/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
  <script src="https://fb.me/react-0.14.3.min.js"></script>
  <script src="https://fb.me/react-dom-0.14.3.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/redux/3.0.4/redux.min.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
  <div id="root"></div>
<script id="jsbin-javascript">
// 3rd level reducer.
// Here, `state` refers to a single todo object.
'use strict';

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var todo = function todo(state, action) {
  console.log("todo reducer called");
  // Remember, no mutation.
  // Initial state is considered (or not, in the ADD_TODO case),
  // and used to construct a new state object, always.

  switch (action.type) {
    case 'ADD_TODO':
      console.log('todo ADD_TODO');
      return {
        id: action.id,
        text: action.text,
        completed: false
      };
    case 'TOGGLE_TODO':
      console.log('todo TOGGLE_TODO');
      // Bail out if the action is for a different todo than the one passed in.
      if (state.id !== action.id) {
        return state;
      }

      // ... below is ES7 "Object Rest Destructuring"
      // https://github.com/sebmarkbage/ecmascript-rest-spread/blob/master/Spread.md
      // Think of it as "and the rest", or "override these object properties"
      return _extends({}, state, {
        completed: !state.completed
      });
    default:
      return state;
  }
};

// 2nd level reducer
// Here, `state` refers to the array of todo objects
var todos = function todos(state, action) {
  if (state === undefined) state = [];

  console.log("todos reducer called");
  switch (action.type) {
    // Returns a new array of todos, containing the added todo as described by `action`.
    // The new todo is constructed by delegating to the `todo` reducer.
    case 'ADD_TODO':
      console.log('todos ADD_TODO');
      // ... below is ES6 "spread operator" (arrays only)
      return [].concat(_toConsumableArray(state), [todo(undefined, action)]);
    // Returns a new array of todos, with an individual todo's completed status
    // toggled as identified by `action.id`.
    // Must operate on entire list (seems wrong somehow).
    case 'TOGGLE_TODO':
      console.log('todos TOGGLE_TODO');
      return state.map(function (t) {
        return todo(t, action);
      });
    default:
      return state;
  }
};

// 2nd level reducer
// Here, `state` refers to a simple configuration string (enum/atom)
// Remember, we are only returning the state we are concerned with
var visibilityFilter = function visibilityFilter(state, action) {
  if (state === undefined) state = 'SHOW_ALL';

  console.log("visibilityFilter reducer called");
  switch (action.type) {
    case 'SET_VISIBILITY_FILTER':
      return action.filter;
    default:
      return state;
  }
};

// Top level reducer.
// combineReducers is not magic.
var _Redux = Redux;
var combineReducers = _Redux.combineReducers;

var todoApp = combineReducers({
  // n.b. following syntax is ES6 Object Initializer (shorthand property names)
  todos: todos, // todos: todos,
  visibilityFilter: visibilityFilter // visibilityFilter: visibilityFilter
});

var _Redux2 = Redux;
var createStore = _Redux2.createStore;

var store = createStore(todoApp);

var _React = React;
var Component = _React.Component;

// This looks like just a function, not a React component. (Right?)
// No! This is a "stateless component". It gets `props` passed in.
// https://facebook.github.io/react/blog/2015/09/10/react-v0.14-rc1.html#stateless-function-components
// Notice the curlybraces in the parameter list. This is destructuring
// `props` (e.g. filter = props.filter, children = props.children)
var Link = function Link(_ref) {
  var active = _ref.active;
  var children = _ref.children;
  var onClick = _ref.onClick;

  if (active) return React.createElement(
    'span',
    null,
    children
  );
  return React.createElement(
    'a',
    { href: '#',
      onClick: function (e) {
        e.preventDefault();
        onClick(filter);
      }
    },
    children
  );
};

// Container component. Provides data and behavior for presentational components.
// When it mounts, it subscribes to store changes, allowing it to independently
// re-render. It delegates presnetation to the Link component.

var FilterLink = (function (_Component) {
  _inherits(FilterLink, _Component);

  function FilterLink() {
    _classCallCheck(this, FilterLink);

    _get(Object.getPrototypeOf(FilterLink.prototype), 'constructor', this).apply(this, arguments);
  }

  _createClass(FilterLink, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      var _this = this;

      // n.b. Reads current state, but not subscribed.
      // If parent component does not update when store is updated, will render stale value.
      // Currently we re-render entire application when any state changes, but this is not efficient.
      // We will instead move store subscription to the lifecycle methods of container copmonents.
      // React provies a special forceUpdate method on component instances to force their rerendering.
      this.unsubscribe = store.subscribe(function () {
        _this.forceUpdate();
      });
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      this.unsubscribe();
    }
  }, {
    key: 'render',
    value: function render() {
      var props = this.props;
      var state = store.getState();

      return React.createElement(
        Link,
        {
          active: props.filter === state.visibilityFilter,
          onClick: function () {
            store.dispatch({
              type: 'SET_VISIBILITY_FILTER',
              filter: props.filter
            });
          }
        },
        props.children
      );
    }
  }]);

  return FilterLink;
})(Component);

var AddTodo = function AddTodo(_ref2) {
  var onAddClick = _ref2.onAddClick;

  var input = undefined;

  return React.createElement(
    'div',
    null,
    React.createElement('input', { ref: function (node) {
        // This is a newer 0.14 syntax where ref can be a callback.

        // n.b. no `this` available in a functional/stateless component.
        // Here, we're making a closure over `input`.
        input = node;
      } }),
    React.createElement(
      'button',
      { onClick: function () {
          onAddClick(input.value);
          input.value = '';
        } },
      'Add todo'
    )
  );
};

var Footer = function Footer() {
  return React.createElement(
    'p',
    null,
    'Show:',
    ' ',
    React.createElement(
      FilterLink,
      {
        filter: 'SHOW_ALL' },
      'All'
    ),
    ' ',
    React.createElement(
      FilterLink,
      {
        filter: 'SHOW_ACTIVE' },
      'Active'
    ),
    ' ',
    React.createElement(
      FilterLink,
      {
        filter: 'SHOW_COMPLETED' },
      'Completed'
    )
  );
};

var getVisibleTodos = function getVisibleTodos(todos, filter) {
  console.log('getVisibleTodos: todos=' + todos + ' filter=' + filter);
  switch (filter) {
    case 'SHOW_ALL':
      return todos;
    case 'SHOW_COMPLETED':
      return todos.filter(function (t) {
        return t.completed;
      });
    case 'SHOW_ACTIVE':
      return todos.filter(function (t) {
        return !t.completed;
      });
  }
};

var nextToDoId = 0; // global :shrug:

var TodoApp = function TodoApp(_ref3) {
  var todos = _ref3.todos;
  var visibilityFilter = _ref3.visibilityFilter;

  return React.createElement(
    'div',
    null,
    React.createElement(AddTodo, {
      onAddClick: function (text) {
        store.dispatch({
          type: 'ADD_TODO',
          id: nextToDoId++,
          text: text
        });
      }
    }),
    React.createElement(TodoList, {
      todos: getVisibleTodos(todos, visibilityFilter),
      onTodoClick: function (id) {
        store.dispatch({
          type: 'TOGGLE_TODO',
          id: id
        });
      }
    }),
    React.createElement(Footer, null)
  );
};

var Todo = function Todo(_ref4) {
  var onClick = _ref4.onClick;
  var completed = _ref4.completed;
  var text = _ref4.text;

  return React.createElement(
    'li',
    {
      onClick: onClick,
      style: { textDecoration: completed ? 'line-through' : 'none'
      }
    },
    text
  );
};

var TodoList = function TodoList(_ref5) {
  var todos = _ref5.todos;
  var onTodoClick = _ref5.onTodoClick;
  return React.createElement(
    'ul',
    null,
    todos.map(function (todo) {
      return React.createElement(Todo, _extends({
        key: todo.id
      }, todo, {
        onClick: function () {
          return onTodoClick(todo.id);
        }
      }));
    })
  );
};

var render = function render() {
  console.log('render called');
  // JSX Spread Attributes. https://facebook.github.io/react/docs/jsx-spread.html
  // <TodoApp {...store.getState()} />
  //    is equivalent to:
  // <ToDoApp
  //  todos={this.store.getState().props}
  //  visibilityFilter={this.store.getState().visibilityFilter} />
  ReactDOM.render(React.createElement(TodoApp, store.getState()), document.getElementById('root'));
};

// Call render every time the store has an action dispatched
store.subscribe(render);

// Call render once for initial display
render();
</script>


<script id="jsbin-source-javascript" type="text/javascript">// 3rd level reducer.
// Here, `state` refers to a single todo object.
const todo = (state, action) => {
  console.log("todo reducer called");
  // Remember, no mutation.
  // Initial state is considered (or not, in the ADD_TODO case),
  // and used to construct a new state object, always.

  switch (action.type) {
    case 'ADD_TODO':
      console.log('todo ADD_TODO');
      return {
        id: action.id,
        text: action.text,
        completed: false
      };
    case 'TOGGLE_TODO':
      console.log('todo TOGGLE_TODO');
      // Bail out if the action is for a different todo than the one passed in.
      if (state.id !== action.id) {
        return state;
      }

      // ... below is ES7 "Object Rest Destructuring"
      // https://github.com/sebmarkbage/ecmascript-rest-spread/blob/master/Spread.md
      // Think of it as "and the rest", or "override these object properties"
      return {
        ...state,
        completed: !state.completed
      };
    default:
      return state;
  }
}

// 2nd level reducer
// Here, `state` refers to the array of todo objects
const todos = (state = [], action) => {
  console.log("todos reducer called");
  switch (action.type) {
    // Returns a new array of todos, containing the added todo as described by `action`.
    // The new todo is constructed by delegating to the `todo` reducer.
    case 'ADD_TODO':
      console.log('todos ADD_TODO');
      // ... below is ES6 "spread operator" (arrays only)
      return [
        ...state,
        todo(undefined, action)
      ];
    // Returns a new array of todos, with an individual todo's completed status
    // toggled as identified by `action.id`.
    // Must operate on entire list (seems wrong somehow).
    case 'TOGGLE_TODO':
      console.log('todos TOGGLE_TODO');
      return state.map(t =>
        todo(t, action)
      );
    default:
      return state;
  }
}

// 2nd level reducer
// Here, `state` refers to a simple configuration string (enum/atom)
// Remember, we are only returning the state we are concerned with
const visibilityFilter = (state = 'SHOW_ALL', action) => {
  console.log("visibilityFilter reducer called");
  switch (action.type) {
    case 'SET_VISIBILITY_FILTER':
      return action.filter;
    default:
      return state;
  }
}

// Top level reducer.
// combineReducers is not magic.
const { combineReducers } = Redux;
const todoApp = combineReducers({
  // n.b. following syntax is ES6 Object Initializer (shorthand property names)
  todos,              // todos: todos,
  visibilityFilter    // visibilityFilter: visibilityFilter
});

const { createStore } = Redux;
const store = createStore(todoApp);

const { Component } = React;

// This looks like just a function, not a React component. (Right?)
// No! This is a "stateless component". It gets `props` passed in.
// https://facebook.github.io/react/blog/2015/09/10/react-v0.14-rc1.html#stateless-function-components
// Notice the curlybraces in the parameter list. This is destructuring
// `props` (e.g. filter = props.filter, children = props.children)
const Link = ({
  active,
  children,
  onClick
}) => {
  if (active)
    return <span>{children}</span>;
  return (
    <a href='#'
       onClick={e => {
         e.preventDefault();
         onClick(filter);
       }}
    >
      {children}
    </a>
  );
};

// Container component. Provides data and behavior for presentational components.
// When it mounts, it subscribes to store changes, allowing it to independently
// re-render. It delegates presnetation to the Link component.
class FilterLink extends Component {
  componentDidMount() {
    // n.b. Reads current state, but not subscribed.
    // If parent component does not update when store is updated, will render stale value.
    // Currently we re-render entire application when any state changes, but this is not efficient.
    // We will instead move store subscription to the lifecycle methods of container copmonents.
    // React provies a special forceUpdate method on component instances to force their rerendering.
    this.unsubscribe = store.subscribe(() => {
      this.forceUpdate();
    });

  }

  componentWillUnmount() {
    this.unsubscribe();
  }

  render() {
    const props = this.props;
    const state = store.getState();

    return (
      <Link
        active={
          props.filter === state.visibilityFilter
        }
        onClick={() => {
          store.dispatch({
            type: 'SET_VISIBILITY_FILTER',
            filter: props.filter
          });
        }}
      >
        {props.children}
      </Link>
    );
  }
}

const AddTodo = ({
  onAddClick
}) => {
  let input;

  return (
    <div>
      <input ref={node => {
        // This is a newer 0.14 syntax where ref can be a callback.

        // n.b. no `this` available in a functional/stateless component.
        // Here, we're making a closure over `input`.
        input = node;
      }} />
      <button onClick={() => {
        onAddClick(input.value);
        input.value = '';
      }}>
        Add todo
      </button>
    </div>
  );
}

const Footer = () => {
  return (
    <p>
      Show:
      {' '}
      <FilterLink
        filter='SHOW_ALL'>All</FilterLink>
      {' '}
      <FilterLink
        filter='SHOW_ACTIVE'>Active</FilterLink>
      {' '}
      <FilterLink
        filter='SHOW_COMPLETED'>Completed</FilterLink>
    </p>
  );
}

const getVisibleTodos = (todos, filter) => {
  console.log(`getVisibleTodos: todos=${todos} filter=${filter}`);
  switch (filter) {
    case 'SHOW_ALL':
      return todos;
    case 'SHOW_COMPLETED':
      return todos.filter(t => t.completed);
    case 'SHOW_ACTIVE':
      return todos.filter(t => !t.completed);
  }
}

let nextToDoId = 0; // global :shrug:

const TodoApp = ({
  todos,
  visibilityFilter
}) => {
  return (
    <div>
      <AddTodo
        onAddClick={(text) => {
          store.dispatch({
            type: 'ADD_TODO',
            id: nextToDoId++,
            text
          });
        }}
      />
      <TodoList
        todos={getVisibleTodos(todos, visibilityFilter)}
        onTodoClick={(id) => {
          store.dispatch({
            type: 'TOGGLE_TODO',
            id
          });
        }}
      />
      <Footer />
    </div>
  );
};

const Todo = ({
  onClick,
  completed,
  text
}) => {
  return (
    <li
      onClick={onClick}
      style={{textDecoration:
        completed ?
          'line-through' :
          'none'
      }}
    >
      {text}
    </li>
  );
};

const TodoList = ({
  todos,
  onTodoClick
}) => (
  <ul>
    {todos.map(todo =>
      <Todo
        key={todo.id}
        {...todo}
        onClick={() => onTodoClick(todo.id)}
      />
    )}
  </ul>
);

const render = () => {
  console.log('render called');
  // JSX Spread Attributes. https://facebook.github.io/react/docs/jsx-spread.html
  // <TodoApp {...store.getState()} />
  //    is equivalent to:
  // <ToDoApp
  //  todos={this.store.getState().props}
  //  visibilityFilter={this.store.getState().visibilityFilter} />
  ReactDOM.render(
    <TodoApp
      {...store.getState()}
    />,
    document.getElementById('root')
  );
};

// Call render every time the store has an action dispatched
store.subscribe(render);

// Call render once for initial display
render();</script></body>
</html>

## jsbin.wuwezo.js
// 3rd level reducer.
// Here, `state` refers to a single todo object.
'use strict';

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var todo = function todo(state, action) {
  console.log("todo reducer called");
  // Remember, no mutation.
  // Initial state is considered (or not, in the ADD_TODO case),
  // and used to construct a new state object, always.

  switch (action.type) {
    case 'ADD_TODO':
      console.log('todo ADD_TODO');
      return {
        id: action.id,
        text: action.text,
        completed: false
      };
    case 'TOGGLE_TODO':
      console.log('todo TOGGLE_TODO');
      // Bail out if the action is for a different todo than the one passed in.
      if (state.id !== action.id) {
        return state;
      }

      // ... below is ES7 "Object Rest Destructuring"
      // https://github.com/sebmarkbage/ecmascript-rest-spread/blob/master/Spread.md
      // Think of it as "and the rest", or "override these object properties"
      return _extends({}, state, {
        completed: !state.completed
      });
    default:
      return state;
  }
};

// 2nd level reducer
// Here, `state` refers to the array of todo objects
var todos = function todos(state, action) {
  if (state === undefined) state = [];

  console.log("todos reducer called");
  switch (action.type) {
    // Returns a new array of todos, containing the added todo as described by `action`.
    // The new todo is constructed by delegating to the `todo` reducer.
    case 'ADD_TODO':
      console.log('todos ADD_TODO');
      // ... below is ES6 "spread operator" (arrays only)
      return [].concat(_toConsumableArray(state), [todo(undefined, action)]);
    // Returns a new array of todos, with an individual todo's completed status
    // toggled as identified by `action.id`.
    // Must operate on entire list (seems wrong somehow).
    case 'TOGGLE_TODO':
      console.log('todos TOGGLE_TODO');
      return state.map(function (t) {
        return todo(t, action);
      });
    default:
      return state;
  }
};

// 2nd level reducer
// Here, `state` refers to a simple configuration string (enum/atom)
// Remember, we are only returning the state we are concerned with
var visibilityFilter = function visibilityFilter(state, action) {
  if (state === undefined) state = 'SHOW_ALL';

  console.log("visibilityFilter reducer called");
  switch (action.type) {
    case 'SET_VISIBILITY_FILTER':
      return action.filter;
    default:
      return state;
  }
};

// Top level reducer.
// combineReducers is not magic.
var _Redux = Redux;
var combineReducers = _Redux.combineReducers;

var todoApp = combineReducers({
  // n.b. following syntax is ES6 Object Initializer (shorthand property names)
  todos: todos, // todos: todos,
  visibilityFilter: visibilityFilter // visibilityFilter: visibilityFilter
});

var _Redux2 = Redux;
var createStore = _Redux2.createStore;

var store = createStore(todoApp);

var _React = React;
var Component = _React.Component;

// This looks like just a function, not a React component. (Right?)
// No! This is a "stateless component". It gets `props` passed in.
// https://facebook.github.io/react/blog/2015/09/10/react-v0.14-rc1.html#stateless-function-components
// Notice the curlybraces in the parameter list. This is destructuring
// `props` (e.g. filter = props.filter, children = props.children)
var Link = function Link(_ref) {
  var active = _ref.active;
  var children = _ref.children;
  var onClick = _ref.onClick;

  if (active) return React.createElement(
    'span',
    null,
    children
  );
  return React.createElement(
    'a',
    { href: '#',
      onClick: function (e) {
        e.preventDefault();
        onClick(filter);
      }
    },
    children
  );
};

// Container component. Provides data and behavior for presentational components.
// When it mounts, it subscribes to store changes, allowing it to independently
// re-render. It delegates presnetation to the Link component.

var FilterLink = (function (_Component) {
  _inherits(FilterLink, _Component);

  function FilterLink() {
    _classCallCheck(this, FilterLink);

    _get(Object.getPrototypeOf(FilterLink.prototype), 'constructor', this).apply(this, arguments);
  }

  _createClass(FilterLink, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      var _this = this;

      // n.b. Reads current state, but not subscribed.
      // If parent component does not update when store is updated, will render stale value.
      // Currently we re-render entire application when any state changes, but this is not efficient.
      // We will instead move store subscription to the lifecycle methods of container copmonents.
      // React provies a special forceUpdate method on component instances to force their rerendering.
      this.unsubscribe = store.subscribe(function () {
        _this.forceUpdate();
      });
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      this.unsubscribe();
    }
  }, {
    key: 'render',
    value: function render() {
      var props = this.props;
      var state = store.getState();

      return React.createElement(
        Link,
        {
          active: props.filter === state.visibilityFilter,
          onClick: function () {
            store.dispatch({
              type: 'SET_VISIBILITY_FILTER',
              filter: props.filter
            });
          }
        },
        props.children
      );
    }
  }]);

  return FilterLink;
})(Component);

var AddTodo = function AddTodo(_ref2) {
  var onAddClick = _ref2.onAddClick;

  var input = undefined;

  return React.createElement(
    'div',
    null,
    React.createElement('input', { ref: function (node) {
        // This is a newer 0.14 syntax where ref can be a callback.

        // n.b. no `this` available in a functional/stateless component.
        // Here, we're making a closure over `input`.
        input = node;
      } }),
    React.createElement(
      'button',
      { onClick: function () {
          onAddClick(input.value);
          input.value = '';
        } },
      'Add todo'
    )
  );
};

var Footer = function Footer() {
  return React.createElement(
    'p',
    null,
    'Show:',
    ' ',
    React.createElement(
      FilterLink,
      {
        filter: 'SHOW_ALL' },
      'All'
    ),
    ' ',
    React.createElement(
      FilterLink,
      {
        filter: 'SHOW_ACTIVE' },
      'Active'
    ),
    ' ',
    React.createElement(
      FilterLink,
      {
        filter: 'SHOW_COMPLETED' },
      'Completed'
    )
  );
};

var getVisibleTodos = function getVisibleTodos(todos, filter) {
  console.log('getVisibleTodos: todos=' + todos + ' filter=' + filter);
  switch (filter) {
    case 'SHOW_ALL':
      return todos;
    case 'SHOW_COMPLETED':
      return todos.filter(function (t) {
        return t.completed;
      });
    case 'SHOW_ACTIVE':
      return todos.filter(function (t) {
        return !t.completed;
      });
  }
};

var nextToDoId = 0; // global :shrug:

var TodoApp = function TodoApp(_ref3) {
  var todos = _ref3.todos;
  var visibilityFilter = _ref3.visibilityFilter;

  return React.createElement(
    'div',
    null,
    React.createElement(AddTodo, {
      onAddClick: function (text) {
        store.dispatch({
          type: 'ADD_TODO',
          id: nextToDoId++,
          text: text
        });
      }
    }),
    React.createElement(TodoList, {
      todos: getVisibleTodos(todos, visibilityFilter),
      onTodoClick: function (id) {
        store.dispatch({
          type: 'TOGGLE_TODO',
          id: id
        });
      }
    }),
    React.createElement(Footer, null)
  );
};

var Todo = function Todo(_ref4) {
  var onClick = _ref4.onClick;
  var completed = _ref4.completed;
  var text = _ref4.text;

  return React.createElement(
    'li',
    {
      onClick: onClick,
      style: { textDecoration: completed ? 'line-through' : 'none'
      }
    },
    text
  );
};

var TodoList = function TodoList(_ref5) {
  var todos = _ref5.todos;
  var onTodoClick = _ref5.onTodoClick;
  return React.createElement(
    'ul',
    null,
    todos.map(function (todo) {
      return React.createElement(Todo, _extends({
        key: todo.id
      }, todo, {
        onClick: function () {
          return onTodoClick(todo.id);
        }
      }));
    })
  );
};

var render = function render() {
  console.log('render called');
  // JSX Spread Attributes. https://facebook.github.io/react/docs/jsx-spread.html
  // <TodoApp {...store.getState()} />
  //    is equivalent to:
  // <ToDoApp
  //  todos={this.store.getState().props}
  //  visibilityFilter={this.store.getState().visibilityFilter} />
  ReactDOM.render(React.createElement(TodoApp, store.getState()), document.getElementById('root'));
};

// Call render every time the store has an action dispatched
store.subscribe(render);

// Call render once for initial display
render();
	<!DOCTYPE html>
	<html>
	<head>
	<script src="https://fb.me/react-0.14.3.min.js"></script>
	<script src="https://fb.me/react-dom-0.14.3.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/redux/3.0.4/redux.min.js"></script>
	<meta charset="utf-8">
	<title>JS Bin</title>
	</head>
	<body>
	<div id="root"></div>
	<script id="jsbin-javascript">
	// 3rd level reducer.
	// Here, `state` refers to a single todo object.
	'use strict';

	var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable \|\| false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

	var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };

	var _extends = Object.assign \|\| function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

	function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } }

	function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

	function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

	var todo = function todo(state, action) {
	console.log("todo reducer called");
	// Remember, no mutation.
	// Initial state is considered (or not, in the ADD_TODO case),
	// and used to construct a new state object, always.

	switch (action.type) {
	case 'ADD_TODO':
	console.log('todo ADD_TODO');
	return {
	id: action.id,
	text: action.text,
	completed: false
	};
	case 'TOGGLE_TODO':
	console.log('todo TOGGLE_TODO');
	// Bail out if the action is for a different todo than the one passed in.
	if (state.id !== action.id) {
	return state;
	}

	// ... below is ES7 "Object Rest Destructuring"
	// https://github.com/sebmarkbage/ecmascript-rest-spread/blob/master/Spread.md
	// Think of it as "and the rest", or "override these object properties"
	return _extends({}, state, {
	completed: !state.completed
	});
	default:
	return state;
	}
	};

	// 2nd level reducer
	// Here, `state` refers to the array of todo objects
	var todos = function todos(state, action) {
	if (state === undefined) state = [];

	console.log("todos reducer called");
	switch (action.type) {
	// Returns a new array of todos, containing the added todo as described by `action`.
	// The new todo is constructed by delegating to the `todo` reducer.
	case 'ADD_TODO':
	console.log('todos ADD_TODO');
	// ... below is ES6 "spread operator" (arrays only)
	return [].concat(_toConsumableArray(state), [todo(undefined, action)]);
	// Returns a new array of todos, with an individual todo's completed status
	// toggled as identified by `action.id`.
	// Must operate on entire list (seems wrong somehow).
	case 'TOGGLE_TODO':
	console.log('todos TOGGLE_TODO');
	return state.map(function (t) {
	return todo(t, action);
	});
	default:
	return state;
	}
	};

	// 2nd level reducer
	// Here, `state` refers to a simple configuration string (enum/atom)
	// Remember, we are only returning the state we are concerned with
	var visibilityFilter = function visibilityFilter(state, action) {
	if (state === undefined) state = 'SHOW_ALL';

	console.log("visibilityFilter reducer called");
	switch (action.type) {
	case 'SET_VISIBILITY_FILTER':
	return action.filter;
	default:
	return state;
	}
	};

	// Top level reducer.
	// combineReducers is not magic.
	var _Redux = Redux;
	var combineReducers = _Redux.combineReducers;

	var todoApp = combineReducers({
	// n.b. following syntax is ES6 Object Initializer (shorthand property names)
	todos: todos, // todos: todos,
	visibilityFilter: visibilityFilter // visibilityFilter: visibilityFilter
	});

	var _Redux2 = Redux;
	var createStore = _Redux2.createStore;

	var store = createStore(todoApp);

	var _React = React;
	var Component = _React.Component;

	// This looks like just a function, not a React component. (Right?)
	// No! This is a "stateless component". It gets `props` passed in.
	// https://facebook.github.io/react/blog/2015/09/10/react-v0.14-rc1.html#stateless-function-components
	// Notice the curlybraces in the parameter list. This is destructuring
	// `props` (e.g. filter = props.filter, children = props.children)
	var Link = function Link(_ref) {
	var active = _ref.active;
	var children = _ref.children;
	var onClick = _ref.onClick;

	if (active) return React.createElement(
	'span',
	null,
	children
	);
	return React.createElement(
	'a',
	{ href: '#',
	onClick: function (e) {
	e.preventDefault();
	onClick(filter);
	}
	},
	children
	);
	};

	// Container component. Provides data and behavior for presentational components.
	// When it mounts, it subscribes to store changes, allowing it to independently
	// re-render. It delegates presnetation to the Link component.

	var FilterLink = (function (_Component) {
	_inherits(FilterLink, _Component);

	function FilterLink() {
	_classCallCheck(this, FilterLink);

	_get(Object.getPrototypeOf(FilterLink.prototype), 'constructor', this).apply(this, arguments);
	}

	_createClass(FilterLink, [{
	key: 'componentDidMount',
	value: function componentDidMount() {
	var _this = this;

	// n.b. Reads current state, but not subscribed.
	// If parent component does not update when store is updated, will render stale value.
	// Currently we re-render entire application when any state changes, but this is not efficient.
	// We will instead move store subscription to the lifecycle methods of container copmonents.
	// React provies a special forceUpdate method on component instances to force their rerendering.
	this.unsubscribe = store.subscribe(function () {
	_this.forceUpdate();
	});
	}
	}, {
	key: 'componentWillUnmount',
	value: function componentWillUnmount() {
	this.unsubscribe();
	}
	}, {
	key: 'render',
	value: function render() {
	var props = this.props;
	var state = store.getState();

	return React.createElement(
	Link,
	{
	active: props.filter === state.visibilityFilter,
	onClick: function () {
	store.dispatch({
	type: 'SET_VISIBILITY_FILTER',
	filter: props.filter
	});
	}
	},
	props.children
	);
	}
	}]);

	return FilterLink;
	})(Component);

	var AddTodo = function AddTodo(_ref2) {
	var onAddClick = _ref2.onAddClick;

	var input = undefined;

	return React.createElement(
	'div',
	null,
	React.createElement('input', { ref: function (node) {
	// This is a newer 0.14 syntax where ref can be a callback.

	// n.b. no `this` available in a functional/stateless component.
	// Here, we're making a closure over `input`.
	input = node;
	} }),
	React.createElement(
	'button',
	{ onClick: function () {
	onAddClick(input.value);
	input.value = '';
	} },
	'Add todo'
	)
	);
	};

	var Footer = function Footer() {
	return React.createElement(
	'p',
	null,
	'Show:',
	' ',
	React.createElement(
	FilterLink,
	{
	filter: 'SHOW_ALL' },
	'All'
	),
	' ',
	React.createElement(
	FilterLink,
	{
	filter: 'SHOW_ACTIVE' },
	'Active'
	),
	' ',
	React.createElement(
	FilterLink,
	{
	filter: 'SHOW_COMPLETED' },
	'Completed'
	)
	);
	};

	var getVisibleTodos = function getVisibleTodos(todos, filter) {
	console.log('getVisibleTodos: todos=' + todos + ' filter=' + filter);
	switch (filter) {
	case 'SHOW_ALL':
	return todos;
	case 'SHOW_COMPLETED':
	return todos.filter(function (t) {
	return t.completed;
	});
	case 'SHOW_ACTIVE':
	return todos.filter(function (t) {
	return !t.completed;
	});
	}
	};

	var nextToDoId = 0; // global :shrug:

	var TodoApp = function TodoApp(_ref3) {
	var todos = _ref3.todos;
	var visibilityFilter = _ref3.visibilityFilter;

	return React.createElement(
	'div',
	null,
	React.createElement(AddTodo, {
	onAddClick: function (text) {
	store.dispatch({
	type: 'ADD_TODO',
	id: nextToDoId++,
	text: text
	});
	}
	}),
	React.createElement(TodoList, {
	todos: getVisibleTodos(todos, visibilityFilter),
	onTodoClick: function (id) {
	store.dispatch({
	type: 'TOGGLE_TODO',
	id: id
	});
	}
	}),
	React.createElement(Footer, null)
	);
	};

	var Todo = function Todo(_ref4) {
	var onClick = _ref4.onClick;
	var completed = _ref4.completed;
	var text = _ref4.text;

	return React.createElement(
	'li',
	{
	onClick: onClick,
	style: { textDecoration: completed ? 'line-through' : 'none'
	}
	},
	text
	);
	};

	var TodoList = function TodoList(_ref5) {
	var todos = _ref5.todos;
	var onTodoClick = _ref5.onTodoClick;
	return React.createElement(
	'ul',
	null,
	todos.map(function (todo) {
	return React.createElement(Todo, _extends({
	key: todo.id
	}, todo, {
	onClick: function () {
	return onTodoClick(todo.id);
	}
	}));
	})
	);
	};

	var render = function render() {
	console.log('render called');
	// JSX Spread Attributes. https://facebook.github.io/react/docs/jsx-spread.html
	// <TodoApp {...store.getState()} />
	// is equivalent to:
	// <ToDoApp
	// todos={this.store.getState().props}
	// visibilityFilter={this.store.getState().visibilityFilter} />
	ReactDOM.render(React.createElement(TodoApp, store.getState()), document.getElementById('root'));
	};

	// Call render every time the store has an action dispatched
	store.subscribe(render);

	// Call render once for initial display
	render();
	</script>



	<script id="jsbin-source-javascript" type="text/javascript">// 3rd level reducer.
	// Here, `state` refers to a single todo object.
	const todo = (state, action) => {
	console.log("todo reducer called");
	// Remember, no mutation.
	// Initial state is considered (or not, in the ADD_TODO case),
	// and used to construct a new state object, always.

	switch (action.type) {
	case 'ADD_TODO':
	console.log('todo ADD_TODO');
	return {
	id: action.id,
	text: action.text,
	completed: false
	};
	case 'TOGGLE_TODO':
	console.log('todo TOGGLE_TODO');
	// Bail out if the action is for a different todo than the one passed in.
	if (state.id !== action.id) {
	return state;
	}

	// ... below is ES7 "Object Rest Destructuring"
	// https://github.com/sebmarkbage/ecmascript-rest-spread/blob/master/Spread.md
	// Think of it as "and the rest", or "override these object properties"
	return {
	...state,
	completed: !state.completed
	};
	default:
	return state;
	}
	}

	// 2nd level reducer
	// Here, `state` refers to the array of todo objects
	const todos = (state = [], action) => {
	console.log("todos reducer called");
	switch (action.type) {
	// Returns a new array of todos, containing the added todo as described by `action`.
	// The new todo is constructed by delegating to the `todo` reducer.
	case 'ADD_TODO':
	console.log('todos ADD_TODO');
	// ... below is ES6 "spread operator" (arrays only)
	return [
	...state,
	todo(undefined, action)
	];
	// Returns a new array of todos, with an individual todo's completed status
	// toggled as identified by `action.id`.
	// Must operate on entire list (seems wrong somehow).
	case 'TOGGLE_TODO':
	console.log('todos TOGGLE_TODO');
	return state.map(t =>
	todo(t, action)
	);
	default:
	return state;
	}
	}

	// 2nd level reducer
	// Here, `state` refers to a simple configuration string (enum/atom)
	// Remember, we are only returning the state we are concerned with
	const visibilityFilter = (state = 'SHOW_ALL', action) => {
	console.log("visibilityFilter reducer called");
	switch (action.type) {
	case 'SET_VISIBILITY_FILTER':
	return action.filter;
	default:
	return state;
	}
	}

	// Top level reducer.
	// combineReducers is not magic.
	const { combineReducers } = Redux;
	const todoApp = combineReducers({
	// n.b. following syntax is ES6 Object Initializer (shorthand property names)
	todos, // todos: todos,
	visibilityFilter // visibilityFilter: visibilityFilter
	});

	const { createStore } = Redux;
	const store = createStore(todoApp);

	const { Component } = React;

	// This looks like just a function, not a React component. (Right?)
	// No! This is a "stateless component". It gets `props` passed in.
	// https://facebook.github.io/react/blog/2015/09/10/react-v0.14-rc1.html#stateless-function-components
	// Notice the curlybraces in the parameter list. This is destructuring
	// `props` (e.g. filter = props.filter, children = props.children)
	const Link = ({
	active,
	children,
	onClick
	}) => {
	if (active)
	return <span>{children}</span>;
	return (
	<a href='#'
	onClick={e => {
	e.preventDefault();
	onClick(filter);
	}}
	>
	{children}
	</a>
	);
	};

	// Container component. Provides data and behavior for presentational components.
	// When it mounts, it subscribes to store changes, allowing it to independently
	// re-render. It delegates presnetation to the Link component.
	class FilterLink extends Component {
	componentDidMount() {
	// n.b. Reads current state, but not subscribed.
	// If parent component does not update when store is updated, will render stale value.
	// Currently we re-render entire application when any state changes, but this is not efficient.
	// We will instead move store subscription to the lifecycle methods of container copmonents.
	// React provies a special forceUpdate method on component instances to force their rerendering.
	this.unsubscribe = store.subscribe(() => {
	this.forceUpdate();
	});

	}

	componentWillUnmount() {
	this.unsubscribe();
	}

	render() {
	const props = this.props;
	const state = store.getState();

	return (
	<Link
	active={
	props.filter === state.visibilityFilter
	}
	onClick={() => {
	store.dispatch({
	type: 'SET_VISIBILITY_FILTER',
	filter: props.filter
	});
	}}
	>
	{props.children}
	</Link>
	);
	}
	}

	const AddTodo = ({
	onAddClick
	}) => {
	let input;

	return (
	<div>
	<input ref={node => {
	// This is a newer 0.14 syntax where ref can be a callback.

	// n.b. no `this` available in a functional/stateless component.
	// Here, we're making a closure over `input`.
	input = node;
	}} />
	<button onClick={() => {
	onAddClick(input.value);
	input.value = '';
	}}>
	Add todo
	</button>
	</div>
	);
	}

	const Footer = () => {
	return (
	<p>
	Show:
	{' '}
	<FilterLink
	filter='SHOW_ALL'>All</FilterLink>
	{' '}
	<FilterLink
	filter='SHOW_ACTIVE'>Active</FilterLink>
	{' '}
	<FilterLink
	filter='SHOW_COMPLETED'>Completed</FilterLink>
	</p>
	);
	}

	const getVisibleTodos = (todos, filter) => {
	console.log(`getVisibleTodos: todos=${todos} filter=${filter}`);
	switch (filter) {
	case 'SHOW_ALL':
	return todos;
	case 'SHOW_COMPLETED':
	return todos.filter(t => t.completed);
	case 'SHOW_ACTIVE':
	return todos.filter(t => !t.completed);
	}
	}

	let nextToDoId = 0; // global :shrug:

	const TodoApp = ({
	todos,
	visibilityFilter
	}) => {
	return (
	<div>
	<AddTodo
	onAddClick={(text) => {
	store.dispatch({
	type: 'ADD_TODO',
	id: nextToDoId++,
	text
	});
	}}
	/>
	<TodoList
	todos={getVisibleTodos(todos, visibilityFilter)}
	onTodoClick={(id) => {
	store.dispatch({
	type: 'TOGGLE_TODO',
	id
	});
	}}
	/>
	<Footer />
	</div>
	);
	};

	const Todo = ({
	onClick,
	completed,
	text
	}) => {
	return (
	<li
	onClick={onClick}
	style={{textDecoration:
	completed ?
	'line-through' :
	'none'
	}}
	>
	{text}
	</li>
	);
	};

	const TodoList = ({
	todos,
	onTodoClick
	}) => (
	<ul>
	{todos.map(todo =>
	<Todo
	key={todo.id}
	{...todo}
	onClick={() => onTodoClick(todo.id)}
	/>
	)}
	</ul>
	);

	const render = () => {
	console.log('render called');
	// JSX Spread Attributes. https://facebook.github.io/react/docs/jsx-spread.html
	// <TodoApp {...store.getState()} />
	// is equivalent to:
	// <ToDoApp
	// todos={this.store.getState().props}
	// visibilityFilter={this.store.getState().visibilityFilter} />
	ReactDOM.render(
	<TodoApp
	{...store.getState()}
	/>,
	document.getElementById('root')
	);
	};

	// Call render every time the store has an action dispatched
	store.subscribe(render);

	// Call render once for initial display
	render();</script></body>
	</html>