace(workInProgress, workInProgress.child, element, priorityLevel);
      } else {
        // Otherwise reset hydration state in case we aborted and resumed another
        // root.
        resetHydrationState();
        reconcileChildren(current, workInProgress, element);
      }
      memoizeState(workInProgress, state);
      return workInProgress.child;
    }
    resetHydrationState();
    // If there is no update queue, that's a bailout because the root has no props.
    return bailoutOnAlreadyFinishedWork(current, workInProgress);
  }

  function updateHostComponent(current, workInProgress, renderPriority) {
    pushHostContext(workInProgress);

    if (current === null) {
      tryToClaimNextHydratableInstance(workInProgress);
    }

    var type = workInProgress.type;
    var memoizedProps = workInProgress.memoizedProps;
    var nextProps = workInProgress.pendingProps;
    if (nextProps === null) {
      nextProps = memoizedProps;
      !(nextProps !== null) ? reactProdInvariant_1('154') : void 0;
    }
    var prevProps = current !== null ? current.memoizedProps : null;

    if (hasContextChanged$1()) {
      // Normally we can bail out on props equality but if context has changed
      // we don't do the bailout and we have to reuse existing props instead.
    } else if (nextProps === null || memoizedProps === nextProps) {
      return bailoutOnAlreadyFinishedWork(current, workInProgress);
    }

    var nextChildren = nextProps.children;
    var isDirectTextChild = shouldSetTextContent(type, nextProps);

    if (isDirectTextChild) {
      // We special case a direct text child of a host node. This is a common
      // case. We won't handle it as a reified child. We will instead handle
      // this in the host environment that also have access to this prop. That
      // avoids allocating another HostText fiber and traversing it.
      nextChildren = null;
    } else if (prevProps && shouldSetTextContent(type, prevProps)) {
      // If we're switching from a direct text child to a normal child, or to
      // empty, we need to schedule the text content to be reset.
      workInProgress.effectTag |= ContentReset$1;
    }

    markRef(current, workInProgress);

    // Check the host config to see if the children are offscreen/hidden.
    if (renderPriority !== OffscreenPriority$1 && !useSyncScheduling && shouldDeprioritizeSubtree(type, nextProps)) {
      // Down-prioritize the children.
      workInProgress.pendingWorkPriority = OffscreenPriority$1;
      // Bailout and come back to this fiber later at OffscreenPriority.
      return null;
    }

    reconcileChildren(current, workInProgress, nextChildren);
    memoizeProps(workInProgress, nextProps);
    return workInProgress.child;
  }

  function updateHostText(current, workInProgress) {
    if (current === null) {
      tryToClaimNextHydratableInstance(workInProgress);
    }
    var nextProps = workInProgress.pendingProps;
    if (nextProps === null) {
      nextProps = workInProgress.memoizedProps;
    }
    memoizeProps(workInProgress, nextProps);
    // Nothing to do here. This is terminal. We'll do the completion step
    // immediately after.
    return null;
  }

  function mountIndeterminateComponent(current, workInProgress, priorityLevel) {
    !(current === null) ? reactProdInvariant_1('155') : void 0;
    var fn = workInProgress.type;
    var props = workInProgress.pendingProps;
    var unmaskedContext = getUnmaskedContext$1(workInProgress);
    var context = getMaskedContext$1(workInProgress, unmaskedContext);

    var value;

    {
      value = fn(props, context);
    }
    // React DevTools reads this flag.
    workInProgress.effectTag |= PerformedWork$1;

    if (typeof value === 'object' && value !== null && typeof value.render === 'function') {
      // Proceed under the assumption that this is a class instance
      workInProgress.tag = ClassComponent$6;

      // Push context providers early to prevent context stack mismatches.
      // During mounting we don't know the child context yet as the instance doesn't exist.
      // We will invalidate the child context in finishClassComponent() right after rendering.
      var hasContext = pushContextProvider$1(workInProgress);
      adoptClassInstance(workInProgress, value);
      mountClassInstance(workInProgress, priorityLevel);
      return finishClassComponent(current, workInProgress, true, hasContext);
    } else {
      // Proceed under the assumption that this is a functional component
      workInProgress.tag = FunctionalComponent$1;
      reconcileChildren(current, workInProgress, value);
      memoizeProps(workInProgress, props);
      return workInProgress.child;
    }
  }

  function updateCoroutineComponent(current, workInProgress) {
    var nextCoroutine = workInProgress.pendingProps;
    if (hasContextChanged$1()) {
      // Normally we can bail out on props equality but if context has changed
      // we don't do the bailout and we have to reuse existing props instead.
      if (nextCoroutine === null) {
        nextCoroutine = current && current.memoizedProps;
        !(nextCoroutine !== null) ? reactProdInvariant_1('154') : void 0;
      }
    } else if (nextCoroutine === null || workInProgress.memoizedProps === nextCoroutine) {
      nextCoroutine = workInProgress.memoizedProps;
      // TODO: When bailing out, we might need to return the stateNode instead
      // of the child. To check it for work.
      // return bailoutOnAlreadyFinishedWork(current, workInProgress);
    }

    var nextChildren = nextCoroutine.children;
    var priorityLevel = workInProgress.pendingWorkPriority;

    // The following is a fork of reconcileChildrenAtPriority but using
    // stateNode to store the child.
    if (current === null) {
      workInProgress.stateNode = mountChildFibersInPlace(workInProgress, workInProgress.stateNode, nextChildren, priorityLevel);
    } else if (current.child === workInProgress.child) {
      workInProgress.stateNode = reconcileChildFibers(workInProgress, workInProgress.stateNode, nextChildren, priorityLevel);
    } else {
      workInProgress.stateNode = reconcileChildFibersInPlace(workInProgress, workInProgress.stateNode, nextChildren, priorityLevel);
    }

    memoizeProps(workInProgress, nextCoroutine);
    // This doesn't take arbitrary time so we could synchronously just begin
    // eagerly do the work of workInProgress.child as an optimization.
    return workInProgress.stateNode;
  }

  function updatePortalComponent(current, workInProgress) {
    pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);
    var priorityLevel = workInProgress.pendingWorkPriority;
    var nextChildren = workInProgress.pendingProps;
    if (hasContextChanged$1()) {
      // Normally we can bail out on props equality but if context has changed
      // we don't do the bailout and we have to reuse existing props instead.
      if (nextChildren === null) {
        nextChildren = current && current.memoizedProps;
        !(nextChildren != null) ? reactProdInvariant_1('154') : void 0;
      }
    } else if (nextChildren === null || workInProgress.memoizedProps === nextChildren) {
      return bailoutOnAlreadyFinishedWork(current, workInProgress);
    }

    if (current === null) {
      // Portals are special because we don't append the children during mount
      // but at commit. Therefore we need to track insertions which the normal
      // flow doesn't do during mount. This doesn't happen at the root because
      // the root always starts with a "current" with a null child.
      // TODO: Consider unifying this with how the root works.
      workInProgress.child = reconcileChildFibersInPlace(workInProgress, workInProgress.child, nextChildren, priorityLevel);
      memoizeProps(workInProgress, nextChildren);
    } else {
      reconcileChildren(current, workInProgress, nextChildren);
      memoizeProps(workInProgress, nextChildren);
    }
    return workInProgress.child;
  }

  /*
  function reuseChildrenEffects(returnFiber : Fiber, firstChild : Fiber) {
    let child = firstChild;
    do {
      // Ensure that the first and last effect of the parent corresponds
      // to the children's first and last effect.
      if (!returnFiber.firstEffect) {
        returnFiber.firstEffect = child.firstEffect;
      }
      if (child.lastEffect) {
        if (returnFiber.lastEffect) {
          returnFiber.lastEffect.nextEffect = child.firstEffect;
        }
        returnFiber.lastEffect = child.lastEffect;
      }
    } while (child = child.sibling);
  }
  */

  function bailoutOnAlreadyFinishedWork(current, workInProgress) {
    cloneChildFibers(current, workInProgress);
    return workInProgress.child;
  }

  function bailoutOnLowPriority(current, workInProgress) {
    switch (workInProgress.tag) {
      case HostRoot$6:
        pushHostRootContext(workInProgress);
        break;
      case ClassComponent$6:
        pushContextProvider$1(workInProgress);
        break;
      case HostPortal$3:
        pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);
        break;
    }
    // TODO: What if this is currently in progress?
    // How can that happen? How is this not being cloned?
    return null;
  }

  // TODO: Delete memoizeProps/State and move to reconcile/bailout instead
  function memoizeProps(workInProgress, nextProps) {
    workInProgress.memoizedProps = nextProps;
  }

  function memoizeState(workInProgress, nextState) {
    workInProgress.memoizedState = nextState;
    // Don't reset the updateQueue, in case there are pending updates. Resetting
    // is handled by beginUpdateQueue.
  }

  function beginWork(current, workInProgress, priorityLevel) {
    if (workInProgress.pendingWorkPriority === NoWork$3 || workInProgress.pendingWorkPriority > priorityLevel) {
      return bailoutOnLowPriority(current, workInProgress);
    }

    switch (workInProgress.tag) {
      case IndeterminateComponent$2:
        return mountIndeterminateComponent(current, workInProgress, priorityLevel);
      case FunctionalComponent$1:
        return updateFunctionalComponent(current, workInProgress);
      case ClassComponent$6:
        return updateClassComponent(current, workInProgress, priorityLevel);
      case HostRoot$6:
        return updateHostRoot(current, workInProgress, priorityLevel);
      case HostComponent$6:
        return updateHostComponent(current, workInProgress, priorityLevel);
      case HostText$3:
        return updateHostText(current, workInProgress);
      case CoroutineHandlerPhase:
        // This is a restart. Reset the tag to the initial phase.
        workInProgress.tag = CoroutineComponent$1;
      // Intentionally fall through since this is now the same.
      case CoroutineComponent$1:
        return updateCoroutineComponent(current, workInProgress);
      case YieldComponent$1:
        // A yield component is just a placeholder, we can just run through the
        // next one immediately.
        return null;
      case HostPortal$3:
        return updatePortalComponent(current, workInProgress);
      case Fragment$1:
        return updateFragment(current, workInProgress);
      default:
        reactProdInvariant_1('156');
    }
  }

  function beginFailedWork(current, workInProgress, priorityLevel) {
    // Push context providers here to avoid a push/pop context mismatch.
    switch (workInProgress.tag) {
      case ClassComponent$6:
        pushContextProvider$1(workInProgress);
        break;
      case HostRoot$6:
        pushHostRootContext(workInProgress);
        break;
      default:
        reactProdInvariant_1('157');
    }

    // Add an error effect so we can handle the error during the commit phase
    workInProgress.effectTag |= Err$1;

    // This is a weird case where we do "resume" work — work that failed on
    // our first attempt. Because we no longer have a notion of "progressed
    // deletions," reset the child to the current child to make sure we delete
    // it again. TODO: Find a better way to handle this, perhaps during a more
    // general overhaul of error handling.
    if (current === null) {
      workInProgress.child = null;
    } else if (workInProgress.child !== current.child) {
      workInProgress.child = current.child;
    }

    if (workInProgress.pendingWorkPriority === NoWork$3 || workInProgress.pendingWorkPriority > priorityLevel) {
      return bailoutOnLowPriority(current, workInProgress);
    }

    // If we don't bail out, we're going be recomputing our children so we need
    // to drop our effect list.
    workInProgress.firstEffect = null;
    workInProgress.lastEffect = null;

    // Unmount the current children as if the component rendered null
    var nextChildren = null;
    reconcileChildrenAtPriority(current, workInProgress, nextChildren, priorityLevel);

    if (workInProgress.tag === ClassComponent$6) {
      var instance = workInProgress.stateNode;
      workInProgress.memoizedProps = instance.props;
      workInProgress.memoizedState = instance.state;
    }

    return workInProgress.child;
  }

  return {
    beginWork: beginWork,
    beginFailedWork: beginFailedWork
  };
};

var reconcileChildFibers$2 = ReactChildFiber.reconcileChildFibers;

var popContextProvider$2 = ReactFiberContext.popContextProvider;
var popTopLevelContextObject$1 = ReactFiberContext.popTopLevelContextObject;




var IndeterminateComponent$3 = ReactTypeOfWork.IndeterminateComponent;
var FunctionalComponent$3 = ReactTypeOfWork.FunctionalComponent;
var ClassComponent$8 = ReactTypeOfWork.ClassComponent;
var HostRoot$7 = ReactTypeOfWork.HostRoot;
var HostComponent$7 = ReactTypeOfWork.HostComponent;
var HostText$5 = ReactTypeOfWork.HostText;
var HostPortal$5 = ReactTypeOfWork.HostPortal;
var CoroutineComponent$3 = ReactTypeOfWork.CoroutineComponent;
var CoroutineHandlerPhase$1 = ReactTypeOfWork.CoroutineHandlerPhase;
var YieldComponent$3 = ReactTypeOfWork.YieldComponent;
var Fragment$3 = ReactTypeOfWork.Fragment;
var Placement$4 = ReactTypeOfSideEffect.Placement;
var Ref$2 = ReactTypeOfSideEffect.Ref;
var Update$2 = ReactTypeOfSideEffect.Update;
var OffscreenPriority$2 = ReactPriorityLevel.OffscreenPriority;




var ReactFiberCompleteWork = function (config, hostContext, hydrationContext) {
  var createInstance = config.createInstance,
      createTextInstance = config.createTextInstance,
      appendInitialChild = config.appendInitialChild,
      finalizeInitialChildren = config.finalizeInitialChildren,
      prepareUpdate = config.prepareUpdate;
  var getRootHostContainer = hostContext.getRootHostContainer,
      popHostContext = hostContext.popHostContext,
      getHostContext = hostContext.getHostContext,
      popHostContainer = hostContext.popHostContainer;
  var prepareToHydrateHostInstance = hydrationContext.prepareToHydrateHostInstance,
      prepareToHydrateHostTextInstance = hydrationContext.prepareToHydrateHostTextInstance,
      popHydrationState = hydrationContext.popHydrationState;


  function markUpdate(workInProgress) {
    // Tag the fiber with an update effect. This turns a Placement into
    // an UpdateAndPlacement.
    workInProgress.effectTag |= Update$2;
  }

  function markRef(workInProgress) {
    workInProgress.effectTag |= Ref$2;
  }

  function appendAllYields(yields, workInProgress) {
    var node = workInProgress.stateNode;
    if (node) {
      node['return'] = workInProgress;
    }
    while (node !== null) {
      if (node.tag === HostComponent$7 || node.tag === HostText$5 || node.tag === HostPortal$5) {
        reactProdInvariant_1('164');
      } else if (node.tag === YieldComponent$3) {
        yields.push(node.type);
      } else if (node.child !== null) {
        node.child['return'] = node;
        node = node.child;
        continue;
      }
      while (node.sibling === null) {
        if (node['return'] === null || node['return'] === workInProgress) {
          return;
        }
        node = node['return'];
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
    }
  }

  function moveCoroutineToHandlerPhase(current, workInProgress) {
    var coroutine = workInProgress.memoizedProps;
    !coroutine ? reactProdInvariant_1('165') : void 0;

    // First step of the coroutine has completed. Now we need to do the second.
    // TODO: It would be nice to have a multi stage coroutine represented by a
    // single component, or at least tail call optimize nested ones. Currently
    // that requires additional fields that we don't want to add to the fiber.
    // So this requires nested handlers.
    // Note: This doesn't mutate the alternate node. I don't think it needs to
    // since this stage is reset for every pass.
    workInProgress.tag = CoroutineHandlerPhase$1;

    // Build up the yields.
    // TODO: Compare this to a generator or opaque helpers like Children.
    var yields = [];
    appendAllYields(yields, workInProgress);
    var fn = coroutine.handler;
    var props = coroutine.props;
    var nextChildren = fn(props, yields);

    var currentFirstChild = current !== null ? current.child : null;
    // Inherit the priority of the returnFiber.
    var priority = workInProgress.pendingWorkPriority;
    workInProgress.child = reconcileChildFibers$2(workInProgress, currentFirstChild, nextChildren, priority);
    return workInProgress.child;
  }

  function appendAllChildren(parent, workInProgress) {
    // We only have the top Fiber that was created but we need recurse down its
    // children to find all the terminal nodes.
    var node = workInProgress.child;
    while (node !== null) {
      if (node.tag === HostComponent$7 || node.tag === HostText$5) {
        appendInitialChild(parent, node.stateNode);
      } else if (node.tag === HostPortal$5) {
        // If we have a portal child, then we don't want to traverse
        // down its children. Instead, we'll get insertions from each child in
        // the portal directly.
      } else if (node.child !== null) {
        node = node.child;
        continue;
      }
      if (node === workInProgress) {
        return;
      }
      while (node.sibling === null) {
        if (node['return'] === null || node['return'] === workInProgress) {
          return;
        }
        node = node['return'];
      }
      node = node.sibling;
    }
  }

  function completeWork(current, workInProgress, renderPriority) {
    // Get the latest props.
    var newProps = workInProgress.pendingProps;
    if (newProps === null) {
      newProps = workInProgress.memoizedProps;
    } else if (workInProgress.pendingWorkPriority !== OffscreenPriority$2 || renderPriority === OffscreenPriority$2) {
      // Reset the pending props, unless this was a down-prioritization.
      workInProgress.pendingProps = null;
    }

    switch (workInProgress.tag) {
      case FunctionalComponent$3:
        return null;
      case ClassComponent$8:
        {
          // We are leaving this subtree, so pop context if any.
          popContextProvider$2(workInProgress);
          return null;
        }
      case HostRoot$7:
        {
          popHostContainer(workInProgress);
          popTopLevelContextObject$1(workInProgress);
          var fiberRoot = workInProgress.stateNode;
          if (fiberRoot.pendingContext) {
            fiberRoot.context = fiberRoot.pendingContext;
            fiberRoot.pendingContext = null;
          }

          if (current === null || current.child === null) {
            // If we hydrated, pop so that we can delete any remaining children
            // that weren't hydrated.
            popHydrationState(workInProgress);
            // This resets the hacky state to fix isMounted before committing.
            // TODO: Delete this when we delete isMounted and findDOMNode.
            workInProgress.effectTag &= ~Placement$4;
          }
          return null;
        }
      case HostComponent$7:
        {
          popHostContext(workInProgress);
          var rootContainerInstance = getRootHostContainer();
          var type = workInProgress.type;
          if (current !== null && workInProgress.stateNode != null) {
            // If we have an alternate, that means this is an update and we need to
            // schedule a side-effect to do the updates.
            var oldProps = current.memoizedProps;
            // If we get updated because one of our children updated, we don't
            // have newProps so we'll have to reuse them.
            // TODO: Split the update API as separate for the props vs. children.
            // Even better would be if children weren't special cased at all tho.
            var instance = workInProgress.stateNode;
            var currentHostContext = getHostContext();
            var updatePayload = prepareUpdate(instance, type, oldProps, newProps, rootContainerInstance, currentHostContext);

            // TODO: Type this specific to this type of component.
            workInProgress.updateQueue = updatePayload;
            // If the update payload indicates that there is a change or if there
            // is a new ref we mark this as an update.
            if (updatePayload) {
              markUpdate(workInProgress);
            }
            if (current.ref !== workInProgress.ref) {
              markRef(workInProgress);
            }
          } else {
            if (!newProps) {
              !(workInProgress.stateNode !== null) ? reactProdInvariant_1('166') : void 0;
              // This can happen when we abort work.
              return null;
            }

            var _currentHostContext = getHostContext();
            // TODO: Move createInstance to beginWork and keep it on a context
            // "stack" as the parent. Then append children as we go in beginWork
            // or completeWork depending on we want to add then top->down or
            // bottom->up. Top->down is faster in IE11.
            var wasHydrated = popHydrationState(workInProgress);
            if (wasHydrated) {
              // TODO: Move this and createInstance step into the beginPhase
              // to consolidate.
              if (prepareToHydrateHostInstance(workInProgress, rootContainerInstance, _currentHostContext)) {
                // If changes to the hydrated node needs to be applied at the
                // commit-phase we mark this as such.
                markUpdate(workInProgress);
              }
            } else {
              var _instance = createInstance(type, newProps, rootContainerInstance, _currentHostContext, workInProgress);

              appendAllChildren(_instance, workInProgress);

              // Certain renderers require commit-time effects for initial mount.
              // (eg DOM renderer supports auto-focus for certain elements).
              // Make sure such renderers get scheduled for later work.
              if (finalizeInitialChildren(_instance, type, newProps, rootContainerInstance)) {
                markUpdate(workInProgress);
              }
              workInProgress.stateNode = _instance;
            }

            if (workInProgress.ref !== null) {
              // If there is a ref on a host node we need to schedule a callback
              markRef(workInProgress);
            }
          }
          return null;
        }
      case HostText$5:
        {
          var newText = newProps;
          if (current && workInProgress.stateNode != null) {
            var oldText = current.memoizedProps;
            // If we have an alternate, that means this is an update and we need
            // to schedule a side-effect to do the updates.
            if (oldText !== newText) {
              markUpdate(workInProgress);
            }
          } else {
            if (typeof newText !== 'string') {
              !(workInProgress.stateNode !== null) ? reactProdInvariant_1('166') : void 0;
              // This can happen when we abort work.
              return null;
            }
            var _rootContainerInstance = getRootHostContainer();
            var _currentHostContext2 = getHostContext();
            var _wasHydrated = popHydrationState(workInProgress);
            if (_wasHydrated) {
              if (prepareToHydrateHostTextInstance(workInProgress)) {
                markUpdate(workInProgress);
              }
            } else {
              workInProgress.stateNode = createTextInstance(newText, _rootContainerInstance, _currentHostContext2, workInProgress);
            }
          }
          return null;
        }
      case CoroutineComponent$3:
        return moveCoroutineToHandlerPhase(current, workInProgress);
      case CoroutineHandlerPhase$1:
        // Reset the tag to now be a first phase coroutine.
        workInProgress.tag = CoroutineComponent$3;
        return null;
      case YieldComponent$3:
        // Does nothing.
        return null;
      case Fragment$3:
        return null;
      case HostPortal$5:
        // TODO: Only mark this as an update if we have any pending callbacks.
        markUpdate(workInProgress);
        popHostContainer(workInProgress);
        return null;
      // Error cases
      case IndeterminateComponent$3:
        reactProdInvariant_1('167');
      // eslint-disable-next-line no-fallthrough
      default:
        reactProdInvariant_1('156');
    }
  }

  return {
    completeWork: completeWork
  };
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactFiberDevToolsHook
 * 
 */

var onCommitFiberRoot = null;
var onCommitFiberUnmount = null;
var hasLoggedError = false;

function catchErrors(fn) {
  return function (arg) {
    try {
      return fn(arg);
    } catch (err) {
      if (false && !hasLoggedError) {
        hasLoggedError = true;
        void 0;
      }
    }
  };
}

function injectInternals$1(internals) {
  if (typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined') {
    // No DevTools
    return false;
  }
  var hook = __REACT_DEVTOOLS_GLOBAL_HOOK__;
  if (!hook.supportsFiber) {
    return true;
  }
  try {
    var rendererID = hook.inject(internals);
    // We have successfully injected, so now it is safe to set up hooks.
    onCommitFiberRoot = catchErrors(function (root) {
      return hook.onCommitFiberRoot(rendererID, root);
    });
    onCommitFiberUnmount = catchErrors(function (fiber) {
      return hook.onCommitFiberUnmount(rendererID, fiber);
    });
  } catch (err) {
    // Catch all errors because it is unsafe to throw during initialization.
    
  }
  // DevTools exists
  return true;
}

function onCommitRoot$1(root) {
  if (typeof onCommitFiberRoot === 'function') {
    onCommitFiberRoot(root);
  }
}

function onCommitUnmount$1(fiber) {
  if (typeof onCommitFiberUnmount === 'function') {
    onCommitFiberUnmount(fiber);
  }
}

var injectInternals_1 = injectInternals$1;
var onCommitRoot_1 = onCommitRoot$1;
var onCommitUnmount_1 = onCommitUnmount$1;

var ReactFiberDevToolsHook = {
	injectInternals: injectInternals_1,
	onCommitRoot: onCommitRoot_1,
	onCommitUnmount: onCommitUnmount_1
};

var ClassComponent$9 = ReactTypeOfWork.ClassComponent;
var HostRoot$8 = ReactTypeOfWork.HostRoot;
var HostComponent$8 = ReactTypeOfWork.HostComponent;
var HostText$6 = ReactTypeOfWork.HostText;
var HostPortal$6 = ReactTypeOfWork.HostPortal;
var CoroutineComponent$4 = ReactTypeOfWork.CoroutineComponent;

var commitCallbacks$1 = ReactFiberUpdateQueue.commitCallbacks;

var onCommitUnmount = ReactFiberDevToolsHook.onCommitUnmount;

var Placement$5 = ReactTypeOfSideEffect.Placement;
var Update$3 = ReactTypeOfSideEffect.Update;
var Callback$1 = ReactTypeOfSideEffect.Callback;
var ContentReset$2 = ReactTypeOfSideEffect.ContentReset;



var ReactFiberCommitWork = function (config, captureError) {
  var commitMount = config.commitMount,
      commitUpdate = config.commitUpdate,
      resetTextContent = config.resetTextContent,
      commitTextUpdate = config.commitTextUpdate,
      appendChild = config.appendChild,
      appendChildToContainer = config.appendChildToContainer,
      insertBefore = config.insertBefore,
      insertInContainerBefore = config.insertInContainerBefore,
      removeChild = config.removeChild,
      removeChildFromContainer = config.removeChildFromContainer,
      getPublicInstance = config.getPublicInstance;


  function safelyCallComponentWillUnmount(current, instance) {
    var unmountError;

{
      try {
        instance.props = current.memoizedProps;
        instance.state = current.memoizedState;
        instance.componentWillUnmount();
      } catch (unmountError) {
        captureError(current, unmountError);
      }
    }
  }

  function safelyDetachRef(current) {
    var ref = current.ref;
    if (ref !== null) {
      var refError;

{
        try {
          ref(null);
        } catch (refError) {
          captureError(current, refError);
        }
      }
    }
  }

  function getHostParentFiber(fiber) {
    var parent = fiber['return'];
    while (parent !== null) {
      if (isHostParent(parent)) {
        return parent;
      }
      parent = parent['return'];
    }
    reactProdInvariant_1('160');
  }

  function isHostParent(fiber) {
    return fiber.tag === HostComponent$8 || fiber.tag === HostRoot$8 || fiber.tag === HostPortal$6;
  }

  function getHostSibling(fiber) {
    // We're going to search forward into the tree until we find a sibling host
    // node. Unfortunately, if multiple insertions are done in a row we have to
    // search past them. This leads to exponential search for the next sibling.
    var node = fiber;
    siblings: while (true) {
      // If we didn't find anything, let's try the next sibling.
      while (node.sibling === null) {
        if (node['return'] === null || isHostParent(node['return'])) {
          // If we pop out of the root or hit the parent the fiber we are the
          // last sibling.
          return null;
        }
        node = node['return'];
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
      while (node.tag !== HostComponent$8 && node.tag !== HostText$6) {
        // If it is not host node and, we might have a host node inside it.
        // Try to search down until we find one.
        if (node.effectTag & Placement$5) {
          // If we don't have a child, try the siblings instead.
          continue siblings;
        }
        // If we don't have a child, try the siblings instead.
        // We also skip portals because they are not part of this host tree.
        if (node.child === null || node.tag === HostPortal$6) {
          continue siblings;
        } else {
          node.child['return'] = node;
          node = node.child;
        }
      }
      // Check if this host node is stable or about to be placed.
      if (!(node.effectTag & Placement$5)) {
        // Found it!
        return node.stateNode;
      }
    }
  }

  function commitPlacement(finishedWork) {
    // Recursively insert all host nodes into the parent.
    var parentFiber = getHostParentFiber(finishedWork);
    var parent = void 0;
    var isContainer = void 0;
    switch (parentFiber.tag) {
      case HostComponent$8:
        parent = parentFiber.stateNode;
        isContainer = false;
        break;
      case HostRoot$8:
        parent = parentFiber.stateNode.containerInfo;
        isContainer = true;
        break;
      case HostPortal$6:
        parent = parentFiber.stateNode.containerInfo;
        isContainer = true;
        break;
      default:
        reactProdInvariant_1('161');
    }
    if (parentFiber.effectTag & ContentReset$2) {
      // Reset the text content of the parent before doing any insertions
      resetTextContent(parent);
      // Clear ContentReset from the effect tag
      parentFiber.effectTag &= ~ContentReset$2;
    }

    var before = getHostSibling(finishedWork);
    // We only have the top Fiber that was inserted but we need recurse down its
    // children to find all the terminal nodes.
    var node = finishedWork;
    while (true) {
      if (node.tag === HostComponent$8 || node.tag === HostText$6) {
        if (before) {
          if (isContainer) {
            insertInContainerBefore(parent, node.stateNode, before);
          } else {
            insertBefore(parent, node.stateNode, before);
          }
        } else {
          if (isContainer) {
            appendChildToContainer(parent, node.stateNode);
          } else {
            appendChild(parent, node.stateNode);
          }
        }
      } else if (node.tag === HostPortal$6) {
        // If the insertion itself is a portal, then we don't want to traverse
        // down its children. Instead, we'll get insertions from each child in
        // the portal directly.
      } else if (node.child !== null) {
        node.child['return'] = node;
        node = node.child;
        continue;
      }
      if (node === finishedWork) {
        return;
      }
      while (node.sibling === null) {
        if (node['return'] === null || node['return'] === finishedWork) {
          return;
        }
        node = node['return'];
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
    }
  }

  function commitNestedUnmounts(root) {
    // While we're inside a removed host node we don't want to call
    // removeChild on the inner nodes because they're removed by the top
    // call anyway. We also want to call componentWillUnmount on all
    // composites before this host node is removed from the tree. Therefore
    var node = root;
    while (true) {
      commitUnmount(node);
      // Visit children because they may contain more composite or host nodes.
      // Skip portals because commitUnmount() currently visits them recursively.
      if (node.child !== null && node.tag !== HostPortal$6) {
        node.child['return'] = node;
        node = node.child;
        continue;
      }
      if (node === root) {
        return;
      }
      while (node.sibling === null) {
        if (node['return'] === null || node['return'] === root) {
          return;
        }
        node = node['return'];
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
    }
  }

  function unmountHostComponents(current) {
    // We only have the top Fiber that was inserted but we need recurse down its
    var node = current;

    // Each iteration, currentParent is populated with node's host parent if not
    // currentParentIsValid.
    var currentParentIsValid = false;
    var currentParent = void 0;
    var currentParentIsContainer = void 0;

    while (true) {
      if (!currentParentIsValid) {
        var parent = node['return'];
        findParent: while (true) {
          !(parent !== null) ? reactProdInvariant_1('160') : void 0;
          switch (parent.tag) {
            case HostComponent$8:
              currentParent = parent.stateNode;
              currentParentIsContainer = false;
              break findParent;
            case HostRoot$8:
              currentParent = parent.stateNode.containerInfo;
              currentParentIsContainer = true;
              break findParent;
            case HostPortal$6:
              currentParent = parent.stateNode.containerInfo;
              currentParentIsContainer = true;
              break findParent;
          }
          parent = parent['return'];
        }
        currentParentIsValid = true;
      }

      if (node.tag === HostComponent$8 || node.tag === HostText$6) {
        commitNestedUnmounts(node);
        // After all the children have unmounted, it is now safe to remove the
        // node from the tree.
        if (currentParentIsContainer) {
          removeChildFromContainer(currentParent, node.stateNode);
        } else {
          removeChild(currentParent, node.stateNode);
        }
        // Don't visit children because we already visited them.
      } else if (node.tag === HostPortal$6) {
        // When we go into a portal, it becomes the parent to remove from.
        // We will reassign it back when we pop the portal on the way up.
        currentParent = node.stateNode.containerInfo;
        // Visit children because portals might contain host components.
        if (node.child !== null) {
          node.child['return'] = node;
          node = node.child;
          continue;
        }
      } else {
        commitUnmount(node);
        // Visit children because we may find more host components below.
        if (node.child !== null) {
          node.child['return'] = node;
          node = node.child;
          continue;
        }
      }
      if (node === current) {
        return;
      }
      while (node.sibling === null) {
        if (node['return'] === null || node['return'] === current) {
          return;
        }
        node = node['return'];
        if (node.tag === HostPortal$6) {
          // When we go out of the portal, we need to restore the parent.
          // Since we don't keep a stack of them, we will search for it.
          currentParentIsValid = false;
        }
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
    }
  }

  function commitDeletion(current) {
    // Recursively delete all host nodes from the parent.
    // Detach refs and call componentWillUnmount() on the whole subtree.
    unmountHostComponents(current);

    // Cut off the return pointers to disconnect it from the tree. Ideally, we
    // should clear the child pointer of the parent alternate to let this
    // get GC:ed but we don't know which for sure which parent is the current
    // one so we'll settle for GC:ing the subtree of this child. This child
    // itself will be GC:ed when the parent updates the next time.
    current['return'] = null;
    current.child = null;
    if (current.alternate) {
      current.alternate.child = null;
      current.alternate['return'] = null;
    }
  }

  // User-originating errors (lifecycles and refs) should not interrupt
  // deletion, so don't let them throw. Host-originating errors should
  // interrupt deletion, so it's okay
  function commitUnmount(current) {
    if (typeof onCommitUnmount === 'function') {
      onCommitUnmount(current);
    }

    switch (current.tag) {
      case ClassComponent$9:
        {
          safelyDetachRef(current);
          var instance = current.stateNode;
          if (typeof instance.componentWillUnmount === 'function') {
            safelyCallComponentWillUnmount(current, instance);
          }
          return;
        }
      case HostComponent$8:
        {
          safelyDetachRef(current);
          return;
        }
      case CoroutineComponent$4:
        {
          commitNestedUnmounts(current.stateNode);
          return;
        }
      case HostPortal$6:
        {
          // TODO: this is recursive.
          // We are also not using this parent because
          // the portal will get pushed immediately.
          unmountHostComponents(current);
          return;
        }
    }
  }

  function commitWork(current, finishedWork) {
    switch (finishedWork.tag) {
      case ClassComponent$9:
        {
          return;
        }
      case HostComponent$8:
        {
          var instance = finishedWork.stateNode;
          if (instance != null) {
            // Commit the work prepared earlier.
            var newProps = finishedWork.memoizedProps;
            // For hydration we reuse the update path but we treat the oldProps
            // as the newProps. The updatePayload will contain the real change in
            // this case.
            var oldProps = current !== null ? current.memoizedProps : newProps;
            var type = finishedWork.type;
            // TODO: Type the updateQueue to be specific to host components.
            var updatePayload = finishedWork.updateQueue;
            finishedWork.updateQueue = null;
            if (updatePayload !== null) {
              commitUpdate(instance, updatePayload, type, oldProps, newProps, finishedWork);
            }
          }
          return;
        }
      case HostText$6:
        {
          !(finishedWork.stateNode !== null) ? reactProdInvariant_1('162') : void 0;
          var textInstance = finishedWork.stateNode;
          var newText = finishedWork.memoizedProps;
          // For hydration we reuse the update path but we treat the oldProps
          // as the newProps. The updatePayload will contain the real change in
          // this case.
          var oldText = current !== null ? current.memoizedProps : newText;
          commitTextUpdate(textInstance, oldText, newText);
          return;
        }
      case HostRoot$8:
        {
          return;
        }
      case HostPortal$6:
        {
          return;
        }
      default:
        {
          reactProdInvariant_1('163');
        }
    }
  }

  function commitLifeCycles(current, finishedWork) {
    switch (finishedWork.tag) {
      case ClassComponent$9:
        {
          var instance = finishedWork.stateNode;
          if (finishedWork.effectTag & Update$3) {
            if (current === null) {
              instance.props = finishedWork.memoizedProps;
              instance.state = finishedWork.memoizedState;
              instance.componentDidMount();
              
            } else {
              var prevProps = current.memoizedProps;
              var prevState = current.memoizedState;
              instance.props = finishedWork.memoizedProps;
              instance.state = finishedWork.memoizedState;
              instance.componentDidUpdate(prevProps, prevState);
              
            }
          }
          if (finishedWork.effectTag & Callback$1 && finishedWork.updateQueue !== null) {
            commitCallbacks$1(finishedWork, finishedWork.updateQueue, instance);
          }
          return;
        }
      case HostRoot$8:
        {
          var updateQueue = finishedWork.updateQueue;
          if (updateQueue !== null) {
            var _instance = finishedWork.child && finishedWork.child.stateNode;
            commitCallbacks$1(finishedWork, updateQueue, _instance);
          }
          return;
        }
      case HostComponent$8:
        {
          var _instance2 = finishedWork.stateNode;

          // Renderers may schedule work to be done after host components are mounted
          // (eg DOM renderer may schedule auto-focus for inputs and form controls).
          // These effects should only be committed when components are first mounted,
          // aka when there is no current/alternate.
          if (current === null && finishedWork.effectTag & Update$3) {
            var type = finishedWork.type;
            var props = finishedWork.memoizedProps;
            commitMount(_instance2, type, props, finishedWork);
          }

          return;
        }
      case HostText$6:
        {
          // We have no life-cycles associated with text.
          return;
        }
      case HostPortal$6:
        {
          // We have no life-cycles associated with portals.
          return;
        }
      default:
        {
          reactProdInvariant_1('163');
        }
    }
  }

  function commitAttachRef(finishedWork) {
    var ref = finishedWork.ref;
    if (ref !== null) {
      var instance = finishedWork.stateNode;
      switch (finishedWork.tag) {
        case HostComponent$8:
          ref(getPublicInstance(instance));
          break;
        default:
          ref(instance);
      }
    }
  }

  function commitDetachRef(current) {
    var currentRef = current.ref;
    if (currentRef !== null) {
      currentRef(null);
    }
  }

  return {
    commitPlacement: commitPlacement,
    commitDeletion: commitDeletion,
    commitWork: commitWork,
    commitLifeCycles: commitLifeCycles,
    commitAttachRef: commitAttachRef,
    commitDetachRef: commitDetachRef
  };
};

var createCursor$2 = ReactFiberStack.createCursor;
var pop$2 = ReactFiberStack.pop;
var push$2 = ReactFiberStack.push;



var NO_CONTEXT = {};

var ReactFiberHostContext = function (config) {
  var getChildHostContext = config.getChildHostContext,
      getRootHostContext = config.getRootHostContext;


  var contextStackCursor = createCursor$2(NO_CONTEXT);
  var contextFiberStackCursor = createCursor$2(NO_CONTEXT);
  var rootInstanceStackCursor = createCursor$2(NO_CONTEXT);

  function requiredContext(c) {
    !(c !== NO_CONTEXT) ? reactProdInvariant_1('174') : void 0;
    return c;
  }

  function getRootHostContainer() {
    var rootInstance = requiredContext(rootInstanceStackCursor.current);
    return rootInstance;
  }

  function pushHostContainer(fiber, nextRootInstance) {
    // Push current root instance onto the stack;
    // This allows us to reset root when portals are popped.
    push$2(rootInstanceStackCursor, nextRootInstance, fiber);

    var nextRootContext = getRootHostContext(nextRootInstance);

    // Track the context and the Fiber that provided it.
    // This enables us to pop only Fibers that provide unique contexts.
    push$2(contextFiberStackCursor, fiber, fiber);
    push$2(contextStackCursor, nextRootContext, fiber);
  }

  function popHostContainer(fiber) {
    pop$2(contextStackCursor, fiber);
    pop$2(contextFiberStackCursor, fiber);
    pop$2(rootInstanceStackCursor, fiber);
  }

  function getHostContext() {
    var context = requiredContext(contextStackCursor.current);
    return context;
  }

  function pushHostContext(fiber) {
    var rootInstance = requiredContext(rootInstanceStackCursor.current);
    var context = requiredContext(contextStackCursor.current);
    var nextContext = getChildHostContext(context, fiber.type, rootInstance);

    // Don't push this Fiber's context unless it's unique.
    if (context === nextContext) {
      return;
    }

    // Track the context and the Fiber that provided it.
    // This enables us to pop only Fibers that provide unique contexts.
    push$2(contextFiberStackCursor, fiber, fiber);
    push$2(contextStackCursor, nextContext, fiber);
  }

  function popHostContext(fiber) {
    // Do not pop unless this Fiber provided the current context.
    // pushHostContext() only pushes Fibers that provide unique contexts.
    if (contextFiberStackCursor.current !== fiber) {
      return;
    }

    pop$2(contextStackCursor, fiber);
    pop$2(contextFiberStackCursor, fiber);
  }

  function resetHostContainer() {
    contextStackCursor.current = NO_CONTEXT;
    rootInstanceStackCursor.current = NO_CONTEXT;
  }

  return {
    getHostContext: getHostContext,
    getRootHostContainer: getRootHostContainer,
    popHostContainer: popHostContainer,
    popHostContext: popHostContext,
    pushHostContainer: pushHostContainer,
    pushHostContext: pushHostContext,
    resetHostContainer: resetHostContainer
  };
};

var HostComponent$9 = ReactTypeOfWork.HostComponent;
var HostText$7 = ReactTypeOfWork.HostText;
var HostRoot$9 = ReactTypeOfWork.HostRoot;

var Deletion$2 = ReactTypeOfSideEffect.Deletion;
var Placement$6 = ReactTypeOfSideEffect.Placement;

var createFiberFromHostInstanceForDeletion$1 = ReactFiber.createFiberFromHostInstanceForDeletion;

var ReactFiberHydrationContext = function (config) {
  var shouldSetTextContent = config.shouldSetTextContent,
      canHydrateInstance = config.canHydrateInstance,
      canHydrateTextInstance = config.canHydrateTextInstance,
      getNextHydratableSibling = config.getNextHydratableSibling,
      getFirstHydratableChild = config.getFirstHydratableChild,
      hydrateInstance = config.hydrateInstance,
      hydrateTextInstance = config.hydrateTextInstance,
      didNotHydrateInstance = config.didNotHydrateInstance,
      didNotFindHydratableInstance = config.didNotFindHydratableInstance,
      didNotFindHydratableTextInstance = config.didNotFindHydratableTextInstance;

  // If this doesn't have hydration mode.

  if (!(canHydrateInstance && canHydrateTextInstance && getNextHydratableSibling && getFirstHydratableChild && hydrateInstance && hydrateTextInstance && didNotHydrateInstance && didNotFindHydratableInstance && didNotFindHydratableTextInstance)) {
    return {
      enterHydrationState: function () {
        return false;
      },
      resetHydrationState: function () {},
      tryToClaimNextHydratableInstance: function () {},
      prepareToHydrateHostInstance: function () {
        reactProdInvariant_1('175');
      },
      prepareToHydrateHostTextInstance: function () {
        reactProdInvariant_1('176');
      },
      popHydrationState: function (fiber) {
        return false;
      }
    };
  }

  // The deepest Fiber on the stack involved in a hydration context.
  // This may have been an insertion or a hydration.
  var hydrationParentFiber = null;
  var nextHydratableInstance = null;
  var isHydrating = false;

  function enterHydrationState(fiber) {
    var parentInstance = fiber.stateNode.containerInfo;
    nextHydratableInstance = getFirstHydratableChild(parentInstance);
    hydrationParentFiber = fiber;
    isHydrating = true;
    return true;
  }

  function deleteHydratableInstance(returnFiber, instance) {
    var childToDelete = createFiberFromHostInstanceForDeletion$1();
    childToDelete.stateNode = instance;
    childToDelete['return'] = returnFiber;
    childToDelete.effectTag = Deletion$2;

    // This might seem like it belongs on progressedFirstDeletion. However,
    // these children are not part of the reconciliation list of children.
    // Even if we abort and rereconcile the children, that will try to hydrate
    // again and the nodes are still in the host tree so these will be
    // recreated.
    if (returnFiber.lastEffect !== null) {
      returnFiber.lastEffect.nextEffect = childToDelete;
      returnFiber.lastEffect = childToDelete;
    } else {
      returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;
    }
  }

  function insertNonHydratedInstance(returnFiber, fiber) {
    fiber.effectTag |= Placement$6;
    
  }

  function canHydrate(fiber, nextInstance) {
    switch (fiber.tag) {
      case HostComponent$9:
        {
          var type = fiber.type;
          var props = fiber.pendingProps;
          return canHydrateInstance(nextInstance, type, props);
        }
      case HostText$7:
        {
          var text = fiber.pendingProps;
          return canHydrateTextInstance(nextInstance, text);
        }
      default:
        return false;
    }
  }

  function tryToClaimNextHydratableInstance(fiber) {
    if (!isHydrating) {
      return;
    }
    var nextInstance = nextHydratableInstance;
    if (!nextInstance) {
      // Nothing to hydrate. Make it an insertion.
      insertNonHydratedInstance(hydrationParentFiber, fiber);
      isHydrating = false;
      hydrationParentFiber = fiber;
      return;
    }
    if (!canHydrate(fiber, nextInstance)) {
      // If we can't hydrate this instance let's try the next one.
      // We use this as a heuristic. It's based on intuition and not data so it
      // might be flawed or unnecessary.
      nextInstance = getNextHydratableSibling(nextInstance);
      if (!nextInstance || !canHydrate(fiber, nextInstance)) {
        // Nothing to hydrate. Make it an insertion.
        insertNonHydratedInstance(hydrationParentFiber, fiber);
        isHydrating = false;
        hydrationParentFiber = fiber;
        return;
      }
      // We matched the next one, we'll now assume that the first one was
      // superfluous and we'll delete it. Since we can't eagerly delete it
      // we'll have to schedule a deletion. To do that, this node needs a dummy
      // fiber associated with it.
      deleteHydratableInstance(hydrationParentFiber, nextHydratableInstance);
    }
    fiber.stateNode = nextInstance;
    hydrationParentFiber = fiber;
    nextHydratableInstance = getFirstHydratableChild(nextInstance);
  }

  function prepareToHydrateHostInstance(fiber, rootContainerInstance, hostContext) {
    var instance = fiber.stateNode;
    var updatePayload = hydrateInstance(instance, fiber.type, fiber.memoizedProps, rootContainerInstance, hostContext, fiber);
    // TODO: Type this specific to this type of component.
    fiber.updateQueue = updatePayload;
    // If the update payload indicates that there is a change or if there
    // is a new ref we mark this as an update.
    if (updatePayload !== null) {
      return true;
    }
    return false;
  }

  function prepareToHydrateHostTextInstance(fiber) {
    var textInstance = fiber.stateNode;
    var shouldUpdate = hydrateTextInstance(textInstance, fiber.memoizedProps, fiber);
    return shouldUpdate;
  }

  function popToNextHostParent(fiber) {
    var parent = fiber['return'];
    while (parent !== null && parent.tag !== HostComponent$9 && parent.tag !== HostRoot$9) {
      parent = parent['return'];
    }
    hydrationParentFiber = parent;
  }

  function popHydrationState(fiber) {
    if (fiber !== hydrationParentFiber) {
      // We're deeper than the current hydration context, inside an inserted
      // tree.
      return false;
    }
    if (!isHydrating) {
      // If we're not currently hydrating but we're in a hydration context, then
      // we were an insertion and now need to pop up reenter hydration of our
      // siblings.
      popToNextHostParent(fiber);
      isHydrating = true;
      return false;
    }

    var type = fiber.type;

    // If we have any remaining hydratable nodes, we need to delete them now.
    // We only do this deeper than head and body since they tend to have random
    // other nodes in them. We also ignore components with pure text content in
    // side of them.
    // TODO: Better heuristic.
    if (fiber.tag !== HostComponent$9 || type !== 'head' && type !== 'body' && !shouldSetTextContent(type, fiber.memoizedProps)) {
      var nextInstance = nextHydratableInstance;
      while (nextInstance) {
        deleteHydratableInstance(fiber, nextInstance);
        nextInstance = getNextHydratableSibling(nextInstance);
      }
    }

    popToNextHostParent(fiber);
    nextHydratableInstance = hydrationParentFiber ? getNextHydratableSibling(fiber.stateNode) : null;
    return true;
  }

  function resetHydrationState() {
    hydrationParentFiber = null;
    nextHydratableInstance = null;
    isHydrating = false;
  }

  return {
    enterHydrationState: enterHydrationState,
    resetHydrationState: resetHydrationState,
    tryToClaimNextHydratableInstance: tryToClaimNextHydratableInstance,
    prepareToHydrateHostInstance: prepareToHydrateHostInstance,
    prepareToHydrateHostTextInstance: prepareToHydrateHostTextInstance,
    popHydrationState: popHydrationState
  };
};

var popContextProvider$1 = ReactFiberContext.popContextProvider;

var reset$1 = ReactFiberStack.reset;

var getStackAddendumByWorkInProgressFiber$1 = ReactFiberComponentTreeHook.getStackAddendumByWorkInProgressFiber;

var logCapturedError = ReactFiberErrorLogger.logCapturedError;

var ReactCurrentOwner$2 = ReactGlobalSharedState_1.ReactCurrentOwner;



var createWorkInProgress$1 = ReactFiber.createWorkInProgress;
var largerPriority$1 = ReactFiber.largerPriority;

var onCommitRoot = ReactFiberDevToolsHook.onCommitRoot;

var NoWork$2 = ReactPriorityLevel.NoWork;
var SynchronousPriority$1 = ReactPriorityLevel.SynchronousPriority;
var TaskPriority$1 = ReactPriorityLevel.TaskPriority;
var HighPriority = ReactPriorityLevel.HighPriority;
var LowPriority = ReactPriorityLevel.LowPriority;
var OffscreenPriority = ReactPriorityLevel.OffscreenPriority;

var AsyncUpdates = ReactTypeOfInternalContext.AsyncUpdates;

var PerformedWork = ReactTypeOfSideEffect.PerformedWork;
var Placement$1 = ReactTypeOfSideEffect.Placement;
var Update = ReactTypeOfSideEffect.Update;
var PlacementAndUpdate = ReactTypeOfSideEffect.PlacementAndUpdate;
var Deletion = ReactTypeOfSideEffect.Deletion;
var ContentReset = ReactTypeOfSideEffect.ContentReset;
var Callback = ReactTypeOfSideEffect.Callback;
var Err = ReactTypeOfSideEffect.Err;
var Ref = ReactTypeOfSideEffect.Ref;

var HostRoot$5 = ReactTypeOfWork.HostRoot;
var HostComponent$4 = ReactTypeOfWork.HostComponent;
var HostPortal$2 = ReactTypeOfWork.HostPortal;
var ClassComponent$4 = ReactTypeOfWork.ClassComponent;

var getUpdatePriority$1 = ReactFiberUpdateQueue.getUpdatePriority;

var _require14 = ReactFiberContext;
var resetContext$1 = _require14.resetContext;



var ReactFiberInstrumentation$1;

var timeHeuristicForUnitOfWork = 1;

var ReactFiberScheduler = function (config) {
  var hostContext = ReactFiberHostContext(config);
  var hydrationContext = ReactFiberHydrationContext(config);
  var popHostContainer = hostContext.popHostContainer,
      popHostContext = hostContext.popHostContext,
      resetHostContainer = hostContext.resetHostContainer;

  var _ReactFiberBeginWork = ReactFiberBeginWork(config, hostContext, hydrationContext, scheduleUpdate, getPriorityContext),
      beginWork = _ReactFiberBeginWork.beginWork,
      beginFailedWork = _ReactFiberBeginWork.beginFailedWork;

  var _ReactFiberCompleteWo = ReactFiberCompleteWork(config, hostContext, hydrationContext),
      completeWork = _ReactFiberCompleteWo.completeWork;

  var _ReactFiberCommitWork = ReactFiberCommitWork(config, captureError),
      commitPlacement = _ReactFiberCommitWork.commitPlacement,
      commitDeletion = _ReactFiberCommitWork.commitDeletion,
      commitWork = _ReactFiberCommitWork.commitWork,
      commitLifeCycles = _ReactFiberCommitWork.commitLifeCycles,
      commitAttachRef = _ReactFiberCommitWork.commitAttachRef,
      commitDetachRef = _ReactFiberCommitWork.commitDetachRef;

  var scheduleDeferredCallback = config.scheduleDeferredCallback,
      useSyncScheduling = config.useSyncScheduling,
      prepareForCommit = config.prepareForCommit,
      resetAfterCommit = config.resetAfterCommit;

  // The priority level to use when scheduling an update. We use NoWork to
  // represent the default priority.
  // TODO: Should we change this to an array instead of using the call stack?
  // Might be less confusing.

  var priorityContext = NoWork$2;

  // Keeps track of whether we're currently in a work loop.
  var isPerformingWork = false;

  // Keeps track of whether the current deadline has expired.
  var deadlineHasExpired = false;

  // Keeps track of whether we should should batch sync updates.
  var isBatchingUpdates = false;

  // This is needed for the weird case where the initial mount is synchronous
  // even inside batchedUpdates :(
  var isUnbatchingUpdates = false;

  // The next work in progress fiber that we're currently working on.
  var nextUnitOfWork = null;
  var nextPriorityLevel = NoWork$2;

  // The next fiber with an effect that we're currently committing.
  var nextEffect = null;

  var pendingCommit = null;

  // Linked list of roots with scheduled work on them.
  var nextScheduledRoot = null;
  var lastScheduledRoot = null;

  // Keep track of which host environment callbacks are scheduled.
  var isCallbackScheduled = false;

  // Keep track of which fibers have captured an error that need to be handled.
  // Work is removed from this collection after componentDidCatch is called.
  var capturedErrors = null;
  // Keep track of which fibers have failed during the current batch of work.
  // This is a different set than capturedErrors, because it is not reset until
  // the end of the batch. This is needed to propagate errors correctly if a
  // subtree fails more than once.
  var failedBoundaries = null;
  // Error boundaries that captured an error during the current commit.
  var commitPhaseBoundaries = null;
  var firstUncaughtError = null;
  var didFatal = false;

  var isCommitting = false;
  var isUnmounting = false;

  // Use these to prevent an infinite loop of nested updates
  var NESTED_UPDATE_LIMIT = 1000;
  var nestedUpdateCount = 0;
  var nextRenderedTree = null;

  function resetContextStack() {
    // Reset the stack
    reset$1();
    // Reset the cursors
    resetContext$1();
    resetHostContainer();
  }

  // resetNextUnitOfWork mutates the current priority context. It is reset after
  // after the workLoop exits, so never call resetNextUnitOfWork from outside
  // the work loop.
  function resetNextUnitOfWork() {
    // Clear out roots with no more work on them, or if they have uncaught errors
    while (nextScheduledRoot !== null && nextScheduledRoot.current.pendingWorkPriority === NoWork$2) {
      // Unschedule this root.
      nextScheduledRoot.isScheduled = false;
      // Read the next pointer now.
      // We need to clear it in case this root gets scheduled again later.
      var next = nextScheduledRoot.nextScheduledRoot;
      nextScheduledRoot.nextScheduledRoot = null;
      // Exit if we cleared all the roots and there's no work to do.
      if (nextScheduledRoot === lastScheduledRoot) {
        nextScheduledRoot = null;
        lastScheduledRoot = null;
        nextPriorityLevel = NoWork$2;
        return null;
      }
      // Continue with the next root.
      // If there's no work on it, it will get unscheduled too.
      nextScheduledRoot = next;
    }

    var root = nextScheduledRoot;
    var highestPriorityRoot = null;
    var highestPriorityLevel = NoWork$2;
    while (root !== null) {
      if (root.current.pendingWorkPriority !== NoWork$2 && (highestPriorityLevel === NoWork$2 || highestPriorityLevel > root.current.pendingWorkPriority)) {
        highestPriorityLevel = root.current.pendingWorkPriority;
        highestPriorityRoot = root;
      }
      // We didn't find anything to do in this root, so let's try the next one.
      root = root.nextScheduledRoot;
    }
    if (highestPriorityRoot !== null) {
      nextPriorityLevel = highestPriorityLevel;
      // Before we start any new work, let's make sure that we have a fresh
      // stack to work from.
      // TODO: This call is buried a bit too deep. It would be nice to have
      // a single point which happens right before any new work and
      // unfortunately this is it.
      resetContextStack();

      nextUnitOfWork = createWorkInProgress$1(highestPriorityRoot.current, highestPriorityLevel);
      if (highestPriorityRoot !== nextRenderedTree) {
        // We've switched trees. Reset the nested update counter.
        nestedUpdateCount = 0;
        nextRenderedTree = highestPriorityRoot;
      }
      return;
    }

    nextPriorityLevel = NoWork$2;
    nextUnitOfWork = null;
    nextRenderedTree = null;
    return;
  }

  function commitAllHostEffects() {
    while (nextEffect !== null) {
      var effectTag = nextEffect.effectTag;
      if (effectTag & ContentReset) {
        config.resetTextContent(nextEffect.stateNode);
      }

      if (effectTag & Ref) {
        var current = nextEffect.alternate;
        if (current !== null) {
          commitDetachRef(current);
        }
      }

      // The following switch statement is only concerned about placement,
      // updates, and deletions. To avoid needing to add a case for every
      // possible bitmap value, we remove the secondary effects from the
      // effect tag and switch on that value.
      var primaryEffectTag = effectTag & ~(Callback | Err | ContentReset | Ref | PerformedWork);
      switch (primaryEffectTag) {
        case Placement$1:
          {
            commitPlacement(nextEffect);
            // Clear the "placement" from effect tag so that we know that this is inserted, before
            // any life-cycles like componentDidMount gets called.
            // TODO: findDOMNode doesn't rely on this any more but isMounted
            // does and isMounted is deprecated anyway so we should be able
            // to kill this.
            nextEffect.effectTag &= ~Placement$1;
            break;
          }
        case PlacementAndUpdate:
          {
            // Placement
            commitPlacement(nextEffect);
            // Clear the "placement" from effect tag so that we know that this is inserted, before
            // any life-cycles like componentDidMount gets called.
            nextEffect.effectTag &= ~Placement$1;

            // Update
            var _current = nextEffect.alternate;
            commitWork(_current, nextEffect);
            break;
          }
        case Update:
          {
            var _current2 = nextEffect.alternate;
            commitWork(_current2, nextEffect);
            break;
          }
        case Deletion:
          {
            isUnmounting = true;
            commitDeletion(nextEffect);
            isUnmounting = false;
            break;
          }
      }
      nextEffect = nextEffect.nextEffect;
    }

    
  }

  function commitAllLifeCycles() {
    while (nextEffect !== null) {
      var effectTag = nextEffect.effectTag;

      // Use Task priority for lifecycle updates
      if (effectTag & (Update | Callback)) {
        var current = nextEffect.alternate;
        commitLifeCycles(current, nextEffect);
      }

      if (effectTag & Ref) {
        commitAttachRef(nextEffect);
      }

      if (effectTag & Err) {
        commitErrorHandling(nextEffect);
      }

      var next = nextEffect.nextEffect;
      // Ensure that we clean these up so that we don't accidentally keep them.
      // I'm not actually sure this matters because we can't reset firstEffect
      // and lastEffect since they're on every node, not just the effectful
      // ones. So we have to clean everything as we reuse nodes anyway.
      nextEffect.nextEffect = null;
      // Ensure that we reset the effectTag here so that we can rely on effect
      // tags to reason about the current life-cycle.
      nextEffect = next;
    }
  }

  function commitAllWork(finishedWork) {
    // We keep track of this so that captureError can collect any boundaries
    // that capture an error during the commit phase. The reason these aren't
    // local to this function is because errors that occur during cWU are
    // captured elsewhere, to prevent the unmount from being interrupted.
    isCommitting = true;
    pendingCommit = null;
    var root = finishedWork.stateNode;
    !(root.current !== finishedWork) ? reactProdInvariant_1('177') : void 0;

    if (nextPriorityLevel === SynchronousPriority$1 || nextPriorityLevel === TaskPriority$1) {
      // Keep track of the number of iterations to prevent an infinite
      // update loop.
      nestedUpdateCount++;
    }

    // Reset this to null before calling lifecycles
    ReactCurrentOwner$2.current = null;

    var firstEffect = void 0;
    if (finishedWork.effectTag > PerformedWork) {
      // A fiber's effect list consists only of its children, not itself. So if
      // the root has an effect, we need to add it to the end of the list. The
      // resulting list is the set that would belong to the root's parent, if
      // it had one; that is, all the effects in the tree including the root.
      if (finishedWork.lastEffect !== null) {
        finishedWork.lastEffect.nextEffect = finishedWork;
        firstEffect = finishedWork.firstEffect;
      } else {
        firstEffect = finishedWork;
      }
    } else {
      // There is no effect on the root.
      firstEffect = finishedWork.firstEffect;
    }

    prepareForCommit();

    // Commit all the side-effects within a tree. We'll do this in two passes.
    // The first pass performs all the host insertions, updates, deletions and
    // ref unmounts.
    nextEffect = firstEffect;
    while (nextEffect !== null) {
      var didError = false;
      var _error = void 0;
      {
        try {
          commitAllHostEffects();
        } catch (e) {
          didError = true;
          _error = e;
        }
      }
      if (didError) {
        !(nextEffect !== null) ? reactProdInvariant_1('178') : void 0;
        captureError(nextEffect, _error);
        // Clean-up
        if (nextEffect !== null) {
          nextEffect = nextEffect.nextEffect;
        }
      }
    }
    resetAfterCommit();

    // The work-in-progress tree is now the current tree. This must come after
    // the first pass of the commit phase, so that the previous tree is still
    // current during componentWillUnmount, but before the second pass, so that
    // the finished work is current during componentDidMount/Update.
    root.current = finishedWork;

    // In the second pass we'll perform all life-cycles and ref callbacks.
    // Life-cycles happen as a separate pass so that all placements, updates,
    // and deletions in the entire tree have already been invoked.
    // This pass also triggers any renderer-specific initial effects.
    nextEffect = firstEffect;
    while (nextEffect !== null) {
      var _didError = false;
      var _error2 = void 0;
      {
        try {
          commitAllLifeCycles();
        } catch (e) {
          _didError = true;
          _error2 = e;
        }
      }
      if (_didError) {
        !(nextEffect !== null) ? reactProdInvariant_1('178') : void 0;
        captureError(nextEffect, _error2);
        if (nextEffect !== null) {
          nextEffect = nextEffect.nextEffect;
        }
      }
    }

    isCommitting = false;
    if (typeof onCommitRoot === 'function') {
      onCommitRoot(finishedWork.stateNode);
    }
    if (false && ReactFiberInstrumentation$1.debugTool) {
      ReactFiberInstrumentation$1.debugTool.onCommitWork(finishedWork);
    }

    // If we caught any errors during this commit, schedule their boundaries
    // to update.
    if (commitPhaseBoundaries) {
      commitPhaseBoundaries.forEach(scheduleErrorRecovery);
      commitPhaseBoundaries = null;
    }

    // This tree is done. Reset the unit of work pointer to the next highest
    // priority root. If there's no more work left, the pointer is set to null.
    resetNextUnitOfWork();
  }

  function resetWorkPriority(workInProgress, renderPriority) {
    if (workInProgress.pendingWorkPriority !== NoWork$2 && workInProgress.pendingWorkPriority > renderPriority) {
      // This was a down-prioritization. Don't bubble priority from children.
      return;
    }

    // Check for pending update priority.
    var newPriority = getUpdatePriority$1(workInProgress);

    // TODO: Coroutines need to visit stateNode

    var child = workInProgress.child;
    while (child !== null) {
      // Ensure that remaining work priority bubbles up.
      newPriority = largerPriority$1(newPriority, child.pendingWorkPriority);
      child = child.sibling;
    }
    workInProgress.pendingWorkPriority = newPriority;
  }

  function completeUnitOfWork(workInProgress) {
    while (true) {
      // The current, flushed, state of this fiber is the alternate.
      // Ideally nothing should rely on this, but relying on it here
      // means that we don't need an additional field on the work in
      // progress.
      var current = workInProgress.alternate;
      var next = completeWork(current, workInProgress, nextPriorityLevel);
      var returnFiber = workInProgress['return'];
      var siblingFiber = workInProgress.sibling;

      resetWorkPriority(workInProgress, nextPriorityLevel);

      if (next !== null) {
        if (false && ReactFiberInstrumentation$1.debugTool) {
          ReactFiberInstrumentation$1.debugTool.onCompleteWork(workInProgress);
        }
        // If completing this work spawned new work, do that next. We'll come
        // back here again.
        return next;
      }

      if (returnFiber !== null) {
        // Append all the effects of the subtree and this fiber onto the effect
        // list of the parent. The completion order of the children affects the
        // side-effect order.
        if (returnFiber.firstEffect === null) {
          returnFiber.firstEffect = workInProgress.firstEffect;
        }
        if (workInProgress.lastEffect !== null) {
          if (returnFiber.lastEffect !== null) {
            returnFiber.lastEffect.nextEffect = workInProgress.firstEffect;
          }
          returnFiber.lastEffect = workInProgress.lastEffect;
        }

        // If this fiber had side-effects, we append it AFTER the children's
        // side-effects. We can perform certain side-effects earlier if
        // needed, by doing multiple passes over the effect list. We don't want
        // to schedule our own side-effect on our own list because if end up
        // reusing children we'll schedule this effect onto itself since we're
        // at the end.
        var effectTag = workInProgress.effectTag;
        // Skip both NoWork and PerformedWork tags when creating the effect list.
        // PerformedWork effect is read by React DevTools but shouldn't be committed.
        if (effectTag > PerformedWork) {
          if (returnFiber.lastEffect !== null) {
            returnFiber.lastEffect.nextEffect = workInProgress;
          } else {
            returnFiber.firstEffect = workInProgress;
          }
          returnFiber.lastEffect = workInProgress;
        }
      }

      if (false && ReactFiberInstrumentation$1.debugTool) {
        ReactFiberInstrumentation$1.debugTool.onCompleteWork(workInProgress);
      }

      if (siblingFiber !== null) {
        // If there is more work to do in this returnFiber, do that next.
        return siblingFiber;
      } else if (returnFiber !== null) {
        // If there's no more work in this returnFiber. Complete the returnFiber.
        workInProgress = returnFiber;
        continue;
      } else {
        // We've reached the root. Mark the root as pending commit. Depending
        // on how much time we have left, we'll either commit it now or in
        // the next frame.
        pendingCommit = workInProgress;
        return null;
      }
    }

    // Without this explicit null return Flow complains of invalid return type
    // TODO Remove the above while(true) loop
    // eslint-disable-next-line no-unreachable
    return null;
  }

  function performUnitOfWork(workInProgress) {
    // The current, flushed, state of this fiber is the alternate.
    // Ideally nothing should rely on this, but relying on it here
    // means that we don't need an additional field on the work in
    // progress.
    var current = workInProgress.alternate;

    // See if beginning this work spawns more work.
    var next = beginWork(current, workInProgress, nextPriorityLevel);
    if (false && ReactFiberInstrumentation$1.debugTool) {
      ReactFiberInstrumentation$1.debugTool.onBeginWork(workInProgress);
    }

    if (next === null) {
      // If this doesn't spawn new work, complete the current work.
      next = completeUnitOfWork(workInProgress);
    }

    ReactCurrentOwner$2.current = null;

    return next;
  }

  function performFailedUnitOfWork(workInProgress) {
    // The current, flushed, state of this fiber is the alternate.
    // Ideally nothing should rely on this, but relying on it here
    // means that we don't need an additional field on the work in
    // progress.
    var current = workInProgress.alternate;

    // See if beginning this work spawns more work.
    var next = beginFailedWork(current, workInProgress, nextPriorityLevel);
    if (false && ReactFiberInstrumentation$1.debugTool) {
      ReactFiberInstrumentation$1.debugTool.onBeginWork(workInProgress);
    }

    if (next === null) {
      // If this doesn't spawn new work, complete the current work.
      next = completeUnitOfWork(workInProgress);
    }

    ReactCurrentOwner$2.current = null;

    return next;
  }

  function performDeferredWork(deadline) {
    performWork(OffscreenPriority, deadline);
  }

  function handleCommitPhaseErrors() {
    // This is a special work loop for handling commit phase errors. It's
    // similar to the syncrhonous work loop, but does an additional check on
    // each fiber to see if it's an error boundary with an unhandled error. If
    // so, it uses a forked version of performUnitOfWork that unmounts the
    // failed subtree.
    //
    // The loop stops once the children have unmounted and error lifecycles are
    // called. Then we return to the regular flow.

    if (capturedErrors !== null && capturedErrors.size > 0 && nextPriorityLevel === TaskPriority$1) {
      while (nextUnitOfWork !== null) {
        if (hasCapturedError(nextUnitOfWork)) {
          // Use a forked version of performUnitOfWork
          nextUnitOfWork = performFailedUnitOfWork(nextUnitOfWork);
        } else {
          nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
        }
        if (nextUnitOfWork === null) {
          !(pendingCommit !== null) ? reactProdInvariant_1('179') : void 0;
          // We just completed a root. Commit it now.
          priorityContext = TaskPriority$1;
          commitAllWork(pendingCommit);
          priorityContext = nextPriorityLevel;

          if (capturedErrors === null || capturedErrors.size === 0 || nextPriorityLevel !== TaskPriority$1) {
            // There are no more unhandled errors. We can exit this special
            // work loop. If there's still additional work, we'll perform it
            // using one of the normal work loops.
            break;
          }
          // The commit phase produced additional errors. Continue working.
        }
      }
    }
  }

  function workLoop(minPriorityLevel, deadline) {
    if (pendingCommit !== null) {
      priorityContext = TaskPriority$1;
      commitAllWork(pendingCommit);
      handleCommitPhaseErrors();
    } else if (nextUnitOfWork === null) {
      resetNextUnitOfWork();
    }

    if (nextPriorityLevel === NoWork$2 || nextPriorityLevel > minPriorityLevel) {
      return;
    }

    // During the render phase, updates should have the same priority at which
    // we're rendering.
    priorityContext = nextPriorityLevel;

    loop: do {
      if (nextPriorityLevel <= TaskPriority$1) {
        // Flush all synchronous and task work.
        while (nextUnitOfWork !== null) {
          nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
          if (nextUnitOfWork === null) {
            !(pendingCommit !== null) ? reactProdInvariant_1('179') : void 0;
            // We just completed a root. Commit it now.
            priorityContext = TaskPriority$1;
            commitAllWork(pendingCommit);
            priorityContext = nextPriorityLevel;
            // Clear any errors that were scheduled during the commit phase.
            handleCommitPhaseErrors();
            // The priority level may have changed. Check again.
            if (nextPriorityLevel === NoWork$2 || nextPriorityLevel > minPriorityLevel || nextPriorityLevel > TaskPriority$1) {
              // The priority level does not match.
              break;
            }
          }
        }
      } else if (deadline !== null) {
        // Flush asynchronous work until the deadline expires.
        while (nextUnitOfWork !== null && !deadlineHasExpired) {
          if (deadline.timeRemaining() > timeHeuristicForUnitOfWork) {
            nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
            // In a deferred work batch, iff nextUnitOfWork returns null, we just
            // completed a root and a pendingCommit exists. Logically, we could
            // omit either of the checks in the following condition, but we need
            // both to satisfy Flow.
            if (nextUnitOfWork === null) {
              !(pendingCommit !== null) ? reactProdInvariant_1('179') : void 0;
              // We just completed a root. If we have time, commit it now.
              // Otherwise, we'll commit it in the next frame.
              if (deadline.timeRemaining() > timeHeuristicForUnitOfWork) {
                priorityContext = TaskPriority$1;
                commitAllWork(pendingCommit);
                priorityContext = nextPriorityLevel;
                // Clear any errors that were scheduled during the commit phase.
                handleCommitPhaseErrors();
                // The priority level may have changed. Check again.
                if (nextPriorityLevel === NoWork$2 || nextPriorityLevel > minPriorityLevel || nextPriorityLevel < HighPriority) {
                  // The priority level does not match.
                  break;
                }
              } else {
                deadlineHasExpired = true;
              }
            }
          } else {
            deadlineHasExpired = true;
          }
        }
      }

      // There might be work left. Depending on the priority, we should
      // either perform it now or schedule a callback to perform it later.
      switch (nextPriorityLevel) {
        case SynchronousPriority$1:
        case TaskPriority$1:
          // We have remaining synchronous or task work. Keep performing it,
          // regardless of whether we're inside a callback.
          if (nextPriorityLevel <= minPriorityLevel) {
            continue loop;
          }
          break loop;
        case HighPriority:
        case LowPriority:
        case OffscreenPriority:
          // We have remaining async work.
          if (deadline === null) {
            // We're not inside a callback. Exit and perform the work during
            // the next callback.
            break loop;
          }
          // We are inside a callback.
          if (!deadlineHasExpired && nextPriorityLevel <= minPriorityLevel) {
            // We still have time. Keep working.
            continue loop;
          }
          // We've run out of time. Exit.
          break loop;
        case NoWork$2:
          // No work left. We can exit.
          break loop;
        default:
          reactProdInvariant_1('181');
      }
    } while (true);
  }

  function performWorkCatchBlock(failedWork, boundary, minPriorityLevel, deadline) {
    // We're going to restart the error boundary that captured the error.
    // Conceptually, we're unwinding the stack. We need to unwind the
    // context stack, too.
    unwindContexts(failedWork, boundary);

    // Restart the error boundary using a forked version of
    // performUnitOfWork that deletes the boundary's children. The entire
    // failed subree will be unmounted. During the commit phase, a special
    // lifecycle method is called on the error boundary, which triggers
    // a re-render.
    nextUnitOfWork = performFailedUnitOfWork(boundary);

    // Continue working.
    workLoop(minPriorityLevel, deadline);
  }

  function performWork(minPriorityLevel, deadline) {
    !!isPerformingWork ? reactProdInvariant_1('182') : void 0;
    isPerformingWork = true;

    // The priority context changes during the render phase. We'll need to
    // reset it at the end.
    var previousPriorityContext = priorityContext;

    var didError = false;
    var error = null;
    {
      try {
        workLoop(minPriorityLevel, deadline);
      } catch (e) {
        didError = true;
        error = e;
      }
    }

    // An error was thrown during the render phase.
    while (didError) {
      if (didFatal) {
        // This was a fatal error. Don't attempt to recover from it.
        firstUncaughtError = error;
        break;
      }

      var failedWork = nextUnitOfWork;
      if (failedWork === null) {
        // An error was thrown but there's no current unit of work. This can
        // happen during the commit phase if there's a bug in the renderer.
        didFatal = true;
        continue;
      }

      // "Capture" the error by finding the nearest boundary. If there is no
      // error boundary, we use the root.
      var boundary = captureError(failedWork, error);
      !(boundary !== null) ? reactProdInvariant_1('183') : void 0;

      if (didFatal) {
        // The error we just captured was a fatal error. This happens
        // when the error propagates to the root more than once.
        continue;
      }

      didError = false;
      error = null;
      {
        try {
          performWorkCatchBlock(failedWork, boundary, minPriorityLevel, deadline);
          error = null;
        } catch (e) {
          didError = true;
          error = e;
          continue;
        }
      }
      // We're finished working. Exit the error loop.
      break;
    }

    // Reset the priority context to its previous value.
    priorityContext = previousPriorityContext;

    // If we're inside a callback, set this to false, since we just flushed it.
    if (deadline !== null) {
      isCallbackScheduled = false;
    }
    // If there's remaining async work, make sure we schedule another callback.
    if (nextPriorityLevel > TaskPriority$1 && !isCallbackScheduled) {
      scheduleDeferredCallback(performDeferredWork);
      isCallbackScheduled = true;
    }

    var errorToThrow = firstUncaughtError;

    // We're done performing work. Time to clean up.
    isPerformingWork = false;
    deadlineHasExpired = false;
    didFatal = false;
    firstUncaughtError = null;
    capturedErrors = null;
    failedBoundaries = null;
    nextRenderedTree = null;
    nestedUpdateCount = 0;

    if (errorToThrow !== null) {
      throw errorToThrow;
    }
  }

  // Returns the boundary that captured the error, or null if the error is ignored
  function captureError(failedWork, error) {
    // It is no longer valid because we exited the user code.
    ReactCurrentOwner$2.current = null;
    var boundary = null;

    // Passed to logCapturedError()
    var errorBoundaryFound = false;
    var willRetry = false;
    var errorBoundaryName = null;

    // Host containers are a special case. If the failed work itself is a host
    // container, then it acts as its own boundary. In all other cases, we
    // ignore the work itself and only search through the parents.
    if (failedWork.tag === HostRoot$5) {
      boundary = failedWork;

      if (isFailedBoundary(failedWork)) {
        // If this root already failed, there must have been an error when
        // attempting to unmount it. This is a worst-case scenario and
        // should only be possible if there's a bug in the renderer.
        didFatal = true;
      }
    } else {
      var node = failedWork['return'];
      while (node !== null && boundary === null) {
        if (node.tag === ClassComponent$4) {
          var instance = node.stateNode;
          if (typeof instance.componentDidCatch === 'function') {
            errorBoundaryFound = true;
            errorBoundaryName = getComponentName_1(node);

            // Found an error boundary!
            boundary = node;
            willRetry = true;
          }
        } else if (node.tag === HostRoot$5) {
          // Treat the root like a no-op error boundary
          boundary = node;
        }

        if (isFailedBoundary(node)) {
          // This boundary is already in a failed state.

          // If we're currently unmounting, that means this error was
          // thrown while unmounting a failed subtree. We should ignore
          // the error.
          if (isUnmounting) {
            return null;
          }

          // If we're in the commit phase, we should check to see if
          // this boundary already captured an error during this commit.
          // This case exists because multiple errors can be thrown during
          // a single commit without interruption.
          if (commitPhaseBoundaries !== null && (commitPhaseBoundaries.has(node) || node.alternate !== null && commitPhaseBoundaries.has(node.alternate))) {
            // If so, we should ignore this error.
            return null;
          }

          // The error should propagate to the next boundary -— we keep looking.
          boundary = null;
          willRetry = false;
        }

        node = node['return'];
      }
    }

    if (boundary !== null) {
      // Add to the collection of failed boundaries. This lets us know that
      // subsequent errors in this subtree should propagate to the next boundary.
      if (failedBoundaries === null) {
        failedBoundaries = new Set();
      }
      failedBoundaries.add(boundary);

      // This method is unsafe outside of the begin and complete phases.
      // We might be in the commit phase when an error is captured.
      // The risk is that the return path from this Fiber may not be accurate.
      // That risk is acceptable given the benefit of providing users more context.
      var _componentStack = getStackAddendumByWorkInProgressFiber$1(failedWork);
      var _componentName = getComponentName_1(failedWork);

      // Add to the collection of captured errors. This is stored as a global
      // map of errors and their component stack location keyed by the boundaries
      // that capture them. We mostly use this Map as a Set; it's a Map only to
      // avoid adding a field to Fiber to store the error.
      if (capturedErrors === null) {
        capturedErrors = new Map();
      }

      var capturedError = {
        componentName: _componentName,
        componentStack: _componentStack,
        error: error,
        errorBoundary: errorBoundaryFound ? boundary.stateNode : null,
        errorBoundaryFound: errorBoundaryFound,
        errorBoundaryName: errorBoundaryName,
        willRetry: willRetry
      };

      capturedErrors.set(boundary, capturedError);

      try {
        logCapturedError(capturedError);
      } catch (e) {
        // Prevent cycle if logCapturedError() throws.
        // A cycle may still occur if logCapturedError renders a component that throws.
        console.error(e);
      }

      // If we're in the commit phase, defer scheduling an update on the
      // boundary until after the commit is complete
      if (isCommitting) {
        if (commitPhaseBoundaries === null) {
          commitPhaseBoundaries = new Set();
        }
        commitPhaseBoundaries.add(boundary);
      } else {
        // Otherwise, schedule an update now.
        // TODO: Is this actually necessary during the render phase? Is it
        // possible to unwind and continue rendering at the same priority,
        // without corrupting internal state?
        scheduleErrorRecovery(boundary);
      }
      return boundary;
    } else if (firstUncaughtError === null) {
      // If no boundary is found, we'll need to throw the error
      firstUncaughtError = error;
    }
    return null;
  }

  function hasCapturedError(fiber) {
    // TODO: capturedErrors should store the boundary instance, to avoid needing
    // to check the alternate.
    return capturedErrors !== null && (capturedErrors.has(fiber) || fiber.alternate !== null && capturedErrors.has(fiber.alternate));
  }

  function isFailedBoundary(fiber) {
    // TODO: failedBoundaries should store the boundary instance, to avoid
    // needing to check the alternate.
    return failedBoundaries !== null && (failedBoundaries.has(fiber) || fiber.alternate !== null && failedBoundaries.has(fiber.alternate));
  }

  function commitErrorHandling(effectfulFiber) {
    var capturedError = void 0;
    if (capturedErrors !== null) {
      capturedError = capturedErrors.get(effectfulFiber);
      capturedErrors['delete'](effectfulFiber);
      if (capturedError == null) {
        if (effectfulFiber.alternate !== null) {
          effectfulFiber = effectfulFiber.alternate;
          capturedError = capturedErrors.get(effectfulFiber);
          capturedErrors['delete'](effectfulFiber);
        }
      }
    }

    !(capturedError != null) ? reactProdInvariant_1('184') : void 0;

    switch (effectfulFiber.tag) {
      case ClassComponent$4:
        var instance = effectfulFiber.stateNode;

        var info = {
          componentStack: capturedError.componentStack
        };

        // Allow the boundary to handle the error, usually by scheduling
        // an update to itself
        instance.componentDidCatch(capturedError.error, info);
        return;
      case HostRoot$5:
        if (firstUncaughtError === null) {
          // If this is the host container, we treat it as a no-op error
          // boundary. We'll throw the first uncaught error once it's safe to
          // do so, at the end of the batch.
          firstUncaughtError = capturedError.error;
        }
        return;
      default:
        reactProdInvariant_1('157');
    }
  }

  function unwindContexts(from, to) {
    var node = from;
    while (node !== null) {
      switch (node.tag) {
        case ClassComponent$4:
          popContextProvider$1(node);
          break;
        case HostComponent$4:
          popHostContext(node);
          break;
        case HostRoot$5:
          popHostContainer(node);
          break;
        case HostPortal$2:
          popHostContainer(node);
          break;
      }
      if (node === to || node.alternate === to) {
        break;
      } else {}
      node = node['return'];
    }
  }

  function scheduleRoot(root, priorityLevel) {
    if (priorityLevel === NoWork$2) {
      return;
    }

    if (!root.isScheduled) {
      root.isScheduled = true;
      if (lastScheduledRoot) {
        // Schedule ourselves to the end.
        lastScheduledRoot.nextScheduledRoot = root;
        lastScheduledRoot = root;
      } else {
        // We're the only work scheduled.
        nextScheduledRoot = root;
        lastScheduledRoot = root;
      }
    }
  }

  function scheduleUpdate(fiber, priorityLevel) {
    return scheduleUpdateImpl(fiber, priorityLevel, false);
  }

  function scheduleUpdateImpl(fiber, priorityLevel, isErrorRecovery) {
    if (nestedUpdateCount > NESTED_UPDATE_LIMIT) {
      didFatal = true;
      reactProdInvariant_1('185');
    }

    if (!isPerformingWork && priorityLevel <= nextPriorityLevel) {
      // We must reset the current unit of work pointer so that we restart the
      // search from the root during the next tick, in case there is now higher
      // priority work somewhere earlier than before.
      nextUnitOfWork = null;
    }

    var node = fiber;
    var shouldContinue = true;
    while (node !== null && shouldContinue) {
      // Walk the parent path to the root and update each node's priority. Once
      // we reach a node whose priority matches (and whose alternate's priority
      // matches) we can exit safely knowing that the rest of the path is correct.
      shouldContinue = false;
      if (node.pendingWorkPriority === NoWork$2 || node.pendingWorkPriority > priorityLevel) {
        // Priority did not match. Update and keep going.
        shouldContinue = true;
        node.pendingWorkPriority = priorityLevel;
      }
      if (node.alternate !== null) {
        if (node.alternate.pendingWorkPriority === NoWork$2 || node.alternate.pendingWorkPriority > priorityLevel) {
          // Priority did not match. Update and keep going.
          shouldContinue = true;
          node.alternate.pendingWorkPriority = priorityLevel;
        }
      }
      if (node['return'] === null) {
        if (node.tag === HostRoot$5) {
          var root = node.stateNode;
          scheduleRoot(root, priorityLevel);
          if (!isPerformingWork) {
            switch (priorityLevel) {
              case SynchronousPriority$1:
                // Perform this update now.
                if (isUnbatchingUpdates) {
                  // We're inside unbatchedUpdates, which is inside either
                  // batchedUpdates or a lifecycle. We should only flush
                  // synchronous work, not task work.
                  performWork(SynchronousPriority$1, null);
                } else {
                  // Flush both synchronous and task work.
                  performWork(TaskPriority$1, null);
                }
                break;
              case TaskPriority$1:
                !isBatchingUpdates ? reactProdInvariant_1('186') : void 0;
                break;
              default:
                // Schedule a callback to perform the work later.
                if (!isCallbackScheduled) {
                  scheduleDeferredCallback(performDeferredWork);
                  isCallbackScheduled = true;
                }
            }
          }
        } else {
          return;
        }
      }
      node = node['return'];
    }
  }

  function getPriorityContext(fiber, forceAsync) {
    var priorityLevel = priorityContext;
    if (priorityLevel === NoWork$2) {
      if (!useSyncScheduling || fiber.internalContextTag & AsyncUpdates || forceAsync) {
        priorityLevel = LowPriority;
      } else {
        priorityLevel = SynchronousPriority$1;
      }
    }

    // If we're in a batch, or if we're already performing work, downgrade sync
    // priority to task priority
    if (priorityLevel === SynchronousPriority$1 && (isPerformingWork || isBatchingUpdates)) {
      return TaskPriority$1;
    }
    return priorityLevel;
  }

  function scheduleErrorRecovery(fiber) {
    scheduleUpdateImpl(fiber, TaskPriority$1, true);
  }

  function batchedUpdates(fn, a) {
    var previousIsBatchingUpdates = isBatchingUpdates;
    isBatchingUpdates = true;
    try {
      return fn(a);
    } finally {
      isBatchingUpdates = previousIsBatchingUpdates;
      // If we're not already inside a batch, we need to flush any task work
      // that was created by the user-provided function.
      if (!isPerformingWork && !isBatchingUpdates) {
        performWork(TaskPriority$1, null);
      }
    }
  }

  function unbatchedUpdates(fn) {
    var previousIsUnbatchingUpdates = isUnbatchingUpdates;
    var previousIsBatchingUpdates = isBatchingUpdates;
    // This is only true if we're nested inside batchedUpdates.
    isUnbatchingUpdates = isBatchingUpdates;
    isBatchingUpdates = false;
    try {
      return fn();
    } finally {
      isBatchingUpdates = previousIsBatchingUpdates;
      isUnbatchingUpdates = previousIsUnbatchingUpdates;
    }
  }

  function flushSync(batch) {
    var previousIsBatchingUpdates = isBatchingUpdates;
    var previousPriorityContext = priorityContext;
    isBatchingUpdates = true;
    priorityContext = SynchronousPriority$1;
    try {
      return batch();
    } finally {
      isBatchingUpdates = previousIsBatchingUpdates;
      priorityContext = previousPriorityContext;

      !!isPerformingWork ? reactProdInvariant_1('187') : void 0;
      performWork(TaskPriority$1, null);
    }
  }

  function deferredUpdates(fn) {
    var previousPriorityContext = priorityContext;
    priorityContext = LowPriority;
    try {
      return fn();
    } finally {
      priorityContext = previousPriorityContext;
    }
  }

  return {
    scheduleUpdate: scheduleUpdate,
    getPriorityContext: getPriorityContext,
    batchedUpdates: batchedUpdates,
    unbatchedUpdates: unbatchedUpdates,
    flushSync: flushSync,
    deferredUpdates: deferredUpdates
  };
};

var addTopLevelUpdate = ReactFiberUpdateQueue.addTopLevelUpdate;

var findCurrentUnmaskedContext = ReactFiberContext.findCurrentUnmaskedContext;
var isContextProvider = ReactFiberContext.isContextProvider;
var processChildContext = ReactFiberContext.processChildContext;

var createFiberRoot = ReactFiberRoot.createFiberRoot;




var HostComponent$2 = ReactTypeOfWork.HostComponent;



var findCurrentHostFiber$1 = ReactFiberTreeReflection.findCurrentHostFiber;
var findCurrentHostFiberWithNoPortals$1 = ReactFiberTreeReflection.findCurrentHostFiberWithNoPortals;

function getContextForSubtree(parentComponent) {
  if (!parentComponent) {
    return emptyObject_1;
  }

  var fiber = ReactInstanceMap_1.get(parentComponent);
  var parentContext = findCurrentUnmaskedContext(fiber);
  return isContextProvider(fiber) ? processChildContext(fiber, parentContext) : parentContext;
}

var ReactFiberReconciler = function (config) {
  var getPublicInstance = config.getPublicInstance;

  var _ReactFiberScheduler = ReactFiberScheduler(config),
      scheduleUpdate = _ReactFiberScheduler.scheduleUpdate,
      getPriorityContext = _ReactFiberScheduler.getPriorityContext,
      batchedUpdates = _ReactFiberScheduler.batchedUpdates,
      unbatchedUpdates = _ReactFiberScheduler.unbatchedUpdates,
      flushSync = _ReactFiberScheduler.flushSync,
      deferredUpdates = _ReactFiberScheduler.deferredUpdates;

  function scheduleTopLevelUpdate(current, element, callback) {
    var forceAsync = ReactFeatureFlags_1.enableAsyncSubtreeAPI && element != null && element.type != null && element.type.prototype != null && element.type.prototype.unstable_isAsyncReactComponent === true;
    var priorityLevel = getPriorityContext(current, forceAsync);
    var nextState = { element: element };
    callback = callback === undefined ? null : callback;
    addTopLevelUpdate(current, nextState, callback, priorityLevel);
    scheduleUpdate(current, priorityLevel);
  }

  return {
    createContainer: function (containerInfo) {
      return createFiberRoot(containerInfo);
    },
    updateContainer: function (element, container, parentComponent, callback) {
      // TODO: If this is a nested container, this won't be the root.
      var current = container.current;

      var context = getContextForSubtree(parentComponent);
      if (container.context === null) {
        container.context = context;
      } else {
        container.pendingContext = context;
      }

      scheduleTopLevelUpdate(current, element, callback);
    },


    batchedUpdates: batchedUpdates,

    unbatchedUpdates: unbatchedUpdates,

    deferredUpdates: deferredUpdates,

    flushSync: flushSync,

    getPublicRootInstance: function (container) {
      var containerFiber = container.current;
      if (!containerFiber.child) {
        return null;
      }
      switch (containerFiber.child.tag) {
        case HostComponent$2:
          return getPublicInstance(containerFiber.child.stateNode);
        default:
          return containerFiber.child.stateNode;
      }
    },
    findHostInstance: function (fiber) {
      var hostFiber = findCurrentHostFiber$1(fiber);
      if (hostFiber === null) {
        return null;
      }
      return hostFiber.stateNode;
    },
    findHostInstanceWithNoPortals: function (fiber) {
      var hostFiber = findCurrentHostFiberWithNoPortals$1(fiber);
      if (hostFiber === null) {
        return null;
      }
      return hostFiber.stateNode;
    }
  };
};

var TEXT_NODE$3 = HTMLNodeType_1.TEXT_NODE;

/**
 * Given any node return the first leaf node without children.
 *
 * @param {DOMElement|DOMTextNode} node
 * @return {DOMElement|DOMTextNode}
 */


function getLeafNode(node) {
  while (node && node.firstChild) {
    node = node.firstChild;
  }
  return node;
}

/**
 * Get the next sibling within a container. This will walk up the
 * DOM if a node's siblings have been exhausted.
 *
 * @param {DOMElement|DOMTextNode} node
 * @return {?DOMElement|DOMTextNode}
 */
function getSiblingNode(node) {
  while (node) {
    if (node.nextSibling) {
      return node.nextSibling;
    }
    node = node.parentNode;
  }
}

/**
 * Get object describing the nodes which contain characters at offset.
 *
 * @param {DOMElement|DOMTextNode} root
 * @param {number} offset
 * @return {?object}
 */
function getNodeForCharacterOffset(root, offset) {
  var node = getLeafNode(root);
  var nodeStart = 0;
  var nodeEnd = 0;

  while (node) {
    if (node.nodeType === TEXT_NODE$3) {
      nodeEnd = nodeStart + node.textContent.length;

      if (nodeStart <= offset && nodeEnd >= offset) {
        return {
          node: node,
          offset: offset - nodeStart
        };
      }

      nodeStart = nodeEnd;
    }

    node = getLeafNode(getSiblingNode(node));
  }
}

var getNodeForCharacterOffset_1 = getNodeForCharacterOffset;

var contentKey = null;

/**
 * Gets the key used to access text content on a DOM node.
 *
 * @return {?string} Key used to access text content.
 * @internal
 */
function getTextContentAccessor() {
  if (!contentKey && ExecutionEnvironment_1.canUseDOM) {
    // Prefer textContent to innerText because many browsers support both but
    // SVG <text> elements don't support innerText even when <div> does.
    contentKey = 'textContent' in document.documentElement ? 'textContent' : 'innerText';
  }
  return contentKey;
}

var getTextContentAccessor_1 = getTextContentAccessor;

/**
 * While `isCollapsed` is available on the Selection object and `collapsed`
 * is available on the Range object, IE11 sometimes gets them wrong.
 * If the anchor/focus nodes and offsets are the same, the range is collapsed.
 */
function isCollapsed(anchorNode, anchorOffset, focusNode, focusOffset) {
  return anchorNode === focusNode && anchorOffset === focusOffset;
}

/**
 * @param {DOMElement} node
 * @return {?object}
 */
function getModernOffsets(node) {
  var selection = window.getSelection && window.getSelection();

  if (!selection || selection.rangeCount === 0) {
    return null;
  }

  var anchorNode = selection.anchorNode;
  var anchorOffset = selection.anchorOffset;
  var focusNode = selection.focusNode;
  var focusOffset = selection.focusOffset;

  var currentRange = selection.getRangeAt(0);

  // In Firefox, range.startContainer and range.endContainer can be "anonymous
  // divs", e.g. the up/down buttons on an <input type="number">. Anonymous
  // divs do not seem to expose properties, triggering a "Permission denied
  // error" if any of its properties are accessed. The only seemingly possible
  // way to avoid erroring is to access a property that typically works for
  // non-anonymous divs and catch any error that may otherwise arise. See
  // https://bugzilla.mozilla.org/show_bug.cgi?id=208427
  try {
    /* eslint-disable no-unused-expressions */
    currentRange.startContainer.nodeType;
    currentRange.endContainer.nodeType;
    /* eslint-enable no-unused-expressions */
  } catch (e) {
    return null;
  }

  // If the node and offset values are the same, the selection is collapsed.
  // `Selection.isCollapsed` is available natively, but IE sometimes gets
  // this value wrong.
  var isSelectionCollapsed = isCollapsed(selection.anchorNode, selection.anchorOffset, selection.focusNode, selection.focusOffset);

  var rangeLength = isSelectionCollapsed ? 0 : currentRange.toString().length;

  var tempRange = currentRange.cloneRange();
  tempRange.selectNodeContents(node);
  tempRange.setEnd(currentRange.startContainer, currentRange.startOffset);

  var isTempRangeCollapsed = isCollapsed(tempRange.startContainer, tempRange.startOffset, tempRange.endContainer, tempRange.endOffset);

  var start = isTempRangeCollapsed ? 0 : tempRange.toString().length;
  var end = start + rangeLength;

  // Detect whether the selection is backward.
  var detectionRange = document.createRange();
  detectionRange.setStart(anchorNode, anchorOffset);
  detectionRange.setEnd(focusNode, focusOffset);
  var isBackward = detectionRange.collapsed;

  return {
    start: isBackward ? end : start,
    end: isBackward ? start : end
  };
}

/**
 * In modern non-IE browsers, we can support both forward and backward
 * selections.
 *
 * Note: IE10+ supports the Selection object, but it does not support
 * the `extend` method, which means that even in modern IE, it's not possible
 * to programmatically create a backward selection. Thus, for all IE
 * versions, we use the old IE API to create our selections.
 *
 * @param {DOMElement|DOMTextNode} node
 * @param {object} offsets
 */
function setModernOffsets(node, offsets) {
  if (!window.getSelection) {
    return;
  }

  var selection = window.getSelection();
  var length = node[getTextContentAccessor_1()].length;
  var start = Math.min(offsets.start, length);
  var end = offsets.end === undefined ? start : Math.min(offsets.end, length);

  // IE 11 uses modern selection, but doesn't support the extend method.
  // Flip backward selections, so we can set with a single range.
  if (!selection.extend && start > end) {
    var temp = end;
    end = start;
    start = temp;
  }

  var startMarker = getNodeForCharacterOffset_1(node, start);
  var endMarker = getNodeForCharacterOffset_1(node, end);

  if (startMarker && endMarker) {
    var range = document.createRange();
    range.setStart(startMarker.node, startMarker.offset);
    selection.removeAllRanges();

    if (start > end) {
      selection.addRange(range);
      selection.extend(endMarker.node, endMarker.offset);
    } else {
      range.setEnd(endMarker.node, endMarker.offset);
      selection.addRange(range);
    }
  }
}

var ReactDOMSelection = {
  /**
   * @param {DOMElement} node
   */
  getOffsets: getModernOffsets,

  /**
   * @param {DOMElement|DOMTextNode} node
   * @param {object} offsets
   */
  setOffsets: setModernOffsets
};

var ReactDOMSelection_1 = ReactDOMSelection;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @typechecks
 */

/**
 * @param {*} object The object to check.
 * @return {boolean} Whether or not the object is a DOM node.
 */
function isNode(object) {
  var doc = object ? object.ownerDocument || object : document;
  var defaultView = doc.defaultView || window;
  return !!(object && (typeof defaultView.Node === 'function' ? object instanceof defaultView.Node : typeof object === 'object' && typeof object.nodeType === 'number' && typeof object.nodeName === 'string'));
}

var isNode_1 = isNode;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @typechecks
 */



/**
 * @param {*} object The object to check.
 * @return {boolean} Whether or not the object is a DOM text node.
 */
function isTextNode(object) {
  return isNode_1(object) && object.nodeType == 3;
}

var isTextNode_1 = isTextNode;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 */



/*eslint-disable no-bitwise */

/**
 * Checks if a given DOM node contains or is another DOM node.
 */
function containsNode(outerNode, innerNode) {
  if (!outerNode || !innerNode) {
    return false;
  } else if (outerNode === innerNode) {
    return true;
  } else if (isTextNode_1(outerNode)) {
    return false;
  } else if (isTextNode_1(innerNode)) {
    return containsNode(outerNode, innerNode.parentNode);
  } else if ('contains' in outerNode) {
    return outerNode.contains(innerNode);
  } else if (outerNode.compareDocumentPosition) {
    return !!(outerNode.compareDocumentPosition(innerNode) & 16);
  } else {
    return false;
  }
}

var containsNode_1 = containsNode;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

/**
 * @param {DOMElement} node input/textarea to focus
 */

function focusNode(node) {
  // IE8 can throw "Can't move focus to the control because it is invisible,
  // not enabled, or of a type that does not accept the focus." for all kinds of
  // reasons that are too expensive and fragile to test.
  try {
    node.focus();
  } catch (e) {}
}

var focusNode_1 = focusNode;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @typechecks
 */

/* eslint-disable fb-www/typeof-undefined */

/**
 * Same as document.activeElement but wraps in a try-catch block. In IE it is
 * not safe to call document.activeElement if there is nothing focused.
 *
 * The activeElement will be null only if the document or document body is not
 * yet defined.
 *
 * @param {?DOMDocument} doc Defaults to current document.
 * @return {?DOMElement}
 */
function getActiveElement(doc) /*?DOMElement*/{
  doc = doc || (typeof document !== 'undefined' ? document : undefined);
  if (typeof doc === 'undefined') {
    return null;
  }
  try {
    return doc.activeElement || doc.body;
  } catch (e) {
    return doc.body;
  }
}

var getActiveElement_1 = getActiveElement;

var ELEMENT_NODE$1 = HTMLNodeType_1.ELEMENT_NODE;





function isInDocument(node) {
  return containsNode_1(document.documentElement, node);
}

/**
 * @ReactInputSelection: React input selection module. Based on Selection.js,
 * but modified to be suitable for react and has a couple of bug fixes (doesn't
 * assume buttons have range selections allowed).
 * Input selection module for React.
 */
var ReactInputSelection = {
  hasSelectionCapabilities: function (elem) {
    var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();
    return nodeName && (nodeName === 'input' && elem.type === 'text' || nodeName === 'textarea' || elem.contentEditable === 'true');
  },

  getSelectionInformation: function () {
    var focusedElem = getActiveElement_1();
    return {
      focusedElem: focusedElem,
      selectionRange: ReactInputSelection.hasSelectionCapabilities(focusedElem) ? ReactInputSelection.getSelection(focusedElem) : null
    };
  },

  /**
   * @restoreSelection: If any selection information was potentially lost,
   * restore it. This is useful when performing operations that could remove dom
   * nodes and place them back in, resulting in focus being lost.
   */
  restoreSelection: function (priorSelectionInformation) {
    var curFocusedElem = getActiveElement_1();
    var priorFocusedElem = priorSelectionInformation.focusedElem;
    var priorSelectionRange = priorSelectionInformation.selectionRange;
    if (curFocusedElem !== priorFocusedElem && isInDocument(priorFocusedElem)) {
      if (ReactInputSelection.hasSelectionCapabilities(priorFocusedElem)) {
        ReactInputSelection.setSelection(priorFocusedElem, priorSelectionRange);
      }

      // Focusing a node can change the scroll position, which is undesirable
      var ancestors = [];
      var ancestor = priorFocusedElem;
      while (ancestor = ancestor.parentNode) {
        if (ancestor.nodeType === ELEMENT_NODE$1) {
          ancestors.push({
            element: ancestor,
            left: ancestor.scrollLeft,
            top: ancestor.scrollTop
          });
        }
      }

      focusNode_1(priorFocusedElem);

      for (var i = 0; i < ancestors.length; i++) {
        var info = ancestors[i];
        info.element.scrollLeft = info.left;
        info.element.scrollTop = info.top;
      }
    }
  },

  /**
   * @getSelection: Gets the selection bounds of a focused textarea, input or
   * contentEditable node.
   * -@input: Look up selection bounds of this input
   * -@return {start: selectionStart, end: selectionEnd}
   */
  getSelection: function (input) {
    var selection;

    if ('selectionStart' in input) {
      // Modern browser with input or textarea.
      selection = {
        start: input.selectionStart,
        end: input.selectionEnd
      };
    } else {
      // Content editable or old IE textarea.
      selection = ReactDOMSelection_1.getOffsets(input);
    }

    return selection || { start: 0, end: 0 };
  },

  /**
   * @setSelection: Sets the selection bounds of a textarea or input and focuses
   * the input.
   * -@input     Set selection bounds of this input or textarea
   * -@offsets   Object of same form that is returned from get*
   */
  setSelection: function (input, offsets) {
    var start = offsets.start;
    var end = offsets.end;
    if (end === undefined) {
      end = start;
    }

    if ('selectionStart' in input) {
      input.selectionStart = start;
      input.selectionEnd = Math.min(end, input.value.length);
    } else {
      ReactDOMSelection_1.setOffsets(input, offsets);
    }
  }
};

var ReactInputSelection_1 = ReactInputSelection;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactVersion
 */

var ReactVersion = '16.0.0';

var HostComponent$10 = ReactTypeOfWork.HostComponent;

function getParent(inst) {
  do {
    inst = inst['return'];
    // TODO: If this is a HostRoot we might want to bail out.
    // That is depending on if we want nested subtrees (layers) to bubble
    // events to their parent. We could also go through parentNode on the
    // host node but that wouldn't work for React Native and doesn't let us
    // do the portal feature.
  } while (inst && inst.tag !== HostComponent$10);
  if (inst) {
    return inst;
  }
  return null;
}

/**
 * Return the lowest common ancestor of A and B, or null if they are in
 * different trees.
 */
function getLowestCommonAncestor(instA, instB) {
  var depthA = 0;
  for (var tempA = instA; tempA; tempA = getParent(tempA)) {
    depthA++;
  }
  var depthB = 0;
  for (var tempB = instB; tempB; tempB = getParent(tempB)) {
    depthB++;
  }

  // If A is deeper, crawl up.
  while (depthA - depthB > 0) {
    instA = getParent(instA);
    depthA--;
  }

  // If B is deeper, crawl up.
  while (depthB - depthA > 0) {
    instB = getParent(instB);
    depthB--;
  }

  // Walk in lockstep until we find a match.
  var depth = depthA;
  while (depth--) {
    if (instA === instB || instA === instB.alternate) {
      return instA;
    }
    instA = getParent(instA);
    instB = getParent(instB);
  }
  return null;
}

/**
 * Return if A is an ancestor of B.
 */
function isAncestor(instA, instB) {
  while (instB) {
    if (instA === instB || instA === instB.alternate) {
      return true;
    }
    instB = getParent(instB);
  }
  return false;
}

/**
 * Return the parent instance of the passed-in instance.
 */
function getParentInstance(inst) {
  return getParent(inst);
}

/**
 * Simulates the traversal of a two-phase, capture/bubble event dispatch.
 */
function traverseTwoPhase(inst, fn, arg) {
  var path = [];
  while (inst) {
    path.push(inst);
    inst = getParent(inst);
  }
  var i;
  for (i = path.length; i-- > 0;) {
    fn(path[i], 'captured', arg);
  }
  for (i = 0; i < path.length; i++) {
    fn(path[i], 'bubbled', arg);
  }
}

/**
 * Traverses the ID hierarchy and invokes the supplied `cb` on any IDs that
 * should would receive a `mouseEnter` or `mouseLeave` event.
 *
 * Does not invoke the callback on the nearest common ancestor because nothing
 * "entered" or "left" that element.
 */
function traverseEnterLeave(from, to, fn, argFrom, argTo) {
  var common = from && to ? getLowestCommonAncestor(from, to) : null;
  var pathFrom = [];
  while (from && from !== common) {
    pathFrom.push(from);
    from = getParent(from);
  }
  var pathTo = [];
  while (to && to !== common) {
    pathTo.push(to);
    to = getParent(to);
  }
  var i;
  for (i = 0; i < pathFrom.length; i++) {
    fn(pathFrom[i], 'bubbled', argFrom);
  }
  for (i = pathTo.length; i-- > 0;) {
    fn(pathTo[i], 'captured', argTo);
  }
}

var ReactTreeTraversal = {
  isAncestor: isAncestor,
  getLowestCommonAncestor: getLowestCommonAncestor,
  getParentInstance: getParentInstance,
  traverseTwoPhase: traverseTwoPhase,
  traverseEnterLeave: traverseEnterLeave
};

var getListener = EventPluginHub_1.getListener;

/**
 * Some event types have a notion of different registration names for different
 * "phases" of propagation. This finds listeners by a given phase.
 */
function listenerAtPhase(inst, event, propagationPhase) {
  var registrationName = event.dispatchConfig.phasedRegistrationNames[propagationPhase];
  return getListener(inst, registrationName);
}

/**
 * Tags a `SyntheticEvent` with dispatched listeners. Creating this function
 * here, allows us to not have to bind or create functions for each event.
 * Mutating the event's members allows us to not have to create a wrapping
 * "dispatch" object that pairs the event with the listener.
 */
function accumulateDirectionalDispatches(inst, phase, event) {
  var listener = listenerAtPhase(inst, event, phase);
  if (listener) {
    event._dispatchListeners = accumulateInto_1(event._dispatchListeners, listener);
    event._dispatchInstances = accumulateInto_1(event._dispatchInstances, inst);
  }
}

/**
 * Collect dispatches (must be entirely collected before dispatching - see unit
 * tests). Lazily allocate the array to conserve memory.  We must loop through
 * each event and perform the traversal for each one. We cannot perform a
 * single traversal for the entire collection of events because each event may
 * have a different target.
 */
function accumulateTwoPhaseDispatchesSingle(event) {
  if (event && event.dispatchConfig.phasedRegistrationNames) {
    ReactTreeTraversal.traverseTwoPhase(event._targetInst, accumulateDirectionalDispatches, event);
  }
}

/**
 * Same as `accumulateTwoPhaseDispatchesSingle`, but skips over the targetID.
 */
function accumulateTwoPhaseDispatchesSingleSkipTarget(event) {
  if (event && event.dispatchConfig.phasedRegistrationNames) {
    var targetInst = event._targetInst;
    var parentInst = targetInst ? ReactTreeTraversal.getParentInstance(targetInst) : null;
    ReactTreeTraversal.traverseTwoPhase(parentInst, accumulateDirectionalDispatches, event);
  }
}

/**
 * Accumulates without regard to direction, does not look for phased
 * registration names. Same as `accumulateDirectDispatchesSingle` but without
 * requiring that the `dispatchMarker` be the same as the dispatched ID.
 */
function accumulateDispatches(inst, ignoredDirection, event) {
  if (inst && event && event.dispatchConfig.registrationName) {
    var registrationName = event.dispatchConfig.registrationName;
    var listener = getListener(inst, registrationName);
    if (listener) {
      event._dispatchListeners = accumulateInto_1(event._dispatchListeners, listener);
      event._dispatchInstances = accumulateInto_1(event._dispatchInstances, inst);
    }
  }
}

/**
 * Accumulates dispatches on an `SyntheticEvent`, but only for the
 * `dispatchMarker`.
 * @param {SyntheticEvent} event
 */
function accumulateDirectDispatchesSingle(event) {
  if (event && event.dispatchConfig.registrationName) {
    accumulateDispatches(event._targetInst, null, event);
  }
}

function accumulateTwoPhaseDispatches(events) {
  forEachAccumulated_1(events, accumulateTwoPhaseDispatchesSingle);
}

function accumulateTwoPhaseDispatchesSkipTarget(events) {
  forEachAccumulated_1(events, accumulateTwoPhaseDispatchesSingleSkipTarget);
}

function accumulateEnterLeaveDispatches(leave, enter, from, to) {
  ReactTreeTraversal.traverseEnterLeave(from, to, accumulateDispatches, leave, enter);
}

function accumulateDirectDispatches(events) {
  forEachAccumulated_1(events, accumulateDirectDispatchesSingle);
}

/**
 * A small set of propagation patterns, each of which will accept a small amount
 * of information, and generate a set of "dispatch ready event objects" - which
 * are sets of events that have already been annotated with a set of dispatched
 * listener functions/ids. The API is designed this way to discourage these
 * propagation strategies from actually executing the dispatches, since we
 * always want to collect the entire set of dispatches before executing even a
 * single one.
 *
 * @constructor EventPropagators
 */
var EventPropagators = {
  accumulateTwoPhaseDispatches: accumulateTwoPhaseDispatches,
  accumulateTwoPhaseDispatchesSkipTarget: accumulateTwoPhaseDispatchesSkipTarget,
  accumulateDirectDispatches: accumulateDirectDispatches,
  accumulateEnterLeaveDispatches: accumulateEnterLeaveDispatches
};

var EventPropagators_1 = EventPropagators;

/**
 * This helper object stores information about text content of a target node,
 * allowing comparison of content before and after a given event.
 *
 * Identify the node where selection currently begins, then observe
 * both its text content and its current position in the DOM. Since the
 * browser may natively replace the target node during composition, we can
 * use its position to find its replacement.
 * 
 *
 */
var compositionState = {
  _root: null,
  _startText: null,
  _fallbackText: null
};

var FallbackCompositionState = {
  initialize: function (nativeEventTarget) {
    compositionState._root = nativeEventTarget;
    compositionState._startText = FallbackCompositionState.getText();
    return true;
  },
  reset: function () {
    compositionState._root = null;
    compositionState._startText = null;
    compositionState._fallbackText = null;
  },
  getData: function () {
    if (compositionState._fallbackText) {
      return compositionState._fallbackText;
    }

    var start;
    var startValue = compositionState._startText;
    var startLength = startValue.length;
    var end;
    var endValue = FallbackCompositionState.getText();
    var endLength = endValue.length;

    for (start = 0; start < startLength; start++) {
      if (startValue[start] !== endValue[start]) {
        break;
      }
    }

    var minEnd = startLength - start;
    for (end = 1; end <= minEnd; end++) {
      if (startValue[startLength - end] !== endValue[endLength - end]) {
        break;
      }
    }

    var sliceTail = end > 1 ? 1 - end : undefined;
    compositionState._fallbackText = endValue.slice(start, sliceTail);
    return compositionState._fallbackText;
  },
  getText: function () {
    if ('value' in compositionState._root) {
      return compositionState._root.value;
    }
    return compositionState._root[getTextContentAccessor_1()];
  }
};

var FallbackCompositionState_1 = FallbackCompositionState;

var EVENT_POOL_SIZE = 10;

var shouldBeReleasedProperties = ['dispatchConfig', '_targetInst', 'nativeEvent', 'isDefaultPrevented', 'isPropagationStopped', '_dispatchListeners', '_dispatchInstances'];

/**
 * @interface Event
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */
var EventInterface = {
  type: null,
  target: null,
  // currentTarget is set when dispatching; no use in copying it here
  currentTarget: emptyFunction_1.thatReturnsNull,
  eventPhase: null,
  bubbles: null,
  cancelable: null,
  timeStamp: function (event) {
    return event.timeStamp || Date.now();
  },
  defaultPrevented: null,
  isTrusted: null
};

/**
 * Synthetic events are dispatched by event plugins, typically in response to a
 * top-level event delegation handler.
 *
 * These systems should generally use pooling to reduce the frequency of garbage
 * collection. The system should check `isPersistent` to determine whether the
 * event should be released into the pool after being dispatched. Users that
 * need a persisted event should invoke `persist`.
 *
 * Synthetic events (and subclasses) implement the DOM Level 3 Events API by
 * normalizing browser quirks. Subclasses do not necessarily have to implement a
 * DOM interface; custom application-specific events can also subclass this.
 *
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {*} targetInst Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @param {DOMEventTarget} nativeEventTarget Target node.
 */
function SyntheticEvent(dispatchConfig, targetInst, nativeEvent, nativeEventTarget) {
  this.dispatchConfig = dispatchConfig;
  this._targetInst = targetInst;
  this.nativeEvent = nativeEvent;

  var Interface = this.constructor.Interface;
  for (var propName in Interface) {
    if (!Interface.hasOwnProperty(propName)) {
      continue;
    }
    var normalize = Interface[propName];
    if (normalize) {
      this[propName] = normalize(nativeEvent);
    } else {
      if (propName === 'target') {
        this.target = nativeEventTarget;
      } else {
        this[propName] = nativeEvent[propName];
      }
    }
  }

  var defaultPrevented = nativeEvent.defaultPrevented != null ? nativeEvent.defaultPrevented : nativeEvent.returnValue === false;
  if (defaultPrevented) {
    this.isDefaultPrevented = emptyFunction_1.thatReturnsTrue;
  } else {
    this.isDefaultPrevented = emptyFunction_1.thatReturnsFalse;
  }
  this.isPropagationStopped = emptyFunction_1.thatReturnsFalse;
  return this;
}

assign(SyntheticEvent.prototype, {
  preventDefault: function () {
    this.defaultPrevented = true;
    var event = this.nativeEvent;
    if (!event) {
      return;
    }

    if (event.preventDefault) {
      event.preventDefault();
    } else if (typeof event.returnValue !== 'unknown') {
      event.returnValue = false;
    }
    this.isDefaultPrevented = emptyFunction_1.thatReturnsTrue;
  },

  stopPropagation: function () {
    var event = this.nativeEvent;
    if (!event) {
      return;
    }

    if (event.stopPropagation) {
      event.stopPropagation();
    } else if (typeof event.cancelBubble !== 'unknown') {
      // The ChangeEventPlugin registers a "propertychange" event for
      // IE. This event does not support bubbling or cancelling, and
      // any references to cancelBubble throw "Member not found".  A
      // typeof check of "unknown" circumvents this issue (and is also
      // IE specific).
      event.cancelBubble = true;
    }

    this.isPropagationStopped = emptyFunction_1.thatReturnsTrue;
  },

  /**
   * We release all dispatched `SyntheticEvent`s after each event loop, adding
   * them back into the pool. This allows a way to hold onto a reference that
   * won't be added back into the pool.
   */
  persist: function () {
    this.isPersistent = emptyFunction_1.thatReturnsTrue;
  },

  /**
   * Checks if this event should be released back into the pool.
   *
   * @return {boolean} True if this should not be released, false otherwise.
   */
  isPersistent: emptyFunction_1.thatReturnsFalse,

  /**
   * `PooledClass` looks for `destructor` on each instance it releases.
   */
  destructor: function () {
    var Interface = this.constructor.Interface;
    for (var propName in Interface) {
      {
        this[propName] = null;
      }
    }
    for (var i = 0; i < shouldBeReleasedProperties.length; i++) {
      this[shouldBeReleasedProperties[i]] = null;
    }
    
  }
});

SyntheticEvent.Interface = EventInterface;

/**
 * Helper to reduce boilerplate when creating subclasses.
 *
 * @param {function} Class
 * @param {?object} Interface
 */
SyntheticEvent.augmentClass = function (Class, Interface) {
  var Super = this;

  var E = function () {};
  E.prototype = Super.prototype;
  var prototype = new E();

  assign(prototype, Class.prototype);
  Class.prototype = prototype;
  Class.prototype.constructor = Class;

  Class.Interface = assign({}, Super.Interface, Interface);
  Class.augmentClass = Super.augmentClass;
  addEventPoolingTo(Class);
};

/** Proxying after everything set on SyntheticEvent
  * to resolve Proxy issue on some WebKit browsers
  * in which some Event properties are set to undefined (GH#10010)
  */
addEventPoolingTo(SyntheticEvent);

var SyntheticEvent_1 = SyntheticEvent;

function getPooledEvent(dispatchConfig, targetInst, nativeEvent, nativeInst) {
  var EventConstructor = this;
  if (EventConstructor.eventPool.length) {
    var instance = EventConstructor.eventPool.pop();
    EventConstructor.call(instance, dispatchConfig, targetInst, nativeEvent, nativeInst);
    return instance;
  }
  return new EventConstructor(dispatchConfig, targetInst, nativeEvent, nativeInst);
}

function releasePooledEvent(event) {
  var EventConstructor = this;
  !(event instanceof EventConstructor) ? reactProdInvariant_1('223') : void 0;
  event.destructor();
  if (EventConstructor.eventPool.length < EVENT_POOL_SIZE) {
    EventConstructor.eventPool.push(event);
  }
}

function addEventPoolingTo(EventConstructor) {
  EventConstructor.eventPool = [];
  EventConstructor.getPooled = getPooledEvent;
  EventConstructor.release = releasePooledEvent;
}

/**
 * @interface Event
 * @see http://www.w3.org/TR/DOM-Level-3-Events/#events-compositionevents
 */
var CompositionEventInterface = {
  data: null
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticCompositionEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticEvent_1.augmentClass(SyntheticCompositionEvent, CompositionEventInterface);

var SyntheticCompositionEvent_1 = SyntheticCompositionEvent;

/**
 * @interface Event
 * @see http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105
 *      /#events-inputevents
 */
var InputEventInterface = {
  data: null
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticInputEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticEvent_1.augmentClass(SyntheticInputEvent, InputEventInterface);

var SyntheticInputEvent_1 = SyntheticInputEvent;

var END_KEYCODES = [9, 13, 27, 32]; // Tab, Return, Esc, Space
var START_KEYCODE = 229;

var canUseCompositionEvent = ExecutionEnvironment_1.canUseDOM && 'CompositionEvent' in window;

var documentMode = null;
if (ExecutionEnvironment_1.canUseDOM && 'documentMode' in document) {
  documentMode = document.documentMode;
}

// Webkit offers a very useful `textInput` event that can be used to
// directly represent `beforeInput`. The IE `textinput` event is not as
// useful, so we don't use it.
var canUseTextInputEvent = ExecutionEnvironment_1.canUseDOM && 'TextEvent' in window && !documentMode && !isPresto();

// In IE9+, we have access to composition events, but the data supplied
// by the native compositionend event may be incorrect. Japanese ideographic
// spaces, for instance (\u3000) are not recorded correctly.
var useFallbackCompositionData = ExecutionEnvironment_1.canUseDOM && (!canUseCompositionEvent || documentMode && documentMode > 8 && documentMode <= 11);

/**
 * Opera <= 12 includes TextEvent in window, but does not fire
 * text input events. Rely on keypress instead.
 */
function isPresto() {
  var opera = window.opera;
  return typeof opera === 'object' && typeof opera.version === 'function' && parseInt(opera.version(), 10) <= 12;
}

var SPACEBAR_CODE = 32;
var SPACEBAR_CHAR = String.fromCharCode(SPACEBAR_CODE);

// Events and their corresponding property names.
var eventTypes = {
  beforeInput: {
    phasedRegistrationNames: {
      bubbled: 'onBeforeInput',
      captured: 'onBeforeInputCapture'
    },
    dependencies: ['topCompositionEnd', 'topKeyPress', 'topTextInput', 'topPaste']
  },
  compositionEnd: {
    phasedRegistrationNames: {
      bubbled: 'onCompositionEnd',
      captured: 'onCompositionEndCapture'
    },
    dependencies: ['topBlur', 'topCompositionEnd', 'topKeyDown', 'topKeyPress', 'topKeyUp', 'topMouseDown']
  },
  compositionStart: {
    phasedRegistrationNames: {
      bubbled: 'onCompositionStart',
      captured: 'onCompositionStartCapture'
    },
    dependencies: ['topBlur', 'topCompositionStart', 'topKeyDown', 'topKeyPress', 'topKeyUp', 'topMouseDown']
  },
  compositionUpdate: {
    phasedRegistrationNames: {
      bubbled: 'onCompositionUpdate',
      captured: 'onCompositionUpdateCapture'
    },
    dependencies: ['topBlur', 'topCompositionUpdate', 'topKeyDown', 'topKeyPress', 'topKeyUp', 'topMouseDown']
  }
};

// Track whether we've ever handled a keypress on the space key.
var hasSpaceKeypress = false;

/**
 * Return whether a native keypress event is assumed to be a command.
 * This is required because Firefox fires `keypress` events for key commands
 * (cut, copy, select-all, etc.) even though no character is inserted.
 */
function isKeypressCommand(nativeEvent) {
  return (nativeEvent.ctrlKey || nativeEvent.altKey || nativeEvent.metaKey) &&
  // ctrlKey && altKey is equivalent to AltGr, and is not a command.
  !(nativeEvent.ctrlKey && nativeEvent.altKey);
}

/**
 * Translate native top level events into event types.
 *
 * @param {string} topLevelType
 * @return {object}
 */
function getCompositionEventType(topLevelType) {
  switch (topLevelType) {
    case 'topCompositionStart':
      return eventTypes.compositionStart;
    case 'topCompositionEnd':
      return eventTypes.compositionEnd;
    case 'topCompositionUpdate':
      return eventTypes.compositionUpdate;
  }
}

/**
 * Does our fallback best-guess model think this event signifies that
 * composition has begun?
 *
 * @param {string} topLevelType
 * @param {object} nativeEvent
 * @return {boolean}
 */
function isFallbackCompositionStart(topLevelType, nativeEvent) {
  return topLevelType === 'topKeyDown' && nativeEvent.keyCode === START_KEYCODE;
}

/**
 * Does our fallback mode think that this event is the end of composition?
 *
 * @param {string} topLevelType
 * @param {object} nativeEvent
 * @return {boolean}
 */
function isFallbackCompositionEnd(topLevelType, nativeEvent) {
  switch (topLevelType) {
    case 'topKeyUp':
      // Command keys insert or clear IME input.
      return END_KEYCODES.indexOf(nativeEvent.keyCode) !== -1;
    case 'topKeyDown':
      // Expect IME keyCode on each keydown. If we get any other
      // code we must have exited earlier.
      return nativeEvent.keyCode !== START_KEYCODE;
    case 'topKeyPress':
    case 'topMouseDown':
    case 'topBlur':
      // Events are not possible without cancelling IME.
      return true;
    default:
      return false;
  }
}

/**
 * Google Input Tools provides composition data via a CustomEvent,
 * with the `data` property populated in the `detail` object. If this
 * is available on the event object, use it. If not, this is a plain
 * composition event and we have nothing special to extract.
 *
 * @param {object} nativeEvent
 * @return {?string}
 */
function getDataFromCustomEvent(nativeEvent) {
  var detail = nativeEvent.detail;
  if (typeof detail === 'object' && 'data' in detail) {
    return detail.data;
  }
  return null;
}

// Track the current IME composition status, if any.
var isComposing = false;

/**
 * @return {?object} A SyntheticCompositionEvent.
 */
function extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
  var eventType;
  var fallbackData;

  if (canUseCompositionEvent) {
    eventType = getCompositionEventType(topLevelType);
  } else if (!isComposing) {
    if (isFallbackCompositionStart(topLevelType, nativeEvent)) {
      eventType = eventTypes.compositionStart;
    }
  } else if (isFallbackCompositionEnd(topLevelType, nativeEvent)) {
    eventType = eventTypes.compositionEnd;
  }

  if (!eventType) {
    return null;
  }

  if (useFallbackCompositionData) {
    // The current composition is stored statically and must not be
    // overwritten while composition continues.
    if (!isComposing && eventType === eventTypes.compositionStart) {
      isComposing = FallbackCompositionState_1.initialize(nativeEventTarget);
    } else if (eventType === eventTypes.compositionEnd) {
      if (isComposing) {
        fallbackData = FallbackCompositionState_1.getData();
      }
    }
  }

  var event = SyntheticCompositionEvent_1.getPooled(eventType, targetInst, nativeEvent, nativeEventTarget);

  if (fallbackData) {
    // Inject data generated from fallback path into the synthetic event.
    // This matches the property of native CompositionEventInterface.
    event.data = fallbackData;
  } else {
    var customData = getDataFromCustomEvent(nativeEvent);
    if (customData !== null) {
      event.data = customData;
    }
  }

  EventPropagators_1.accumulateTwoPhaseDispatches(event);
  return event;
}

/**
 * @param {TopLevelTypes} topLevelType Record from `BrowserEventConstants`.
 * @param {object} nativeEvent Native browser event.
 * @return {?string} The string corresponding to this `beforeInput` event.
 */
function getNativeBeforeInputChars(topLevelType, nativeEvent) {
  switch (topLevelType) {
    case 'topCompositionEnd':
      return getDataFromCustomEvent(nativeEvent);
    case 'topKeyPress':
      /**
       * If native `textInput` events are available, our goal is to make
       * use of them. However, there is a special case: the spacebar key.
       * In Webkit, preventing default on a spacebar `textInput` event
       * cancels character insertion, but it *also* causes the browser
       * to fall back to its default spacebar behavior of scrolling the
       * page.
       *
       * Tracking at:
       * https://code.google.com/p/chromium/issues/detail?id=355103
       *
       * To avoid this issue, use the keypress event as if no `textInput`
       * event is available.
       */
      var which = nativeEvent.which;
      if (which !== SPACEBAR_CODE) {
        return null;
      }

      hasSpaceKeypress = true;
      return SPACEBAR_CHAR;

    case 'topTextInput':
      // Record the characters to be added to the DOM.
      var chars = nativeEvent.data;

      // If it's a spacebar character, assume that we have already handled
      // it at the keypress level and bail immediately. Android Chrome
      // doesn't give us keycodes, so we need to blacklist it.
      if (chars === SPACEBAR_CHAR && hasSpaceKeypress) {
        return null;
      }

      return chars;

    default:
      // For other native event types, do nothing.
      return null;
  }
}

/**
 * For browsers that do not provide the `textInput` event, extract the
 * appropriate string to use for SyntheticInputEvent.
 *
 * @param {string} topLevelType Record from `BrowserEventConstants`.
 * @param {object} nativeEvent Native browser event.
 * @return {?string} The fallback string for this `beforeInput` event.
 */
function getFallbackBeforeInputChars(topLevelType, nativeEvent) {
  // If we are currently composing (IME) and using a fallback to do so,
  // try to extract the composed characters from the fallback object.
  // If composition event is available, we extract a string only at
  // compositionevent, otherwise extract it at fallback events.
  if (isComposing) {
    if (topLevelType === 'topCompositionEnd' || !canUseCompositionEvent && isFallbackCompositionEnd(topLevelType, nativeEvent)) {
      var chars = FallbackCompositionState_1.getData();
      FallbackCompositionState_1.reset();
      isComposing = false;
      return chars;
    }
    return null;
  }

  switch (topLevelType) {
    case 'topPaste':
      // If a paste event occurs after a keypress, throw out the input
      // chars. Paste events should not lead to BeforeInput events.
      return null;
    case 'topKeyPress':
      /**
       * As of v27, Firefox may fire keypress events even when no character
       * will be inserted. A few possibilities:
       *
       * - `which` is `0`. Arrow keys, Esc key, etc.
       *
       * - `which` is the pressed key code, but no char is available.
       *   Ex: 'AltGr + d` in Polish. There is no modified character for
       *   this key combination and no character is inserted into the
       *   document, but FF fires the keypress for char code `100` anyway.
       *   No `input` event will occur.
       *
       * - `which` is the pressed key code, but a command combination is
       *   being used. Ex: `Cmd+C`. No character is inserted, and no
       *   `input` event will occur.
       */
      if (!isKeypressCommand(nativeEvent)) {
        // IE fires the `keypress` event when a user types an emoji via
        // Touch keyboard of Windows.  In such a case, the `char` property
        // holds an emoji character like `\uD83D\uDE0A`.  Because its length
        // is 2, the property `which` does not represent an emoji correctly.
        // In such a case, we directly return the `char` property instead of
        // using `which`.
        if (nativeEvent.char && nativeEvent.char.length > 1) {
          return nativeEvent.char;
        } else if (nativeEvent.which) {
          return String.fromCharCode(nativeEvent.which);
        }
      }
      return null;
    case 'topCompositionEnd':
      return useFallbackCompositionData ? null : nativeEvent.data;
    default:
      return null;
  }
}

/**
 * Extract a SyntheticInputEvent for `beforeInput`, based on either native
 * `textInput` or fallback behavior.
 *
 * @return {?object} A SyntheticInputEvent.
 */
function extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
  var chars;

  if (canUseTextInputEvent) {
    chars = getNativeBeforeInputChars(topLevelType, nativeEvent);
  } else {
    chars = getFallbackBeforeInputChars(topLevelType, nativeEvent);
  }

  // If no characters are being inserted, no BeforeInput event should
  // be fired.
  if (!chars) {
    return null;
  }

  var event = SyntheticInputEvent_1.getPooled(eventTypes.beforeInput, targetInst, nativeEvent, nativeEventTarget);

  event.data = chars;
  EventPropagators_1.accumulateTwoPhaseDispatches(event);
  return event;
}

/**
 * Create an `onBeforeInput` event to match
 * http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105/#events-inputevents.
 *
 * This event plugin is based on the native `textInput` event
 * available in Chrome, Safari, Opera, and IE. This event fires after
 * `onKeyPress` and `onCompositionEnd`, but before `onInput`.
 *
 * `beforeInput` is spec'd but not implemented in any browsers, and
 * the `input` event does not provide any useful information about what has
 * actually been added, contrary to the spec. Thus, `textInput` is the best
 * available event to identify the characters that have actually been inserted
 * into the target node.
 *
 * This plugin is also responsible for emitting `composition` events, thus
 * allowing us to share composition fallback code for both `beforeInput` and
 * `composition` event types.
 */
var BeforeInputEventPlugin = {
  eventTypes: eventTypes,

  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    return [extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget), extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget)];
  }
};

var BeforeInputEventPlugin_1 = BeforeInputEventPlugin;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule isTextInputElement
 * 
 */

/**
 * @see http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary
 */

var supportedInputTypes = {
  color: true,
  date: true,
  datetime: true,
  'datetime-local': true,
  email: true,
  month: true,
  number: true,
  password: true,
  range: true,
  search: true,
  tel: true,
  text: true,
  time: true,
  url: true,
  week: true
};

function isTextInputElement(elem) {
  var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();

  if (nodeName === 'input') {
    return !!supportedInputTypes[elem.type];
  }

  if (nodeName === 'textarea') {
    return true;
  }

  return false;
}

var isTextInputElement_1 = isTextInputElement;

var eventTypes$1 = {
  change: {
    phasedRegistrationNames: {
      bubbled: 'onChange',
      captured: 'onChangeCapture'
    },
    dependencies: ['topBlur', 'topChange', 'topClick', 'topFocus', 'topInput', 'topKeyDown', 'topKeyUp', 'topSelectionChange']
  }
};

function createAndAccumulateChangeEvent(inst, nativeEvent, target) {
  var event = SyntheticEvent_1.getPooled(eventTypes$1.change, inst, nativeEvent, target);
  event.type = 'change';
  // Flag this event loop as needing state restore.
  ReactControlledComponent_1.enqueueStateRestore(target);
  EventPropagators_1.accumulateTwoPhaseDispatches(event);
  return event;
}
/**
 * For IE shims
 */
var activeElement = null;
var activeElementInst = null;

/**
 * SECTION: handle `change` event
 */
function shouldUseChangeEvent(elem) {
  var nodeName = elem.nodeName && elem.nodeName.toLowerCase();
  return nodeName === 'select' || nodeName === 'input' && elem.type === 'file';
}

function manualDispatchChangeEvent(nativeEvent) {
  var event = createAndAccumulateChangeEvent(activeElementInst, nativeEvent, getEventTarget_1(nativeEvent));

  // If change and propertychange bubbled, we'd just bind to it like all the
  // other events and have it go through ReactBrowserEventEmitter. Since it
  // doesn't, we manually listen for the events and so we have to enqueue and
  // process the abstract event manually.
  //
  // Batching is necessary here in order to ensure that all event handlers run
  // before the next rerender (including event handlers attached to ancestor
  // elements instead of directly on the input). Without this, controlled
  // components don't work properly in conjunction with event bubbling because
  // the component is rerendered and the value reverted before all the event
  // handlers can run. See https://github.com/facebook/react/issues/708.
  ReactGenericBatching_1.batchedUpdates(runEventInBatch, event);
}

function runEventInBatch(event) {
  EventPluginHub_1.enqueueEvents(event);
  EventPluginHub_1.processEventQueue(false);
}

function getInstIfValueChanged(targetInst) {
  var targetNode = ReactDOMComponentTree_1.getNodeFromInstance(targetInst);
  if (inputValueTracking_1.updateValueIfChanged(targetNode)) {
    return targetInst;
  }
}

function getTargetInstForChangeEvent(topLevelType, targetInst) {
  if (topLevelType === 'topChange') {
    return targetInst;
  }
}

/**
 * SECTION: handle `input` event
 */
var isInputEventSupported = false;
if (ExecutionEnvironment_1.canUseDOM) {
  // IE9 claims to support the input event but fails to trigger it when
  // deleting text, so we ignore its input events.
  isInputEventSupported = isEventSupported_1('input') && (!document.documentMode || document.documentMode > 9);
}

/**
 * (For IE <=9) Starts tracking propertychange events on the passed-in element
 * and override the value property so that we can distinguish user events from
 * value changes in JS.
 */
function startWatchingForValueChange(target, targetInst) {
  activeElement = target;
  activeElementInst = targetInst;
  activeElement.attachEvent('onpropertychange', handlePropertyChange);
}

/**
 * (For IE <=9) Removes the event listeners from the currently-tracked element,
 * if any exists.
 */
function stopWatchingForValueChange() {
  if (!activeElement) {
    return;
  }
  activeElement.detachEvent('onpropertychange', handlePropertyChange);
  activeElement = null;
  activeElementInst = null;
}

/**
 * (For IE <=9) Handles a propertychange event, sending a `change` event if
 * the value of the active element has changed.
 */
function handlePropertyChange(nativeEvent) {
  if (nativeEvent.propertyName !== 'value') {
    return;
  }
  if (getInstIfValueChanged(activeElementInst)) {
    manualDispatchChangeEvent(nativeEvent);
  }
}

function handleEventsForInputEventPolyfill(topLevelType, target, targetInst) {
  if (topLevelType === 'topFocus') {
    // In IE9, propertychange fires for most input events but is buggy and
    // doesn't fire when text is deleted, but conveniently, selectionchange
    // appears to fire in all of the remaining cases so we catch those and
    // forward the event if the value has changed
    // In either case, we don't want to call the event handler if the value
    // is changed from JS so we redefine a setter for `.value` that updates
    // our activeElementValue variable, allowing us to ignore those changes
    //
    // stopWatching() should be a noop here but we call it just in case we
    // missed a blur event somehow.
    stopWatchingForValueChange();
    startWatchingForValueChange(target, targetInst);
  } else if (topLevelType === 'topBlur') {
    stopWatchingForValueChange();
  }
}

// For IE8 and IE9.
function getTargetInstForInputEventPolyfill(topLevelType, targetInst) {
  if (topLevelType === 'topSelectionChange' || topLevelType === 'topKeyUp' || topLevelType === 'topKeyDown') {
    // On the selectionchange event, the target is just document which isn't
    // helpful for us so just check activeElement instead.
    //
    // 99% of the time, keydown and keyup aren't necessary. IE8 fails to fire
    // propertychange on the first input event after setting `value` from a
    // script and fires only keydown, keypress, keyup. Catching keyup usually
    // gets it and catching keydown lets us fire an event for the first
    // keystroke if user does a key repeat (it'll be a little delayed: right
    // before the second keystroke). Other input methods (e.g., paste) seem to
    // fire selectionchange normally.
    return getInstIfValueChanged(activeElementInst);
  }
}

/**
 * SECTION: handle `click` event
 */
function shouldUseClickEvent(elem) {
  // Use the `click` event to detect changes to checkbox and radio inputs.
  // This approach works across all browsers, whereas `change` does not fire
  // until `blur` in IE8.
  var nodeName = elem.nodeName;
  return nodeName && nodeName.toLowerCase() === 'input' && (elem.type === 'checkbox' || elem.type === 'radio');
}

function getTargetInstForClickEvent(topLevelType, targetInst) {
  if (topLevelType === 'topClick') {
    return getInstIfValueChanged(targetInst);
  }
}

function getTargetInstForInputOrChangeEvent(topLevelType, targetInst) {
  if (topLevelType === 'topInput' || topLevelType === 'topChange') {
    return getInstIfValueChanged(targetInst);
  }
}

function handleControlledInputBlur(inst, node) {
  // TODO: In IE, inst is occasionally null. Why?
  if (inst == null) {
    return;
  }

  // Fiber and ReactDOM keep wrapper state in separate places
  var state = inst._wrapperState || node._wrapperState;

  if (!state || !state.controlled || node.type !== 'number') {
    return;
  }

  // If controlled, assign the value attribute to the current value on blur
  var value = '' + node.value;
  if (node.getAttribute('value') !== value) {
    node.setAttribute('value', value);
  }
}

/**
 * This plugin creates an `onChange` event that normalizes change events
 * across form elements. This event fires at a time when it's possible to
 * change the element's value without seeing a flicker.
 *
 * Supported elements are:
 * - input (see `isTextInputElement`)
 * - textarea
 * - select
 */
var ChangeEventPlugin = {
  eventTypes: eventTypes$1,

  _isInputEventSupported: isInputEventSupported,

  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var targetNode = targetInst ? ReactDOMComponentTree_1.getNodeFromInstance(targetInst) : window;

    var getTargetInstFunc, handleEventFunc;
    if (shouldUseChangeEvent(targetNode)) {
      getTargetInstFunc = getTargetInstForChangeEvent;
    } else if (isTextInputElement_1(targetNode)) {
      if (isInputEventSupported) {
        getTargetInstFunc = getTargetInstForInputOrChangeEvent;
      } else {
        getTargetInstFunc = getTargetInstForInputEventPolyfill;
        handleEventFunc = handleEventsForInputEventPolyfill;
      }
    } else if (shouldUseClickEvent(targetNode)) {
      getTargetInstFunc = getTargetInstForClickEvent;
    }

    if (getTargetInstFunc) {
      var inst = getTargetInstFunc(topLevelType, targetInst);
      if (inst) {
        var event = createAndAccumulateChangeEvent(inst, nativeEvent, nativeEventTarget);
        return event;
      }
    }

    if (handleEventFunc) {
      handleEventFunc(topLevelType, targetNode, targetInst);
    }

    // When blurring, set the value attribute for number inputs
    if (topLevelType === 'topBlur') {
      handleControlledInputBlur(targetInst, targetNode);
    }
  }
};

var ChangeEventPlugin_1 = ChangeEventPlugin;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule DOMEventPluginOrder
 */

/**
 * Module that is injectable into `EventPluginHub`, that specifies a
 * deterministic ordering of `EventPlugin`s. A convenient way to reason about
 * plugins, without having to package every one of them. This is better than
 * having plugins be ordered in the same order that they are injected because
 * that ordering would be influenced by the packaging order.
 * `ResponderEventPlugin` must occur before `SimpleEventPlugin` so that
 * preventing default on events is convenient in `SimpleEventPlugin` handlers.
 */

var DOMEventPluginOrder = ['ResponderEventPlugin', 'SimpleEventPlugin', 'TapEventPlugin', 'EnterLeaveEventPlugin', 'ChangeEventPlugin', 'SelectEventPlugin', 'BeforeInputEventPlugin'];

var DOMEventPluginOrder_1 = DOMEventPluginOrder;

/**
 * @interface UIEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */
var UIEventInterface = {
  view: function (event) {
    if (event.view) {
      return event.view;
    }

    var target = getEventTarget_1(event);
    if (target.window === target) {
      // target is a window object
      return target;
    }

    var doc = target.ownerDocument;
    // TODO: Figure out why `ownerDocument` is sometimes undefined in IE8.
    if (doc) {
      return doc.defaultView || doc.parentWindow;
    } else {
      return window;
    }
  },
  detail: function (event) {
    return event.detail || 0;
  }
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticEvent}
 */
function SyntheticUIEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticEvent_1.augmentClass(SyntheticUIEvent, UIEventInterface);

var SyntheticUIEvent_1 = SyntheticUIEvent;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule getEventModifierState
 */

/**
 * Translation from modifier key to the associated property in the event.
 * @see http://www.w3.org/TR/DOM-Level-3-Events/#keys-Modifiers
 */

var modifierKeyToProp = {
  Alt: 'altKey',
  Control: 'ctrlKey',
  Meta: 'metaKey',
  Shift: 'shiftKey'
};

// IE8 does not implement getModifierState so we simply map it to the only
// modifier keys exposed by the event itself, does not support Lock-keys.
// Currently, all major browsers except Chrome seems to support Lock-keys.
function modifierStateGetter(keyArg) {
  var syntheticEvent = this;
  var nativeEvent = syntheticEvent.nativeEvent;
  if (nativeEvent.getModifierState) {
    return nativeEvent.getModifierState(keyArg);
  }
  var keyProp = modifierKeyToProp[keyArg];
  return keyProp ? !!nativeEvent[keyProp] : false;
}

function getEventModifierState(nativeEvent) {
  return modifierStateGetter;
}

var getEventModifierState_1 = getEventModifierState;

/**
 * @interface MouseEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */
var MouseEventInterface = {
  screenX: null,
  screenY: null,
  clientX: null,
  clientY: null,
  pageX: null,
  pageY: null,
  ctrlKey: null,
  shiftKey: null,
  altKey: null,
  metaKey: null,
  getModifierState: getEventModifierState_1,
  button: null,
  buttons: null,
  relatedTarget: function (event) {
    return event.relatedTarget || (event.fromElement === event.srcElement ? event.toElement : event.fromElement);
  }
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticMouseEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticUIEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticUIEvent_1.augmentClass(SyntheticMouseEvent, MouseEventInterface);

var SyntheticMouseEvent_1 = SyntheticMouseEvent;

var eventTypes$2 = {
  mouseEnter: {
    registrationName: 'onMouseEnter',
    dependencies: ['topMouseOut', 'topMouseOver']
  },
  mouseLeave: {
    registrationName: 'onMouseLeave',
    dependencies: ['topMouseOut', 'topMouseOver']
  }
};

var EnterLeaveEventPlugin = {
  eventTypes: eventTypes$2,

  /**
   * For almost every interaction we care about, there will be both a top-level
   * `mouseover` and `mouseout` event that occurs. Only use `mouseout` so that
   * we do not extract duplicate events. However, moving the mouse into the
   * browser from outside will not fire a `mouseout` event. In this case, we use
   * the `mouseover` top-level event.
   */
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    if (topLevelType === 'topMouseOver' && (nativeEvent.relatedTarget || nativeEvent.fromElement)) {
      return null;
    }
    if (topLevelType !== 'topMouseOut' && topLevelType !== 'topMouseOver') {
      // Must not be a mouse in or mouse out - ignoring.
      return null;
    }

    var win;
    if (nativeEventTarget.window === nativeEventTarget) {
      // `nativeEventTarget` is probably a window object.
      win = nativeEventTarget;
    } else {
      // TODO: Figure out why `ownerDocument` is sometimes undefined in IE8.
      var doc = nativeEventTarget.ownerDocument;
      if (doc) {
        win = doc.defaultView || doc.parentWindow;
      } else {
        win = window;
      }
    }

    var from;
    var to;
    if (topLevelType === 'topMouseOut') {
      from = targetInst;
      var related = nativeEvent.relatedTarget || nativeEvent.toElement;
      to = related ? ReactDOMComponentTree_1.getClosestInstanceFromNode(related) : null;
    } else {
      // Moving to a node from outside the window.
      from = null;
      to = targetInst;
    }

    if (from === to) {
      // Nothing pertains to our managed components.
      return null;
    }

    var fromNode = from == null ? win : ReactDOMComponentTree_1.getNodeFromInstance(from);
    var toNode = to == null ? win : ReactDOMComponentTree_1.getNodeFromInstance(to);

    var leave = SyntheticMouseEvent_1.getPooled(eventTypes$2.mouseLeave, from, nativeEvent, nativeEventTarget);
    leave.type = 'mouseleave';
    leave.target = fromNode;
    leave.relatedTarget = toNode;

    var enter = SyntheticMouseEvent_1.getPooled(eventTypes$2.mouseEnter, to, nativeEvent, nativeEventTarget);
    enter.type = 'mouseenter';
    enter.target = toNode;
    enter.relatedTarget = fromNode;

    EventPropagators_1.accumulateEnterLeaveDispatches(leave, enter, from, to);

    return [leave, enter];
  }
};

var EnterLeaveEventPlugin_1 = EnterLeaveEventPlugin;

var DOCUMENT_NODE$2 = HTMLNodeType_1.DOCUMENT_NODE;





var skipSelectionChangeEvent = ExecutionEnvironment_1.canUseDOM && 'documentMode' in document && document.documentMode <= 11;

var eventTypes$3 = {
  select: {
    phasedRegistrationNames: {
      bubbled: 'onSelect',
      captured: 'onSelectCapture'
    },
    dependencies: ['topBlur', 'topContextMenu', 'topFocus', 'topKeyDown', 'topKeyUp', 'topMouseDown', 'topMouseUp', 'topSelectionChange']
  }
};

var activeElement$1 = null;
var activeElementInst$1 = null;
var lastSelection = null;
var mouseDown = false;

// Track whether all listeners exists for this plugin. If none exist, we do
// not extract events. See #3639.
var isListeningToAllDependencies = ReactBrowserEventEmitter_1.isListeningToAllDependencies;

/**
 * Get an object which is a unique representation of the current selection.
 *
 * The return value will not be consistent across nodes or browsers, but
 * two identical selections on the same node will return identical objects.
 *
 * @param {DOMElement} node
 * @return {object}
 */
function getSelection(node) {
  if ('selectionStart' in node && ReactInputSelection_1.hasSelectionCapabilities(node)) {
    return {
      start: node.selectionStart,
      end: node.selectionEnd
    };
  } else if (window.getSelection) {
    var selection = window.getSelection();
    return {
      anchorNode: selection.anchorNode,
      anchorOffset: selection.anchorOffset,
      focusNode: selection.focusNode,
      focusOffset: selection.focusOffset
    };
  }
}

/**
 * Poll selection to see whether it's changed.
 *
 * @param {object} nativeEvent
 * @return {?SyntheticEvent}
 */
function constructSelectEvent(nativeEvent, nativeEventTarget) {
  // Ensure we have the right element, and that the user is not dragging a
  // selection (this matches native `select` event behavior). In HTML5, select
  // fires only on input and textarea thus if there's no focused element we
  // won't dispatch.
  if (mouseDown || activeElement$1 == null || activeElement$1 !== getActiveElement_1()) {
    return null;
  }

  // Only fire when selection has actually changed.
  var currentSelection = getSelection(activeElement$1);
  if (!lastSelection || !shallowEqual_1(lastSelection, currentSelection)) {
    lastSelection = currentSelection;

    var syntheticEvent = SyntheticEvent_1.getPooled(eventTypes$3.select, activeElementInst$1, nativeEvent, nativeEventTarget);

    syntheticEvent.type = 'select';
    syntheticEvent.target = activeElement$1;

    EventPropagators_1.accumulateTwoPhaseDispatches(syntheticEvent);

    return syntheticEvent;
  }

  return null;
}

/**
 * This plugin creates an `onSelect` event that normalizes select events
 * across form elements.
 *
 * Supported elements are:
 * - input (see `isTextInputElement`)
 * - textarea
 * - contentEditable
 *
 * This differs from native browser implementations in the following ways:
 * - Fires on contentEditable fields as well as inputs.
 * - Fires for collapsed selection.
 * - Fires after user input.
 */
var SelectEventPlugin = {
  eventTypes: eventTypes$3,

  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var doc = nativeEventTarget.window === nativeEventTarget ? nativeEventTarget.document : nativeEventTarget.nodeType === DOCUMENT_NODE$2 ? nativeEventTarget : nativeEventTarget.ownerDocument;
    if (!doc || !isListeningToAllDependencies('onSelect', doc)) {
      return null;
    }

    var targetNode = targetInst ? ReactDOMComponentTree_1.getNodeFromInstance(targetInst) : window;

    switch (topLevelType) {
      // Track the input node that has focus.
      case 'topFocus':
        if (isTextInputElement_1(targetNode) || targetNode.contentEditable === 'true') {
          activeElement$1 = targetNode;
          activeElementInst$1 = targetInst;
          lastSelection = null;
        }
        break;
      case 'topBlur':
        activeElement$1 = null;
        activeElementInst$1 = null;
        lastSelection = null;
        break;
      // Don't fire the event while the user is dragging. This matches the
      // semantics of the native select event.
      case 'topMouseDown':
        mouseDown = true;
        break;
      case 'topContextMenu':
      case 'topMouseUp':
        mouseDown = false;
        return constructSelectEvent(nativeEvent, nativeEventTarget);
      // Chrome and IE fire non-standard event when selection is changed (and
      // sometimes when it hasn't). IE's event fires out of order with respect
      // to key and input events on deletion, so we discard it.
      //
      // Firefox doesn't support selectionchange, so check selection status
      // after each key entry. The selection changes after keydown and before
      // keyup, but we check on keydown as well in the case of holding down a
      // key, when multiple keydown events are fired but only one keyup is.
      // This is also our approach for IE handling, for the reason above.
      case 'topSelectionChange':
        if (skipSelectionChangeEvent) {
          break;
        }
      // falls through
      case 'topKeyDown':
      case 'topKeyUp':
        return constructSelectEvent(nativeEvent, nativeEventTarget);
    }

    return null;
  }
};

var SelectEventPlugin_1 = SelectEventPlugin;

/**
 * @interface Event
 * @see http://www.w3.org/TR/css3-animations/#AnimationEvent-interface
 * @see https://developer.mozilla.org/en-US/docs/Web/API/AnimationEvent
 */
var AnimationEventInterface = {
  animationName: null,
  elapsedTime: null,
  pseudoElement: null
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticEvent}
 */
function SyntheticAnimationEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticEvent_1.augmentClass(SyntheticAnimationEvent, AnimationEventInterface);

var SyntheticAnimationEvent_1 = SyntheticAnimationEvent;

/**
 * @interface Event
 * @see http://www.w3.org/TR/clipboard-apis/
 */
var ClipboardEventInterface = {
  clipboardData: function (event) {
    return 'clipboardData' in event ? event.clipboardData : window.clipboardData;
  }
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticClipboardEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticEvent_1.augmentClass(SyntheticClipboardEvent, ClipboardEventInterface);

var SyntheticClipboardEvent_1 = SyntheticClipboardEvent;

/**
 * @interface FocusEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */
var FocusEventInterface = {
  relatedTarget: null
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticFocusEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticUIEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticUIEvent_1.augmentClass(SyntheticFocusEvent, FocusEventInterface);

var SyntheticFocusEvent_1 = SyntheticFocusEvent;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule getEventCharCode
 */

/**
 * `charCode` represents the actual "character code" and is safe to use with
 * `String.fromCharCode`. As such, only keys that correspond to printable
 * characters produce a valid `charCode`, the only exception to this is Enter.
 * The Tab-key is considered non-printable and does not have a `charCode`,
 * presumably because it does not produce a tab-character in browsers.
 *
 * @param {object} nativeEvent Native browser event.
 * @return {number} Normalized `charCode` property.
 */

function getEventCharCode(nativeEvent) {
  var charCode;
  var keyCode = nativeEvent.keyCode;

  if ('charCode' in nativeEvent) {
    charCode = nativeEvent.charCode;

    // FF does not set `charCode` for the Enter-key, check against `keyCode`.
    if (charCode === 0 && keyCode === 13) {
      charCode = 13;
    }
  } else {
    // IE8 does not implement `charCode`, but `keyCode` has the correct value.
    charCode = keyCode;
  }

  // Some non-printable keys are reported in `charCode`/`keyCode`, discard them.
  // Must not discard the (non-)printable Enter-key.
  if (charCode >= 32 || charCode === 13) {
    return charCode;
  }

  return 0;
}

var getEventCharCode_1 = getEventCharCode;

/**
 * Normalization of deprecated HTML5 `key` values
 * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names
 */
var normalizeKey = {
  Esc: 'Escape',
  Spacebar: ' ',
  Left: 'ArrowLeft',
  Up: 'ArrowUp',
  Right: 'ArrowRight',
  Down: 'ArrowDown',
  Del: 'Delete',
  Win: 'OS',
  Menu: 'ContextMenu',
  Apps: 'ContextMenu',
  Scroll: 'ScrollLock',
  MozPrintableKey: 'Unidentified'
};

/**
 * Translation from legacy `keyCode` to HTML5 `key`
 * Only special keys supported, all others depend on keyboard layout or browser
 * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names
 */
var translateToKey = {
  8: 'Backspace',
  9: 'Tab',
  12: 'Clear',
  13: 'Enter',
  16: 'Shift',
  17: 'Control',
  18: 'Alt',
  19: 'Pause',
  20: 'CapsLock',
  27: 'Escape',
  32: ' ',
  33: 'PageUp',
  34: 'PageDown',
  35: 'End',
  36: 'Home',
  37: 'ArrowLeft',
  38: 'ArrowUp',
  39: 'ArrowRight',
  40: 'ArrowDown',
  45: 'Insert',
  46: 'Delete',
  112: 'F1',
  113: 'F2',
  114: 'F3',
  115: 'F4',
  116: 'F5',
  117: 'F6',
  118: 'F7',
  119: 'F8',
  120: 'F9',
  121: 'F10',
  122: 'F11',
  123: 'F12',
  144: 'NumLock',
  145: 'ScrollLock',
  224: 'Meta'
};

/**
 * @param {object} nativeEvent Native browser event.
 * @return {string} Normalized `key` property.
 */
function getEventKey(nativeEvent) {
  if (nativeEvent.key) {
    // Normalize inconsistent values reported by browsers due to
    // implementations of a working draft specification.

    // FireFox implements `key` but returns `MozPrintableKey` for all
    // printable characters (normalized to `Unidentified`), ignore it.
    var key = normalizeKey[nativeEvent.key] || nativeEvent.key;
    if (key !== 'Unidentified') {
      return key;
    }
  }

  // Browser does not implement `key`, polyfill as much of it as we can.
  if (nativeEvent.type === 'keypress') {
    var charCode = getEventCharCode_1(nativeEvent);

    // The enter-key is technically both printable and non-printable and can
    // thus be captured by `keypress`, no other non-printable key should.
    return charCode === 13 ? 'Enter' : String.fromCharCode(charCode);
  }
  if (nativeEvent.type === 'keydown' || nativeEvent.type === 'keyup') {
    // While user keyboard layout determines the actual meaning of each
    // `keyCode` value, almost all function keys have a universal value.
    return translateToKey[nativeEvent.keyCode] || 'Unidentified';
  }
  return '';
}

var getEventKey_1 = getEventKey;

/**
 * @interface KeyboardEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */
var KeyboardEventInterface = {
  key: getEventKey_1,
  location: null,
  ctrlKey: null,
  shiftKey: null,
  altKey: null,
  metaKey: null,
  repeat: null,
  locale: null,
  getModifierState: getEventModifierState_1,
  // Legacy Interface
  charCode: function (event) {
    // `charCode` is the result of a KeyPress event and represents the value of
    // the actual printable character.

    // KeyPress is deprecated, but its replacement is not yet final and not
    // implemented in any major browser. Only KeyPress has charCode.
    if (event.type === 'keypress') {
      return getEventCharCode_1(event);
    }
    return 0;
  },
  keyCode: function (event) {
    // `keyCode` is the result of a KeyDown/Up event and represents the value of
    // physical keyboard key.

    // The actual meaning of the value depends on the users' keyboard layout
    // which cannot be detected. Assuming that it is a US keyboard layout
    // provides a surprisingly accurate mapping for US and European users.
    // Due to this, it is left to the user to implement at this time.
    if (event.type === 'keydown' || event.type === 'keyup') {
      return event.keyCode;
    }
    return 0;
  },
  which: function (event) {
    // `which` is an alias for either `keyCode` or `charCode` depending on the
    // type of the event.
    if (event.type === 'keypress') {
      return getEventCharCode_1(event);
    }
    if (event.type === 'keydown' || event.type === 'keyup') {
      return event.keyCode;
    }
    return 0;
  }
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticKeyboardEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticUIEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticUIEvent_1.augmentClass(SyntheticKeyboardEvent, KeyboardEventInterface);

var SyntheticKeyboardEvent_1 = SyntheticKeyboardEvent;

/**
 * @interface DragEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */
var DragEventInterface = {
  dataTransfer: null
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticDragEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticMouseEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticMouseEvent_1.augmentClass(SyntheticDragEvent, DragEventInterface);

var SyntheticDragEvent_1 = SyntheticDragEvent;

/**
 * @interface TouchEvent
 * @see http://www.w3.org/TR/touch-events/
 */
var TouchEventInterface = {
  touches: null,
  targetTouches: null,
  changedTouches: null,
  altKey: null,
  metaKey: null,
  ctrlKey: null,
  shiftKey: null,
  getModifierState: getEventModifierState_1
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticUIEvent}
 */
function SyntheticTouchEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticUIEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticUIEvent_1.augmentClass(SyntheticTouchEvent, TouchEventInterface);

var SyntheticTouchEvent_1 = SyntheticTouchEvent;

/**
 * @interface Event
 * @see http://www.w3.org/TR/2009/WD-css3-transitions-20090320/#transition-events-
 * @see https://developer.mozilla.org/en-US/docs/Web/API/TransitionEvent
 */
var TransitionEventInterface = {
  propertyName: null,
  elapsedTime: null,
  pseudoElement: null
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticEvent}
 */
function SyntheticTransitionEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticEvent_1.augmentClass(SyntheticTransitionEvent, TransitionEventInterface);

var SyntheticTransitionEvent_1 = SyntheticTransitionEvent;

/**
 * @interface WheelEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */
var WheelEventInterface = {
  deltaX: function (event) {
    return 'deltaX' in event ? event.deltaX : // Fallback to `wheelDeltaX` for Webkit and normalize (right is positive).
    'wheelDeltaX' in event ? -event.wheelDeltaX : 0;
  },
  deltaY: function (event) {
    return 'deltaY' in event ? event.deltaY : // Fallback to `wheelDeltaY` for Webkit and normalize (down is positive).
    'wheelDeltaY' in event ? -event.wheelDeltaY : // Fallback to `wheelDelta` for IE<9 and normalize (down is positive).
    'wheelDelta' in event ? -event.wheelDelta : 0;
  },
  deltaZ: null,

  // Browsers without "deltaMode" is reporting in raw wheel delta where one
  // notch on the scroll is always +/- 120, roughly equivalent to pixels.
  // A good approximation of DOM_DELTA_LINE (1) is 5% of viewport size or
  // ~40 pixels, for DOM_DELTA_SCREEN (2) it is 87.5% of viewport size.
  deltaMode: null
};

/**
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {string} dispatchMarker Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @extends {SyntheticMouseEvent}
 */
function SyntheticWheelEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
  return SyntheticMouseEvent_1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}

SyntheticMouseEvent_1.augmentClass(SyntheticWheelEvent, WheelEventInterface);

var SyntheticWheelEvent_1 = SyntheticWheelEvent;

/**
 * Turns
 * ['abort', ...]
 * into
 * eventTypes = {
 *   'abort': {
 *     phasedRegistrationNames: {
 *       bubbled: 'onAbort',
 *       captured: 'onAbortCapture',
 *     },
 *     dependencies: ['topAbort'],
 *   },
 *   ...
 * };
 * topLevelEventsToDispatchConfig = {
 *   'topAbort': { sameConfig }
 * };
 */
var eventTypes$4 = {};
var topLevelEventsToDispatchConfig = {};
['abort', 'animationEnd', 'animationIteration', 'animationStart', 'blur', 'cancel', 'canPlay', 'canPlayThrough', 'click', 'close', 'contextMenu', 'copy', 'cut', 'doubleClick', 'drag', 'dragEnd', 'dragEnter', 'dragExit', 'dragLeave', 'dragOver', 'dragStart', 'drop', 'durationChange', 'emptied', 'encrypted', 'ended', 'error', 'focus', 'input', 'invalid', 'keyDown', 'keyPress', 'keyUp', 'load', 'loadedData', 'loadedMetadata', 'loadStart', 'mouseDown', 'mouseMove', 'mouseOut', 'mouseOver', 'mouseUp', 'paste', 'pause', 'play', 'playing', 'progress', 'rateChange', 'reset', 'scroll', 'seeked', 'seeking', 'stalled', 'submit', 'suspend', 'timeUpdate', 'toggle', 'touchCancel', 'touchEnd', 'touchMove', 'touchStart', 'transitionEnd', 'volumeChange', 'waiting', 'wheel'].forEach(function (event) {
  var capitalizedEvent = event[0].toUpperCase() + event.slice(1);
  var onEvent = 'on' + capitalizedEvent;
  var topEvent = 'top' + capitalizedEvent;

  var type = {
    phasedRegistrationNames: {
      bubbled: onEvent,
      captured: onEvent + 'Capture'
    },
    dependencies: [topEvent]
  };
  eventTypes$4[event] = type;
  topLevelEventsToDispatchConfig[topEvent] = type;
});

var SimpleEventPlugin = {
  eventTypes: eventTypes$4,

  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var dispatchConfig = topLevelEventsToDispatchConfig[topLevelType];
    if (!dispatchConfig) {
      return null;
    }
    var EventConstructor;
    switch (topLevelType) {
      case 'topKeyPress':
        // Firefox creates a keypress event for function keys too. This removes
        // the unwanted keypress events. Enter is however both printable and
        // non-printable. One would expect Tab to be as well (but it isn't).
        if (getEventCharCode_1(nativeEvent) === 0) {
          return null;
        }
      /* falls through */
      case 'topKeyDown':
      case 'topKeyUp':
        EventConstructor = SyntheticKeyboardEvent_1;
        break;
      case 'topBlur':
      case 'topFocus':
        EventConstructor = SyntheticFocusEvent_1;
        break;
      case 'topClick':
        // Firefox creates a click event on right mouse clicks. This removes the
        // unwanted click events.
        if (nativeEvent.button === 2) {
          return null;
        }
      /* falls through */
      case 'topDoubleClick':
      case 'topMouseDown':
      case 'topMouseMove':
      case 'topMouseUp':
      // TODO: Disabled elements should not respond to mouse events
      /* falls through */
      case 'topMouseOut':
      case 'topMouseOver':
      case 'topContextMenu':
        EventConstructor = SyntheticMouseEvent_1;
        break;
      case 'topDrag':
      case 'topDragEnd':
      case 'topDragEnter':
      case 'topDragExit':
      case 'topDragLeave':
      case 'topDragOver':
      case 'topDragStart':
      case 'topDrop':
        EventConstructor = SyntheticDragEvent_1;
        break;
      case 'topTouchCancel':
      case 'topTouchEnd':
      case 'topTouchMove':
      case 'topTouchStart':
        EventConstructor = SyntheticTouchEvent_1;
        break;
      case 'topAnimationEnd':
      case 'topAnimationIteration':
      case 'topAnimationStart':
        EventConstructor = SyntheticAnimationEvent_1;
        break;
      case 'topTransitionEnd':
        EventConstructor = SyntheticTransitionEvent_1;
        break;
      case 'topScroll':
        EventConstructor = SyntheticUIEvent_1;
        break;
      case 'topWheel':
        EventConstructor = SyntheticWheelEvent_1;
        break;
      case 'topCopy':
      case 'topCut':
      case 'topPaste':
        EventConstructor = SyntheticClipboardEvent_1;
        break;
      default:
        
        // HTML Events
        // @see http://www.w3.org/TR/html5/index.html#events-0
        EventConstructor = SyntheticEvent_1;
        break;
    }
    var event = EventConstructor.getPooled(dispatchConfig, targetInst, nativeEvent, nativeEventTarget);
    EventPropagators_1.accumulateTwoPhaseDispatches(event);
    return event;
  }
};

var SimpleEventPlugin_1 = SimpleEventPlugin;

ReactDOMEventListener_1.setHandleTopLevel(ReactBrowserEventEmitter_1.handleTopLevel);

/**
 * Inject modules for resolving DOM hierarchy and plugin ordering.
 */
EventPluginHub_1.injection.injectEventPluginOrder(DOMEventPluginOrder_1);
EventPluginUtils_1.injection.injectComponentTree(ReactDOMComponentTree_1);

/**
 * Some important event plugins included by default (without having to require
 * them).
 */
EventPluginHub_1.injection.injectEventPluginsByName({
  SimpleEventPlugin: SimpleEventPlugin_1,
  EnterLeaveEventPlugin: EnterLeaveEventPlugin_1,
  ChangeEventPlugin: ChangeEventPlugin_1,
  SelectEventPlugin: SelectEventPlugin_1,
  BeforeInputEventPlugin: BeforeInputEventPlugin_1
});

var MUST_USE_PROPERTY = DOMProperty_1.injection.MUST_USE_PROPERTY;
var HAS_BOOLEAN_VALUE = DOMProperty_1.injection.HAS_BOOLEAN_VALUE;
var HAS_NUMERIC_VALUE = DOMProperty_1.injection.HAS_NUMERIC_VALUE;
var HAS_POSITIVE_NUMERIC_VALUE = DOMProperty_1.injection.HAS_POSITIVE_NUMERIC_VALUE;
var HAS_OVERLOADED_BOOLEAN_VALUE = DOMProperty_1.injection.HAS_OVERLOADED_BOOLEAN_VALUE;
var HAS_STRING_BOOLEAN_VALUE = DOMProperty_1.injection.HAS_STRING_BOOLEAN_VALUE;

var HTMLDOMPropertyConfig = {
  // When adding attributes to this list, be sure to also add them to
  // the `possibleStandardNames` module to ensure casing and incorrect
  // name warnings.
  Properties: {
    allowFullScreen: HAS_BOOLEAN_VALUE,
    // specifies target context for links with `preload` type
    async: HAS_BOOLEAN_VALUE,
    // autoFocus is polyfilled/normalized by AutoFocusUtils
    // autoFocus: HAS_BOOLEAN_VALUE,
    autoPlay: HAS_BOOLEAN_VALUE,
    capture: HAS_BOOLEAN_VALUE,
    checked: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
    cols: HAS_POSITIVE_NUMERIC_VALUE,
    contentEditable: HAS_STRING_BOOLEAN_VALUE,
    controls: HAS_BOOLEAN_VALUE,
    'default': HAS_BOOLEAN_VALUE,
    defer: HAS_BOOLEAN_VALUE,
    disabled: HAS_BOOLEAN_VALUE,
    download: HAS_OVERLOADED_BOOLEAN_VALUE,
    draggable: HAS_STRING_BOOLEAN_VALUE,
    formNoValidate: HAS_BOOLEAN_VALUE,
    hidden: HAS_BOOLEAN_VALUE,
    loop: HAS_BOOLEAN_VALUE,
    // Caution; `option.selected` is not updated if `select.multiple` is
    // disabled with `removeAttribute`.
    multiple: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
    muted: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
    noValidate: HAS_BOOLEAN_VALUE,
    open: HAS_BOOLEAN_VALUE,
    playsInline: HAS_BOOLEAN_VALUE,
    readOnly: HAS_BOOLEAN_VALUE,
    required: HAS_BOOLEAN_VALUE,
    reversed: HAS_BOOLEAN_VALUE,
    rows: HAS_POSITIVE_NUMERIC_VALUE,
    rowSpan: HAS_NUMERIC_VALUE,
    scoped: HAS_BOOLEAN_VALUE,
    seamless: HAS_BOOLEAN_VALUE,
    selected: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
    size: HAS_POSITIVE_NUMERIC_VALUE,
    start: HAS_NUMERIC_VALUE,
    // support for projecting regular DOM Elements via V1 named slots ( shadow dom )
    span: HAS_POSITIVE_NUMERIC_VALUE,
    spellCheck: HAS_STRING_BOOLEAN_VALUE,
    // Style must be explicitly set in the attribute list. React components
    // expect a style object
    style: 0,
    // Keep it in the whitelist because it is case-sensitive for SVG.
    tabIndex: 0,
    // itemScope is for for Microdata support.
    // See http://schema.org/docs/gs.html
    itemScope: HAS_BOOLEAN_VALUE,
    // These attributes must stay in the white-list because they have
    // different attribute names (see DOMAttributeNames below)
    acceptCharset: 0,
    className: 0,
    htmlFor: 0,
    httpEquiv: 0,
    // Attributes with mutation methods must be specified in the whitelist
    // Set the string boolean flag to allow the behavior
    value: HAS_STRING_BOOLEAN_VALUE
  },
  DOMAttributeNames: {
    acceptCharset: 'accept-charset',
    className: 'class',
    htmlFor: 'for',
    httpEquiv: 'http-equiv'
  },
  DOMMutationMethods: {
    value: function (node, value) {
      if (value == null) {
        return node.removeAttribute('value');
      }

      // Number inputs get special treatment due to some edge cases in
      // Chrome. Let everything else assign the value attribute as normal.
      // https://github.com/facebook/react/issues/7253#issuecomment-236074326
      if (node.type !== 'number' || node.hasAttribute('value') === false) {
        node.setAttribute('value', '' + value);
      } else if (node.validity && !node.validity.badInput && node.ownerDocument.activeElement !== node) {
        // Don't assign an attribute if validation reports bad
        // input. Chrome will clear the value. Additionally, don't
        // operate on inputs that have focus, otherwise Chrome might
        // strip off trailing decimal places and cause the user's
        // cursor position to jump to the beginning of the input.
        //
        // In ReactDOMInput, we have an onBlur event that will trigger
        // this function again when focus is lost.
        node.setAttribute('value', '' + value);
      }
    }
  }
};

var HTMLDOMPropertyConfig_1 = HTMLDOMPropertyConfig;

var HAS_STRING_BOOLEAN_VALUE$1 = DOMProperty_1.injection.HAS_STRING_BOOLEAN_VALUE;


var NS = {
  xlink: 'http://www.w3.org/1999/xlink',
  xml: 'http://www.w3.org/XML/1998/namespace'
};

/**
 * This is a list of all SVG attributes that need special casing,
 * namespacing, or boolean value assignment.
 *
 * When adding attributes to this list, be sure to also add them to
 * the `possibleStandardNames` module to ensure casing and incorrect
 * name warnings.
 *
 * SVG Attributes List:
 * https://www.w3.org/TR/SVG/attindex.html
 * SMIL Spec:
 * https://www.w3.org/TR/smil
 */
var ATTRS = ['accent-height', 'alignment-baseline', 'arabic-form', 'baseline-shift', 'cap-height', 'clip-path', 'clip-rule', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'dominant-baseline', 'enable-background', 'fill-opacity', 'fill-rule', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'glyph-name', 'glyph-orientation-horizontal', 'glyph-orientation-vertical', 'horiz-adv-x', 'horiz-origin-x', 'image-rendering', 'letter-spacing', 'lighting-color', 'marker-end', 'marker-mid', 'marker-start', 'overline-position', 'overline-thickness', 'paint-order', 'panose-1', 'pointer-events', 'rendering-intent', 'shape-rendering', 'stop-color', 'stop-opacity', 'strikethrough-position', 'strikethrough-thickness', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'text-anchor', 'text-decoration', 'text-rendering', 'underline-position', 'underline-thickness', 'unicode-bidi', 'unicode-range', 'units-per-em', 'v-alphabetic', 'v-hanging', 'v-ideographic', 'v-mathematical', 'vector-effect', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'word-spacing', 'writing-mode', 'x-height', 'xlink:actuate', 'xlink:arcrole', 'xlink:href', 'xlink:role', 'xlink:show', 'xlink:title', 'xlink:type', 'xml:base', 'xmlns:xlink', 'xml:lang', 'xml:space'];

var SVGDOMPropertyConfig = {
  Properties: {
    autoReverse: HAS_STRING_BOOLEAN_VALUE$1,
    externalResourcesRequired: HAS_STRING_BOOLEAN_VALUE$1,
    preserveAlpha: HAS_STRING_BOOLEAN_VALUE$1
  },
  DOMAttributeNames: {
    autoReverse: 'autoReverse',
    externalResourcesRequired: 'externalResourcesRequired',
    preserveAlpha: 'preserveAlpha'
  },
  DOMAttributeNamespaces: {
    xlinkActuate: NS.xlink,
    xlinkArcrole: NS.xlink,
    xlinkHref: NS.xlink,
    xlinkRole: NS.xlink,
    xlinkShow: NS.xlink,
    xlinkTitle: NS.xlink,
    xlinkType: NS.xlink,
    xmlBase: NS.xml,
    xmlLang: NS.xml,
    xmlSpace: NS.xml
  }
};

var CAMELIZE = /[\-\:]([a-z])/g;
var capitalize = function (token) {
  return token[1].toUpperCase();
};

ATTRS.forEach(function (original) {
  var reactName = original.replace(CAMELIZE, capitalize);

  SVGDOMPropertyConfig.Properties[reactName] = 0;
  SVGDOMPropertyConfig.DOMAttributeNames[reactName] = original;
});

var SVGDOMPropertyConfig_1 = SVGDOMPropertyConfig;

DOMProperty_1.injection.injectDOMPropertyConfig(HTMLDOMPropertyConfig_1);
DOMProperty_1.injection.injectDOMPropertyConfig(SVGDOMPropertyConfig_1);

var injectInternals = ReactFiberDevToolsHook.injectInternals;

var ELEMENT_NODE = HTMLNodeType_1.ELEMENT_NODE;
var TEXT_NODE = HTMLNodeType_1.TEXT_NODE;
var COMMENT_NODE = HTMLNodeType_1.COMMENT_NODE;
var DOCUMENT_NODE = HTMLNodeType_1.DOCUMENT_NODE;
var DOCUMENT_FRAGMENT_NODE = HTMLNodeType_1.DOCUMENT_FRAGMENT_NODE;

var ROOT_ATTRIBUTE_NAME = DOMProperty_1.ROOT_ATTRIBUTE_NAME;




var getChildNamespace = DOMNamespaces.getChildNamespace;
var createElement = ReactDOMFiberComponent_1.createElement;
var createTextNode = ReactDOMFiberComponent_1.createTextNode;
var setInitialProperties = ReactDOMFiberComponent_1.setInitialProperties;
var diffProperties = ReactDOMFiberComponent_1.diffProperties;
var updateProperties = ReactDOMFiberComponent_1.updateProperties;
var diffHydratedProperties = ReactDOMFiberComponent_1.diffHydratedProperties;
var diffHydratedText = ReactDOMFiberComponent_1.diffHydratedText;
var warnForDeletedHydratableElement = ReactDOMFiberComponent_1.warnForDeletedHydratableElement;
var warnForDeletedHydratableText = ReactDOMFiberComponent_1.warnForDeletedHydratableText;
var warnForInsertedHydratedElement = ReactDOMFiberComponent_1.warnForInsertedHydratedElement;
var warnForInsertedHydratedText = ReactDOMFiberComponent_1.warnForInsertedHydratedText;
var precacheFiberNode = ReactDOMComponentTree_1.precacheFiberNode;
var updateFiberProps = ReactDOMComponentTree_1.updateFiberProps;


ReactControlledComponent_1.injection.injectFiberControlledHostComponent(ReactDOMFiberComponent_1);

var eventsEnabled = null;
var selectionInformation = null;

/**
 * True if the supplied DOM node is a valid node element.
 *
 * @param {?DOMElement} node The candidate DOM node.
 * @return {boolean} True if the DOM is a valid DOM node.
 * @internal
 */
function isValidContainer(node) {
  return !!(node && (node.nodeType === ELEMENT_NODE || node.nodeType === DOCUMENT_NODE || node.nodeType === DOCUMENT_FRAGMENT_NODE || node.nodeType === COMMENT_NODE && node.nodeValue === ' react-mount-point-unstable '));
}

function getReactRootElementInContainer(container) {
  if (!container) {
    return null;
  }

  if (container.nodeType === DOCUMENT_NODE) {
    return container.documentElement;
  } else {
    return container.firstChild;
  }
}

function shouldHydrateDueToLegacyHeuristic(container) {
  var rootElement = getReactRootElementInContainer(container);
  return !!(rootElement && rootElement.nodeType === ELEMENT_NODE && rootElement.hasAttribute(ROOT_ATTRIBUTE_NAME));
}

function shouldAutoFocusHostComponent(type, props) {
  switch (type) {
    case 'button':
    case 'input':
    case 'select':
    case 'textarea':
      return !!props.autoFocus;
  }
  return false;
}

var DOMRenderer = ReactFiberReconciler({
  getRootHostContext: function (rootContainerInstance) {
    var type = void 0;
    var namespace = void 0;
    var nodeType = rootContainerInstance.nodeType;
    switch (nodeType) {
      case DOCUMENT_NODE:
      case DOCUMENT_FRAGMENT_NODE:
        {
          type = nodeType === DOCUMENT_NODE ? '#document' : '#fragment';
          var root = rootContainerInstance.documentElement;
          namespace = root ? root.namespaceURI : getChildNamespace(null, '');
          break;
        }
      default:
        {
          var container = nodeType === COMMENT_NODE ? rootContainerInstance.parentNode : rootContainerInstance;
          var ownNamespace = container.namespaceURI || null;
          type = container.tagName;
          namespace = getChildNamespace(ownNamespace, type);
          break;
        }
    }
    return namespace;
  },
  getChildHostContext: function (parentHostContext, type) {
    var parentNamespace = parentHostContext;
    return getChildNamespace(parentNamespace, type);
  },
  getPublicInstance: function (instance) {
    return instance;
  },
  prepareForCommit: function () {
    eventsEnabled = ReactBrowserEventEmitter_1.isEnabled();
    selectionInformation = ReactInputSelection_1.getSelectionInformation();
    ReactBrowserEventEmitter_1.setEnabled(false);
  },
  resetAfterCommit: function () {
    ReactInputSelection_1.restoreSelection(selectionInformation);
    selectionInformation = null;
    ReactBrowserEventEmitter_1.setEnabled(eventsEnabled);
    eventsEnabled = null;
  },
  createInstance: function (type, props, rootContainerInstance, hostContext, internalInstanceHandle) {
    var parentNamespace = void 0;
    {
      parentNamespace = hostContext;
    }
    var domElement = createElement(type, props, rootContainerInstance, parentNamespace);
    precacheFiberNode(internalInstanceHandle, domElement);
    updateFiberProps(domElement, props);
    return domElement;
  },
  appendInitialChild: function (parentInstance, child) {
    parentInstance.appendChild(child);
  },
  finalizeInitialChildren: function (domElement, type, props, rootContainerInstance) {
    setInitialProperties(domElement, type, props, rootContainerInstance);
    return shouldAutoFocusHostComponent(type, props);
  },
  prepareUpdate: function (domElement, type, oldProps, newProps, rootContainerInstance, hostContext) {
    return diffProperties(domElement, type, oldProps, newProps, rootContainerInstance);
  },
  commitMount: function (domElement, type, newProps, internalInstanceHandle) {
    domElement.focus();
  },
  commitUpdate: function (domElement, updatePayload, type, oldProps, newProps, internalInstanceHandle) {
    // Update the props handle so that we know which props are the ones with
    // with current event handlers.
    updateFiberProps(domElement, newProps);
    // Apply the diff to the DOM node.
    updateProperties(domElement, updatePayload, type, oldProps, newProps);
  },
  shouldSetTextContent: function (type, props) {
    return type === 'textarea' || typeof props.children === 'string' || typeof props.children === 'number' || typeof props.dangerouslySetInnerHTML === 'object' && props.dangerouslySetInnerHTML !== null && typeof props.dangerouslySetInnerHTML.__html === 'string';
  },
  resetTextContent: function (domElement) {
    domElement.textContent = '';
  },
  shouldDeprioritizeSubtree: function (type, props) {
    return !!props.hidden;
  },
  createTextInstance: function (text, rootContainerInstance, hostContext, internalInstanceHandle) {
    var textNode = createTextNode(text, rootContainerInstance);
    precacheFiberNode(internalInstanceHandle, textNode);
    return textNode;
  },
  commitTextUpdate: function (textInstance, oldText, newText) {
    textInstance.nodeValue = newText;
  },
  appendChild: function (parentInstance, child) {
    parentInstance.appendChild(child);
  },
  appendChildToContainer: function (container, child) {
    if (container.nodeType === COMMENT_NODE) {
      container.parentNode.insertBefore(child, container);
    } else {
      container.appendChild(child);
    }
  },
  insertBefore: function (parentInstance, child, beforeChild) {
    parentInstance.insertBefore(child, beforeChild);
  },
  insertInContainerBefore: function (container, child, beforeChild) {
    if (container.nodeType === COMMENT_NODE) {
      container.parentNode.insertBefore(child, beforeChild);
    } else {
      container.insertBefore(child, beforeChild);
    }
  },
  removeChild: function (parentInstance, child) {
    parentInstance.removeChild(child);
  },
  removeChildFromContainer: function (container, child) {
    if (container.nodeType === COMMENT_NODE) {
      container.parentNode.removeChild(child);
    } else {
      container.removeChild(child);
    }
  },
  canHydrateInstance: function (instance, type, props) {
    return instance.nodeType === ELEMENT_NODE && type === instance.nodeName.toLowerCase();
  },
  canHydrateTextInstance: function (instance, text) {
    if (text === '') {
      // Empty strings are not parsed by HTML so there won't be a correct match here.
      return false;
    }
    return instance.nodeType === TEXT_NODE;
  },
  getNextHydratableSibling: function (instance) {
    var node = instance.nextSibling;
    // Skip non-hydratable nodes.
    while (node && node.nodeType !== ELEMENT_NODE && node.nodeType !== TEXT_NODE) {
      node = node.nextSibling;
    }
    return node;
  },
  getFirstHydratableChild: function (parentInstance) {
    var next = parentInstance.firstChild;
    // Skip non-hydratable nodes.
    while (next && next.nodeType !== ELEMENT_NODE && next.nodeType !== TEXT_NODE) {
      next = next.nextSibling;
    }
    return next;
  },
  hydrateInstance: function (instance, type, props, rootContainerInstance, hostContext, internalInstanceHandle) {
    precacheFiberNode(internalInstanceHandle, instance);
    // TODO: Possibly defer this until the commit phase where all the events
    // get attached.
    updateFiberProps(instance, props);
    var parentNamespace = void 0;
    {
      parentNamespace = hostContext;
    }
    return diffHydratedProperties(instance, type, props, parentNamespace, rootContainerInstance);
  },
  hydrateTextInstance: function (textInstance, text, internalInstanceHandle) {
    precacheFiberNode(internalInstanceHandle, textInstance);
    return diffHydratedText(textInstance, text);
  },
  didNotHydrateInstance: function (parentInstance, instance) {
    if (instance.nodeType === 1) {
      warnForDeletedHydratableElement(parentInstance, instance);
    } else {
      warnForDeletedHydratableText(parentInstance, instance);
    }
  },
  didNotFindHydratableInstance: function (parentInstance, type, props) {
    warnForInsertedHydratedElement(parentInstance, type, props);
  },
  didNotFindHydratableTextInstance: function (parentInstance, text) {
    warnForInsertedHydratedText(parentInstance, text);
  },


  scheduleDeferredCallback: ReactDOMFrameScheduling.rIC,

  useSyncScheduling: !ReactDOMFeatureFlags_1.fiberAsyncScheduling
});

ReactGenericBatching_1.injection.injectFiberBatchedUpdates(DOMRenderer.batchedUpdates);

function renderSubtreeIntoContainer(parentComponent, children, container, forceHydrate, callback) {
  !isValidContainer(container) ? reactProdInvariant_1('200') : void 0;

  var root = container._reactRootContainer;
  if (!root) {
    var shouldHydrate = forceHydrate || shouldHydrateDueToLegacyHeuristic(container);
    // First clear any existing content.
    if (!shouldHydrate) {
      var warned = false;
      var rootSibling = void 0;
      while (rootSibling = container.lastChild) {
        container.removeChild(rootSibling);
      }
    }
    var newRoot = DOMRenderer.createContainer(container);
    root = container._reactRootContainer = newRoot;
    // Initial mount should not be batched.
    DOMRenderer.unbatchedUpdates(function () {
      DOMRenderer.updateContainer(children, newRoot, parentComponent, callback);
    });
  } else {
    DOMRenderer.updateContainer(children, root, parentComponent, callback);
  }
  return DOMRenderer.getPublicRootInstance(root);
}

function createPortal(children, container) {
  var key = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;

  !isValidContainer(container) ? reactProdInvariant_1('200') : void 0;
  // TODO: pass ReactDOM portal implementation as third argument
  return ReactPortal.createPortal(children, container, null, key);
}

var ReactDOMFiber = {
  createPortal: createPortal,

  findDOMNode: function (componentOrElement) {
    if (componentOrElement == null) {
      return null;
    }
    if (componentOrElement.nodeType === ELEMENT_NODE) {
      return componentOrElement;
    }

    var inst = ReactInstanceMap_1.get(componentOrElement);
    if (inst) {
      return DOMRenderer.findHostInstance(inst);
    }

    if (typeof componentOrElement.render === 'function') {
      reactProdInvariant_1('188');
    } else {
      reactProdInvariant_1('213', Object.keys(componentOrElement));
    }
  },
  hydrate: function (element, container, callback) {
    // TODO: throw or warn if we couldn't hydrate?
    return renderSubtreeIntoContainer(null, element, container, true, callback);
  },
  render: function (element, container, callback) {
    return renderSubtreeIntoContainer(null, element, container, false, callback);
  },
  unstable_renderSubtreeIntoContainer: function (parentComponent, element, containerNode, callback) {
    !(parentComponent != null && ReactInstanceMap_1.has(parentComponent)) ? reactProdInvariant_1('38') : void 0;
    return renderSubtreeIntoContainer(parentComponent, element, containerNode, false, callback);
  },
  unmountComponentAtNode: function (container) {
    !isValidContainer(container) ? reactProdInvariant_1('40') : void 0;

    if (container._reactRootContainer) {
      DOMRenderer.unbatchedUpdates(function () {
        renderSubtreeIntoContainer(null, null, container, false, function () {
          container._reactRootContainer = null;
        });
      });
      // If you call unmountComponentAtNode twice in quick succession, you'll
      // get `true` twice. That's probably fine?
      return true;
    } else {
      return false;
    }
  },


  // Temporary alias since we already shipped React 16 RC with it.
  // TODO: remove in React 17.
  unstable_createPortal: createPortal,

  unstable_batchedUpdates: ReactGenericBatching_1.batchedUpdates,

  unstable_deferredUpdates: DOMRenderer.deferredUpdates,

  flushSync: DOMRenderer.flushSync,

  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED: {
    // For TapEventPlugin which is popular in open source
    EventPluginHub: EventPluginHub_1,
    // Used by test-utils
    EventPluginRegistry: EventPluginRegistry_1,
    EventPropagators: EventPropagators_1,
    ReactControlledComponent: ReactControlledComponent_1,
    ReactDOMComponentTree: ReactDOMComponentTree_1,
    ReactDOMEventListener: ReactDOMEventListener_1
  }
};

var foundDevTools = injectInternals({
  findFiberByHostInstance: ReactDOMComponentTree_1.getClosestInstanceFromNode,
  findHostInstanceByFiber: DOMRenderer.findHostInstance,
  // This is an enum because we may add more (e.g. profiler build)
  bundleType: 0,
  version: ReactVersion,
  rendererPackageName: 'react-dom'
});

var ReactDOMFiberEntry = ReactDOMFiber;

return ReactDOMFiberEntry;

})));

react.production.js

/** @license React v16.0.0
 * react.production.min.js
 *
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.React = factory());
}(this, (function () { 'use strict';

/*
object-assign
(c) Sindre Sorhus
@license MIT
*/

/* eslint-disable no-unused-vars */
var getOwnPropertySymbols = Object.getOwnPropertySymbols;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function toObject(val) {
	if (val === null || val === undefined) {
		throw new TypeError('Object.assign cannot be called with null or undefined');
	}

	return Object(val);
}

function shouldUseNative() {
	try {
		if (!Object.assign) {
			return false;
		}

		// Detect buggy property enumeration order in older V8 versions.

		// https://bugs.chromium.org/p/v8/issues/detail?id=4118
		var test1 = new String('abc');  // eslint-disable-line no-new-wrappers
		test1[5] = 'de';
		if (Object.getOwnPropertyNames(test1)[0] === '5') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test2 = {};
		for (var i = 0; i < 10; i++) {
			test2['_' + String.fromCharCode(i)] = i;
		}
		var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
			return test2[n];
		});
		if (order2.join('') !== '0123456789') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test3 = {};
		'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
			test3[letter] = letter;
		});
		if (Object.keys(Object.assign({}, test3)).join('') !==
				'abcdefghijklmnopqrst') {
			return false;
		}

		return true;
	} catch (err) {
		// We don't expect any of the above to throw, but better to be safe.
		return false;
	}
}

var index = shouldUseNative() ? Object.assign : function (target, source) {
	var from;
	var to = toObject(target);
	var symbols;

	for (var s = 1; s < arguments.length; s++) {
		from = Object(arguments[s]);

		for (var key in from) {
			if (hasOwnProperty.call(from, key)) {
				to[key] = from[key];
			}
		}

		if (getOwnPropertySymbols) {
			symbols = getOwnPropertySymbols(from);
			for (var i = 0; i < symbols.length; i++) {
				if (propIsEnumerable.call(from, symbols[i])) {
					to[symbols[i]] = from[symbols[i]];
				}
			}
		}
	}

	return to;
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule reactProdInvariant
 * 
 */
/**
 * WARNING: DO NOT manually require this module.
 * This is a replacement for `invariant(...)` used by the error code system
 * and will _only_ be required by the corresponding babel pass.
 * It always throws.
 */

function reactProdInvariant(code) {
  var argCount = arguments.length - 1;

  var message = 'Minified React error #' + code + '; visit ' + 'http://facebook.github.io/react/docs/error-decoder.html?invariant=' + code;

  for (var argIdx = 0; argIdx < argCount; argIdx++) {
    message += '&args[]=' + encodeURIComponent(arguments[argIdx + 1]);
  }

  message += ' for the full message or use the non-minified dev environment' + ' for full errors and additional helpful warnings.';

  var error = new Error(message);
  error.name = 'Invariant Violation';
  error.framesToPop = 1; // we don't care about reactProdInvariant's own frame

  throw error;
}

var reactProdInvariant_1 = reactProdInvariant;

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactNoopUpdateQueue
 */

function warnNoop(publicInstance, callerName) {
  
}

/**
 * This is the abstract API for an update queue.
 */
var ReactNoopUpdateQueue = {
  /**
   * Checks whether or not this composite component is mounted.
   * @param {ReactClass} publicInstance The instance we want to test.
   * @return {boolean} True if mounted, false otherwise.
   * @protected
   * @final
   */
  isMounted: function (publicInstance) {
    return false;
  },

  /**
   * Forces an update. This should only be invoked when it is known with
   * certainty that we are **not** in a DOM transaction.
   *
   * You may want to call this when you know that some deeper aspect of the
   * component's state has changed but `setState` was not called.
   *
   * This will not invoke `shouldComponentUpdate`, but it will invoke
   * `componentWillUpdate` and `componentDidUpdate`.
   *
   * @param {ReactClass} publicInstance The instance that should rerender.
   * @param {?function} callback Called after component is updated.
   * @param {?string} callerName name of the calling function in the public API.
   * @internal
   */
  enqueueForceUpdate: function (publicInstance, callback, callerName) {
    warnNoop(publicInstance, 'forceUpdate');
  },

  /**
   * Replaces all of the state. Always use this or `setState` to mutate state.
   * You should treat `this.state` as immutable.
   *
   * There is no guarantee that `this.state` will be immediately updated, so
   * accessing `this.state` after calling this method may return the old value.
   *
   * @param {ReactClass} publicInstance The instance that should rerender.
   * @param {object} completeState Next state.
   * @param {?function} callback Called after component is updated.
   * @param {?string} callerName name of the calling function in the public API.
   * @internal
   */
  enqueueReplaceState: function (publicInstance, completeState, callback, callerName) {
    warnNoop(publicInstance, 'replaceState');
  },

  /**
   * Sets a subset of the state. This only exists because _pendingState is
   * internal. This provides a merging strategy that is not available to deep
   * properties which is confusing. TODO: Expose pendingState or don't use it
   * during the merge.
   *
   * @param {ReactClass} publicInstance The instance that should rerender.
   * @param {object} partialState Next partial state to be merged with state.
   * @param {?function} callback Called after component is updated.
   * @param {?string} Name of the calling function in the public API.
   * @internal
   */
  enqueueSetState: function (publicInstance, partialState, callback, callerName) {
    warnNoop(publicInstance, 'setState');
  }
};

var ReactNoopUpdateQueue_1 = ReactNoopUpdateQueue;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

var emptyObject = {};

var emptyObject_1 = emptyObject;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

/**
 * Copyright (c) 2014-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule lowPriorityWarning
 */

/**
 * Base class helpers for the updating state of a component.
 */
function ReactComponent(props, context, updater) {
  this.props = props;
  this.context = context;
  this.refs = emptyObject_1;
  // We initialize the default updater but the real one gets injected by the
  // renderer.
  this.updater = updater || ReactNoopUpdateQueue_1;
}

ReactComponent.prototype.isReactComponent = {};

/**
 * Sets a subset of the state. Always use this to mutate
 * state. You should treat `this.state` as immutable.
 *
 * There is no guarantee that `this.state` will be immediately updated, so
 * accessing `this.state` after calling this method may return the old value.
 *
 * There is no guarantee that calls to `setState` will run synchronously,
 * as they may eventually be batched together.  You can provide an optional
 * callback that will be executed when the call to setState is actually
 * completed.
 *
 * When a function is provided to setState, it will be called at some point in
 * the future (not synchronously). It will be called with the up to date
 * component arguments (state, props, context). These values can be different
 * from this.* because your function may be called after receiveProps but before
 * shouldComponentUpdate, and this new state, props, and context will not yet be
 * assigned to this.
 *
 * @param {object|function} partialState Next partial state or function to
 *        produce next partial state to be merged with current state.
 * @param {?function} callback Called after state is updated.
 * @final
 * @protected
 */
ReactComponent.prototype.setState = function (partialState, callback) {
  !(typeof partialState === 'object' || typeof partialState === 'function' || partialState == null) ? reactProdInvariant_1('85') : void 0;
  this.updater.enqueueSetState(this, partialState, callback, 'setState');
};

/**
 * Forces an update. This should only be invoked when it is known with
 * certainty that we are **not** in a DOM transaction.
 *
 * You may want to call this when you know that some deeper aspect of the
 * component's state has changed but `setState` was not called.
 *
 * This will not invoke `shouldComponentUpdate`, but it will invoke
 * `componentWillUpdate` and `componentDidUpdate`.
 *
 * @param {?function} callback Called after update is complete.
 * @final
 * @protected
 */
ReactComponent.prototype.forceUpdate = function (callback) {
  this.updater.enqueueForceUpdate(this, callback, 'forceUpdate');
};

/**
 * Deprecated APIs. These APIs used to exist on classic React classes but since
 * we would like to deprecate them, we're not going to move them over to this
 * modern base class. Instead, we define a getter that warns if it's accessed.
 */
/**
 * Base class helpers for the updating state of a component.
 */
function ReactPureComponent(props, context, updater) {
  // Duplicated from ReactComponent.
  this.props = props;
  this.context = context;
  this.refs = emptyObject_1;
  // We initialize the default updater but the real one gets injected by the
  // renderer.
  this.updater = updater || ReactNoopUpdateQueue_1;
}

function ComponentDummy() {}
ComponentDummy.prototype = ReactComponent.prototype;
var pureComponentPrototype = ReactPureComponent.prototype = new ComponentDummy();
pureComponentPrototype.constructor = ReactPureComponent;
// Avoid an extra prototype jump for these methods.
index(pureComponentPrototype, ReactComponent.prototype);
pureComponentPrototype.isPureReactComponent = true;

function ReactAsyncComponent(props, context, updater) {
  // Duplicated from ReactComponent.
  this.props = props;
  this.context = context;
  this.refs = emptyObject_1;
  // We initialize the default updater but the real one gets injected by the
  // renderer.
  this.updater = updater || ReactNoopUpdateQueue_1;
}

var asyncComponentPrototype = ReactAsyncComponent.prototype = new ComponentDummy();
asyncComponentPrototype.constructor = ReactAsyncComponent;
// Avoid an extra prototype jump for these methods.
index(asyncComponentPrototype, ReactComponent.prototype);
asyncComponentPrototype.unstable_isAsyncReactComponent = true;
asyncComponentPrototype.render = function () {
  return this.props.children;
};

var ReactBaseClasses = {
  Component: ReactComponent,
  PureComponent: ReactPureComponent,
  AsyncComponent: ReactAsyncComponent
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactCurrentOwner
 * 
 */

/**
 * Keeps track of the current owner.
 *
 * The current owner is the component who should own any components that are
 * currently being constructed.
 */
var ReactCurrentOwner = {
  /**
   * @internal
   * @type {ReactComponent}
   */
  current: null
};

var ReactCurrentOwner_1 = ReactCurrentOwner;

var hasOwnProperty$1 = Object.prototype.hasOwnProperty;

// The Symbol used to tag the ReactElement type. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_ELEMENT_TYPE$1 = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.element') || 0xeac7;

var RESERVED_PROPS = {
  key: true,
  ref: true,
  __self: true,
  __source: true
};

function hasValidRef(config) {
  return config.ref !== undefined;
}

function hasValidKey(config) {
  return config.key !== undefined;
}

/**
 * Factory method to create a new React element. This no longer adheres to
 * the class pattern, so do not use new to call it. Also, no instanceof check
 * will work. Instead test $$typeof field against Symbol.for('react.element') to check
 * if something is a React Element.
 *
 * @param {*} type
 * @param {*} key
 * @param {string|object} ref
 * @param {*} self A *temporary* helper to detect places where `this` is
 * different from the `owner` when React.createElement is called, so that we
 * can warn. We want to get rid of owner and replace string `ref`s with arrow
 * functions, and as long as `this` and owner are the same, there will be no
 * change in behavior.
 * @param {*} source An annotation object (added by a transpiler or otherwise)
 * indicating filename, line number, and/or other information.
 * @param {*} owner
 * @param {*} props
 * @internal
 */
var ReactElement = function (type, key, ref, self, source, owner, props) {
  var element = {
    // This tag allow us to uniquely identify this as a React Element
    $$typeof: REACT_ELEMENT_TYPE$1,

    // Built-in properties that belong on the element
    type: type,
    key: key,
    ref: ref,
    props: props,

    // Record the component responsible for creating this element.
    _owner: owner
  };

  return element;
};

/**
 * Create and return a new ReactElement of the given type.
 * See https://reactjs.org/docs/react-api.html#createelement
 */
ReactElement.createElement = function (type, config, children) {
  var propName;

  // Reserved names are extracted
  var props = {};

  var key = null;
  var ref = null;
  var self = null;
  var source = null;

  if (config != null) {
    if (hasValidRef(config)) {
      ref = config.ref;
    }
    if (hasValidKey(config)) {
      key = '' + config.key;
    }

    self = config.__self === undefined ? null : config.__self;
    source = config.__source === undefined ? null : config.__source;
    // Remaining properties are added to a new props object
    for (propName in config) {
      if (hasOwnProperty$1.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
        props[propName] = config[propName];
      }
    }
  }

  // Children can be more than one argument, and those are transferred onto
  // the newly allocated props object.
  var childrenLength = arguments.length - 2;
  if (childrenLength === 1) {
    props.children = children;
  } else if (childrenLength > 1) {
    var childArray = Array(childrenLength);
    for (var i = 0; i < childrenLength; i++) {
      childArray[i] = arguments[i + 2];
    }
    props.children = childArray;
  }

  // Resolve default props
  if (type && type.defaultProps) {
    var defaultProps = type.defaultProps;
    for (propName in defaultProps) {
      if (props[propName] === undefined) {
        props[propName] = defaultProps[propName];
      }
    }
  }
  return ReactElement(type, key, ref, self, source, ReactCurrentOwner_1.current, props);
};

/**
 * Return a function that produces ReactElements of a given type.
 * See https://reactjs.org/docs/react-api.html#createfactory
 */
ReactElement.createFactory = function (type) {
  var factory = ReactElement.createElement.bind(null, type);
  // Expose the type on the factory and the prototype so that it can be
  // easily accessed on elements. E.g. `<Foo />.type === Foo`.
  // This should not be named `constructor` since this may not be the function
  // that created the element, and it may not even be a constructor.
  // Legacy hook TODO: Warn if this is accessed
  factory.type = type;
  return factory;
};

ReactElement.cloneAndReplaceKey = function (oldElement, newKey) {
  var newElement = ReactElement(oldElement.type, newKey, oldElement.ref, oldElement._self, oldElement._source, oldElement._owner, oldElement.props);

  return newElement;
};

/**
 * Clone and return a new ReactElement using element as the starting point.
 * See https://reactjs.org/docs/react-api.html#cloneelement
 */
ReactElement.cloneElement = function (element, config, children) {
  var propName;

  // Original props are copied
  var props = index({}, element.props);

  // Reserved names are extracted
  var key = element.key;
  var ref = element.ref;
  // Self is preserved since the owner is preserved.
  var self = element._self;
  // Source is preserved since cloneElement is unlikely to be targeted by a
  // transpiler, and the original source is probably a better indicator of the
  // true owner.
  var source = element._source;

  // Owner will be preserved, unless ref is overridden
  var owner = element._owner;

  if (config != null) {
    if (hasValidRef(config)) {
      // Silently steal the ref from the parent.
      ref = config.ref;
      owner = ReactCurrentOwner_1.current;
    }
    if (hasValidKey(config)) {
      key = '' + config.key;
    }

    // Remaining properties override existing props
    var defaultProps;
    if (element.type && element.type.defaultProps) {
      defaultProps = element.type.defaultProps;
    }
    for (propName in config) {
      if (hasOwnProperty$1.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
        if (config[propName] === undefined && defaultProps !== undefined) {
          // Resolve default props
          props[propName] = defaultProps[propName];
        } else {
          props[propName] = config[propName];
        }
      }
    }
  }

  // Children can be more than one argument, and those are transferred onto
  // the newly allocated props object.
  var childrenLength = arguments.length - 2;
  if (childrenLength === 1) {
    props.children = children;
  } else if (childrenLength > 1) {
    var childArray = Array(childrenLength);
    for (var i = 0; i < childrenLength; i++) {
      childArray[i] = arguments[i + 2];
    }
    props.children = childArray;
  }

  return ReactElement(element.type, key, ref, self, source, owner, props);
};

/**
 * Verifies the object is a ReactElement.
 * See https://reactjs.org/docs/react-api.html#isvalidelement
 * @param {?object} object
 * @return {boolean} True if `object` is a valid component.
 * @final
 */
ReactElement.isValidElement = function (object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE$1;
};

var ReactElement_1 = ReactElement;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 */

function makeEmptyFunction(arg) {
  return function () {
    return arg;
  };
}

/**
 * This function accepts and discards inputs; it has no side effects. This is
 * primarily useful idiomatically for overridable function endpoints which
 * always need to be callable, since JS lacks a null-call idiom ala Cocoa.
 */
var emptyFunction = function emptyFunction() {};

emptyFunction.thatReturns = makeEmptyFunction;
emptyFunction.thatReturnsFalse = makeEmptyFunction(false);
emptyFunction.thatReturnsTrue = makeEmptyFunction(true);
emptyFunction.thatReturnsNull = makeEmptyFunction(null);
emptyFunction.thatReturnsThis = function () {
  return this;
};
emptyFunction.thatReturnsArgument = function (arg) {
  return arg;
};

var emptyFunction_1 = emptyFunction;

var ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
var FAUX_ITERATOR_SYMBOL = '@@iterator'; // Before Symbol spec.
// The Symbol used to tag the ReactElement type. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_ELEMENT_TYPE = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.element') || 0xeac7;

var SEPARATOR = '.';
var SUBSEPARATOR = ':';

/**
 * Escape and wrap key so it is safe to use as a reactid
 *
 * @param {string} key to be escaped.
 * @return {string} the escaped key.
 */
function escape(key) {
  var escapeRegex = /[=:]/g;
  var escaperLookup = {
    '=': '=0',
    ':': '=2'
  };
  var escapedString = ('' + key).replace(escapeRegex, function (match) {
    return escaperLookup[match];
  });

  return '$' + escapedString;
}

var userProvidedKeyEscapeRegex = /\/+/g;
function escapeUserProvidedKey(text) {
  return ('' + text).replace(userProvidedKeyEscapeRegex, '$&/');
}

var POOL_SIZE = 10;
var traverseContextPool = [];
function getPooledTraverseContext(mapResult, keyPrefix, mapFunction, mapContext) {
  if (traverseContextPool.length) {
    var traverseContext = traverseContextPool.pop();
    traverseContext.result = mapResult;
    traverseContext.keyPrefix = keyPrefix;
    traverseContext.func = mapFunction;
    traverseContext.context = mapContext;
    traverseContext.count = 0;
    return traverseContext;
  } else {
    return {
      result: mapResult,
      keyPrefix: keyPrefix,
      func: mapFunction,
      context: mapContext,
      count: 0
    };
  }
}

function releaseTraverseContext(traverseContext) {
  traverseContext.result = null;
  traverseContext.keyPrefix = null;
  traverseContext.func = null;
  traverseContext.context = null;
  traverseContext.count = 0;
  if (traverseContextPool.length < POOL_SIZE) {
    traverseContextPool.push(traverseContext);
  }
}

/**
 * @param {?*} children Children tree container.
 * @param {!string} nameSoFar Name of the key path so far.
 * @param {!function} callback Callback to invoke with each child found.
 * @param {?*} traverseContext Used to pass information throughout the traversal
 * process.
 * @return {!number} The number of children in this subtree.
 */
function traverseAllChildrenImpl(children, nameSoFar, callback, traverseContext) {
  var type = typeof children;

  if (type === 'undefined' || type === 'boolean') {
    // All of the above are perceived as null.
    children = null;
  }

  if (children === null || type === 'string' || type === 'number' ||
  // The following is inlined from ReactElement. This means we can optimize
  // some checks. React Fiber also inlines this logic for similar purposes.
  type === 'object' && children.$$typeof === REACT_ELEMENT_TYPE) {
    callback(traverseContext, children,
    // If it's the only child, treat the name as if it was wrapped in an array
    // so that it's consistent if the number of children grows.
    nameSoFar === '' ? SEPARATOR + getComponentKey(children, 0) : nameSoFar);
    return 1;
  }

  var child;
  var nextName;
  var subtreeCount = 0; // Count of children found in the current subtree.
  var nextNamePrefix = nameSoFar === '' ? SEPARATOR : nameSoFar + SUBSEPARATOR;

  if (Array.isArray(children)) {
    for (var i = 0; i < children.length; i++) {
      child = children[i];
      nextName = nextNamePrefix + getComponentKey(child, i);
      subtreeCount += traverseAllChildrenImpl(child, nextName, callback, traverseContext);
    }
  } else {
    var iteratorFn = ITERATOR_SYMBOL && children[ITERATOR_SYMBOL] || children[FAUX_ITERATOR_SYMBOL];
    if (typeof iteratorFn === 'function') {
      var iterator = iteratorFn.call(children);
      var step;
      var ii = 0;
      while (!(step = iterator.next()).done) {
        child = step.value;
        nextName = nextNamePrefix + getComponentKey(child, ii++);
        subtreeCount += traverseAllChildrenImpl(child, nextName, callback, traverseContext);
      }
    } else if (type === 'object') {
      var addendum = '';
      var childrenString = '' + children;
      reactProdInvariant_1('31', childrenString === '[object Object]' ? 'object with keys {' + Object.keys(children).join(', ') + '}' : childrenString, addendum);
    }
  }

  return subtreeCount;
}

/**
 * Traverses children that are typically specified as `props.children`, but
 * might also be specified through attributes:
 *
 * - `traverseAllChildren(this.props.children, ...)`
 * - `traverseAllChildren(this.props.leftPanelChildren, ...)`
 *
 * The `traverseContext` is an optional argument that is passed through the
 * entire traversal. It can be used to store accumulations or anything else that
 * the callback might find relevant.
 *
 * @param {?*} children Children tree object.
 * @param {!function} callback To invoke upon traversing each child.
 * @param {?*} traverseContext Context for traversal.
 * @return {!number} The number of children in this subtree.
 */
function traverseAllChildren(children, callback, traverseContext) {
  if (children == null) {
    return 0;
  }

  return traverseAllChildrenImpl(children, '', callback, traverseContext);
}

/**
 * Generate a key string that identifies a component within a set.
 *
 * @param {*} component A component that could contain a manual key.
 * @param {number} index Index that is used if a manual key is not provided.
 * @return {string}
 */
function getComponentKey(component, index) {
  // Do some typechecking here since we call this blindly. We want to ensure
  // that we don't block potential future ES APIs.
  if (typeof component === 'object' && component !== null && component.key != null) {
    // Explicit key
    return escape(component.key);
  }
  // Implicit key determined by the index in the set
  return index.toString(36);
}

function forEachSingleChild(bookKeeping, child, name) {
  var func = bookKeeping.func,
      context = bookKeeping.context;

  func.call(context, child, bookKeeping.count++);
}

/**
 * Iterates through children that are typically specified as `props.children`.
 *
 * See https://reactjs.org/docs/react-api.html#react.children.foreach
 *
 * The provided forEachFunc(child, index) will be called for each
 * leaf child.
 *
 * @param {?*} children Children tree container.
 * @param {function(*, int)} forEachFunc
 * @param {*} forEachContext Context for forEachContext.
 */
function forEachChildren(children, forEachFunc, forEachContext) {
  if (children == null) {
    return children;
  }
  var traverseContext = getPooledTraverseContext(null, null, forEachFunc, forEachContext);
  traverseAllChildren(children, forEachSingleChild, traverseContext);
  releaseTraverseContext(traverseContext);
}

function mapSingleChildIntoContext(bookKeeping, child, childKey) {
  var result = bookKeeping.result,
      keyPrefix = bookKeeping.keyPrefix,
      func = bookKeeping.func,
      context = bookKeeping.context;


  var mappedChild = func.call(context, child, bookKeeping.count++);
  if (Array.isArray(mappedChild)) {
    mapIntoWithKeyPrefixInternal(mappedChild, result, childKey, emptyFunction_1.thatReturnsArgument);
  } else if (mappedChild != null) {
    if (ReactElement_1.isValidElement(mappedChild)) {
      mappedChild = ReactElement_1.cloneAndReplaceKey(mappedChild,
      // Keep both the (mapped) and old keys if they differ, just as
      // traverseAllChildren used to do for objects as children
      keyPrefix + (mappedChild.key && (!child || child.key !== mappedChild.key) ? escapeUserProvidedKey(mappedChild.key) + '/' : '') + childKey);
    }
    result.push(mappedChild);
  }
}

function mapIntoWithKeyPrefixInternal(children, array, prefix, func, context) {
  var escapedPrefix = '';
  if (prefix != null) {
    escapedPrefix = escapeUserProvidedKey(prefix) + '/';
  }
  var traverseContext = getPooledTraverseContext(array, escapedPrefix, func, context);
  traverseAllChildren(children, mapSingleChildIntoContext, traverseContext);
  releaseTraverseContext(traverseContext);
}

/**
 * Maps children that are typically specified as `props.children`.
 *
 * See https://reactjs.org/docs/react-api.html#react.children.map
 *
 * The provided mapFunction(child, key, index) will be called for each
 * leaf child.
 *
 * @param {?*} children Children tree container.
 * @param {function(*, int)} func The map function.
 * @param {*} context Context for mapFunction.
 * @return {object} Object containing the ordered map of results.
 */
function mapChildren(children, func, context) {
  if (children == null) {
    return children;
  }
  var result = [];
  mapIntoWithKeyPrefixInternal(children, result, null, func, context);
  return result;
}

/**
 * Count the number of children that are typically specified as
 * `props.children`.
 *
 * See https://reactjs.org/docs/react-api.html#react.children.count
 *
 * @param {?*} children Children tree container.
 * @return {number} The number of children.
 */
function countChildren(children, context) {
  return traverseAllChildren(children, emptyFunction_1.thatReturnsNull, null);
}

/**
 * Flatten a children object (typically specified as `props.children`) and
 * return an array with appropriately re-keyed children.
 *
 * See https://reactjs.org/docs/react-api.html#react.children.toarray
 */
function toArray(children) {
  var result = [];
  mapIntoWithKeyPrefixInternal(children, result, null, emptyFunction_1.thatReturnsArgument);
  return result;
}

var ReactChildren = {
  forEach: forEachChildren,
  map: mapChildren,
  count: countChildren,
  toArray: toArray
};

var ReactChildren_1 = ReactChildren;

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @providesModule ReactVersion
 */

var ReactVersion = '16.0.0';

/**
 * Returns the first child in a collection of children and verifies that there
 * is only one child in the collection.
 *
 * See https://reactjs.org/docs/react-api.html#react.children.only
 *
 * The current implementation of this function assumes that a single child gets
 * passed without a wrapper, but the purpose of this helper function is to
 * abstract away the particular structure of children.
 *
 * @param {?object} children Child collection structure.
 * @return {ReactElement} The first and only `ReactElement` contained in the
 * structure.
 */
function onlyChild(children) {
  !ReactElement_1.isValidElement(children) ? reactProdInvariant_1('143') : void 0;
  return children;
}

var onlyChild_1 = onlyChild;

var createElement = ReactElement_1.createElement;
var createFactory = ReactElement_1.createFactory;
var cloneElement = ReactElement_1.cloneElement;

var React = {
  Children: {
    map: ReactChildren_1.map,
    forEach: ReactChildren_1.forEach,
    count: ReactChildren_1.count,
    toArray: ReactChildren_1.toArray,
    only: onlyChild_1
  },

  Component: ReactBaseClasses.Component,
  PureComponent: ReactBaseClasses.PureComponent,
  unstable_AsyncComponent: ReactBaseClasses.AsyncComponent,

  createElement: createElement,
  cloneElement: cloneElement,
  isValidElement: ReactElement_1.isValidElement,

  createFactory: createFactory,

  version: ReactVersion,

  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED: {
    ReactCurrentOwner: ReactCurrentOwner_1,
    // Used by renderers to avoid bundling object-assign twice in UMD bundles:
    assign: index
  }
};

var ReactEntry = React;

return ReactEntry;

})));