packery.pkgd-1.0.6.js

/*!
 * Packery PACKAGED v1.0.6
 * bin-packing layout library
 * http://packery.metafizzy.co
 *
 * Commercial use requires one-time purchase of a commercial license
 * http://packery.metafizzy.co/license.html
 *
 * Copyright 2013 Metafizzy
 */

/*!
 * classie - class helper functions
 * from bonzo https://github.com/ded/bonzo
 * 
 * classie.has( elem, 'my-class' ) -> true/false
 * classie.add( elem, 'my-new-class' )
 * classie.remove( elem, 'my-unwanted-class' )
 * classie.toggle( elem, 'my-class' )
 */

/*jshint browser: true, strict: true, undef: true */
/*global define: false */

( function( window ) {

'use strict';

// class helper functions from bonzo https://github.com/ded/bonzo

function classReg( className ) {
  return new RegExp("(^|\\s+)" + className + "(\\s+|$)");
}

// classList support for class management
// altho to be fair, the api sucks because it won't accept multiple classes at once
var hasClass, addClass, removeClass;

if ( 'classList' in document.documentElement ) {
  hasClass = function( elem, c ) {
    return elem.classList.contains( c );
  };
  addClass = function( elem, c ) {
    elem.classList.add( c );
  };
  removeClass = function( elem, c ) {
    elem.classList.remove( c );
  };
}
else {
  hasClass = function( elem, c ) {
    return classReg( c ).test( elem.className );
  };
  addClass = function( elem, c ) {
    if ( !hasClass( elem, c ) ) {
      elem.className = elem.className + ' ' + c;
    }
  };
  removeClass = function( elem, c ) {
    elem.className = elem.className.replace( classReg( c ), ' ' );
  };
}

function toggleClass( elem, c ) {
  var fn = hasClass( elem, c ) ? removeClass : addClass;
  fn( elem, c );
}

var classie = {
  // full names
  hasClass: hasClass,
  addClass: addClass,
  removeClass: removeClass,
  toggleClass: toggleClass,
  // short names
  has: hasClass,
  add: addClass,
  remove: removeClass,
  toggle: toggleClass
};

// transport
if ( typeof define === 'function' && define.amd ) {
  // AMD
  define( classie );
} else {
  // browser global
  window.classie = classie;
}

})( window );


/*!
 * getStyleProperty by kangax
 * http://perfectionkills.com/feature-testing-css-properties/
 */

/*jshint browser: true, strict: true, undef: true */
/*globals define: false */

( function( window ) {

'use strict';

var prefixes = 'Webkit Moz ms Ms O'.split(' ');
var docElemStyle = document.documentElement.style;

function getStyleProperty( propName ) {
  if ( !propName ) {
    return;
  }

  // test standard property first
  if ( typeof docElemStyle[ propName ] === 'string' ) {
    return propName;
  }

  // capitalize
  propName = propName.charAt(0).toUpperCase() + propName.slice(1);

  // test vendor specific properties
  var prefixed;
  for ( var i=0, len = prefixes.length; i < len; i++ ) {
    prefixed = prefixes[i] + propName;
    if ( typeof docElemStyle[ prefixed ] === 'string' ) {
      return prefixed;
    }
  }
}

// transport
if ( typeof define === 'function' && define.amd ) {
  // AMD
  define( function() {
    return getStyleProperty;
  });
} else {
  // browser global
  window.getStyleProperty = getStyleProperty;
}

})( window );

/**
 * getSize v1.1.4
 * measure size of elements
 */

/*jshint browser: true, strict: true, undef: true, unused: true */
/*global define: false */

( function( window, undefined ) {

'use strict';

// -------------------------- helpers -------------------------- //

var defView = document.defaultView;

var getStyle = defView && defView.getComputedStyle ?
  function( elem ) {
    return defView.getComputedStyle( elem, null );
  } :
  function( elem ) {
    return elem.currentStyle;
  };

// get a number from a string, not a percentage
function getStyleSize( value ) {
  var num = parseFloat( value );
  // not a percent like '100%', and a number
  var isValid = value.indexOf('%') === -1 && !isNaN( num );
  return isValid && num;
}

// -------------------------- measurements -------------------------- //

var measurements = [
  'paddingLeft',
  'paddingRight',
  'paddingTop',
  'paddingBottom',
  'marginLeft',
  'marginRight',
  'marginTop',
  'marginBottom',
  'borderLeftWidth',
  'borderRightWidth',
  'borderTopWidth',
  'borderBottomWidth'
];

function getZeroSize() {
  var size = {
    width: 0,
    height: 0,
    innerWidth: 0,
    innerHeight: 0,
    outerWidth: 0,
    outerHeight: 0
  };
  for ( var i=0, len = measurements.length; i < len; i++ ) {
    var measurement = measurements[i];
    size[ measurement ] = 0;
  }
  return size;
}



function defineGetSize( getStyleProperty ) {

// -------------------------- box sizing -------------------------- //

var boxSizingProp = getStyleProperty('boxSizing');
var isBoxSizeOuter;

/**
 * WebKit measures the outer-width on style.width on border-box elems
 * IE & Firefox measures the inner-width
 */
( function() {
  if ( !boxSizingProp ) {
    return;
  }

  var div = document.createElement('div');
  div.style.width = '200px';
  div.style.padding = '1px 2px 3px 4px';
  div.style.borderStyle = 'solid';
  div.style.borderWidth = '1px 2px 3px 4px';
  div.style[ boxSizingProp ] = 'border-box';

  var body = document.body || document.documentElement;
  body.appendChild( div );
  var style = getStyle( div );

  isBoxSizeOuter = getStyleSize( style.width ) === 200;
  body.removeChild( div );
})();


// -------------------------- getSize -------------------------- //

function getSize( elem ) {
  // use querySeletor if elem is string
  if ( typeof elem === 'string' ) {
    elem = document.querySelector( elem );
  }

  // do not proceed on non-objects
  if ( !elem || typeof elem !== 'object' || !elem.nodeType ) {
    return;
  }

  var style = getStyle( elem );

  // if hidden, everything is 0
  if ( style.display === 'none' ) {
    return getZeroSize();
  }

  var size = {};
  size.width = elem.offsetWidth;
  size.height = elem.offsetHeight;

  var isBorderBox = size.isBorderBox = !!( boxSizingProp &&
    style[ boxSizingProp ] && style[ boxSizingProp ] === 'border-box' );

  // get all measurements
  for ( var i=0, len = measurements.length; i < len; i++ ) {
    var measurement = measurements[i];
    var value = style[ measurement ];
    var num = parseFloat( value );
    // any 'auto', 'medium' value will be 0
    size[ measurement ] = !isNaN( num ) ? num : 0;
  }

  var paddingWidth = size.paddingLeft + size.paddingRight;
  var paddingHeight = size.paddingTop + size.paddingBottom;
  var marginWidth = size.marginLeft + size.marginRight;
  var marginHeight = size.marginTop + size.marginBottom;
  var borderWidth = size.borderLeftWidth + size.borderRightWidth;
  var borderHeight = size.borderTopWidth + size.borderBottomWidth;

  var isBorderBoxSizeOuter = isBorderBox && isBoxSizeOuter;

  // overwrite width and height if we can get it from style
  var styleWidth = getStyleSize( style.width );
  if ( styleWidth !== false ) {
    size.width = styleWidth +
      // add padding and border unless it's already including it
      ( isBorderBoxSizeOuter ? 0 : paddingWidth + borderWidth );
  }

  var styleHeight = getStyleSize( style.height );
  if ( styleHeight !== false ) {
    size.height = styleHeight +
      // add padding and border unless it's already including it
      ( isBorderBoxSizeOuter ? 0 : paddingHeight + borderHeight );
  }

  size.innerWidth = size.width - ( paddingWidth + borderWidth );
  size.innerHeight = size.height - ( paddingHeight + borderHeight );

  size.outerWidth = size.width + marginWidth;
  size.outerHeight = size.height + marginHeight;

  return size;
}

return getSize;

}

// transport
if ( typeof define === 'function' && define.amd ) {
  // AMD
  define( [ 'get-style-property/get-style-property' ], defineGetSize );
} else {
  // browser global
  window.getSize = defineGetSize( window.getStyleProperty );
}

})( window );

/*!
 * eventie v1.0.3
 * event binding helper
 *   eventie.bind( elem, 'click', myFn )
 *   eventie.unbind( elem, 'click', myFn )
 */

/*jshint browser: true, undef: true, unused: true */
/*global define: false */

( function( window ) {

'use strict';

var docElem = document.documentElement;

var bind = function() {};

if ( docElem.addEventListener ) {
  bind = function( obj, type, fn ) {
    obj.addEventListener( type, fn, false );
  };
} else if ( docElem.attachEvent ) {
  bind = function( obj, type, fn ) {
    obj[ type + fn ] = fn.handleEvent ?
      function() {
        var event = window.event;
        // add event.target
        event.target = event.target || event.srcElement;
        fn.handleEvent.call( fn, event );
      } :
      function() {
        var event = window.event;
        // add event.target
        event.target = event.target || event.srcElement;
        fn.call( obj, event );
      };
    obj.attachEvent( "on" + type, obj[ type + fn ] );
  };
}

var unbind = function() {};

if ( docElem.removeEventListener ) {
  unbind = function( obj, type, fn ) {
    obj.removeEventListener( type, fn, false );
  };
} else if ( docElem.detachEvent ) {
  unbind = function( obj, type, fn ) {
    obj.detachEvent( "on" + type, obj[ type + fn ] );
    try {
      delete obj[ type + fn ];
    } catch ( err ) {
      // can't delete window object properties
      obj[ type + fn ] = undefined;
    }
  };
}

var eventie = {
  bind: bind,
  unbind: unbind
};

// transport
if ( typeof define === 'function' && define.amd ) {
  // AMD
  define( eventie );
} else {
  // browser global
  window.eventie = eventie;
}

})( this );

/*!
 * docReady
 * Cross browser DOMContentLoaded event emitter
 */

/*jshint browser: true, strict: true, undef: true, unused: true*/
/*global define: false */

( function( window ) {

'use strict';

var document = window.document;
// collection of functions to be triggered on ready
var queue = [];

function docReady( fn ) {
  // throw out non-functions
  if ( typeof fn !== 'function' ) {
    return;
  }

  if ( docReady.isReady ) {
    // ready now, hit it
    fn();
  } else {
    // queue function when ready
    queue.push( fn );
  }
}

docReady.isReady = false;

// triggered on various doc ready events
function init( event ) {
  // bail if IE8 document is not ready just yet
  var isIE8NotReady = event.type === 'readystatechange' && document.readyState !== 'complete';
  if ( docReady.isReady || isIE8NotReady ) {
    return;
  }
  docReady.isReady = true;

  // process queue
  for ( var i=0, len = queue.length; i < len; i++ ) {
    var fn = queue[i];
    fn();
  }
}

function defineDocReady( eventie ) {
  eventie.bind( document, 'DOMContentLoaded', init );
  eventie.bind( document, 'readystatechange', init );
  eventie.bind( window, 'load', init );

  return docReady;
}

// transport
if ( typeof define === 'function' && define.amd ) {
  // AMD
  // if RequireJS, then doc is already ready
  docReady.isReady = typeof requirejs === 'function';
  define( [ 'eventie/eventie' ], defineDocReady );
} else {
  // browser global
  window.docReady = defineDocReady( window.eventie );
}

})( this );


/*!
 * EventEmitter v4.2.3 - git.io/ee
 * Oliver Caldwell
 * MIT license
 * @preserve
 */

(function () {
    'use strict';

	/**
	 * Class for managing events.
	 * Can be extended to provide event functionality in other classes.
	 *
	 * @class EventEmitter Manages event registering and emitting.
	 */
	function EventEmitter() {}

	// Shortcuts to improve speed and size

	// Easy access to the prototype
	var proto = EventEmitter.prototype;

	/**
	 * Finds the index of the listener for the event in it's storage array.
	 *
	 * @param {Function[]} listeners Array of listeners to search through.
	 * @param {Function} listener Method to look for.
	 * @return {Number} Index of the specified listener, -1 if not found
	 * @api private
	 */
	function indexOfListener(listeners, listener) {
		var i = listeners.length;
		while (i--) {
			if (listeners[i].listener === listener) {
				return i;
			}
		}

		return -1;
	}

	/**
	 * Alias a method while keeping the context correct, to allow for overwriting of target method.
	 *
	 * @param {String} name The name of the target method.
	 * @return {Function} The aliased method
	 * @api private
	 */
	function alias(name) {
		return function aliasClosure() {
			return this[name].apply(this, arguments);
		};
	}

	/**
	 * Returns the listener array for the specified event.
	 * Will initialise the event object and listener arrays if required.
	 * Will return an object if you use a regex search. The object contains keys for each matched event. So /ba[rz]/ might return an object containing bar and baz. But only if you have either defined them with defineEvent or added some listeners to them.
	 * Each property in the object response is an array of listener functions.
	 *
	 * @param {String|RegExp} evt Name of the event to return the listeners from.
	 * @return {Function[]|Object} All listener functions for the event.
	 */
	proto.getListeners = function getListeners(evt) {
		var events = this._getEvents();
		var response;
		var key;

		// Return a concatenated array of all matching events if
		// the selector is a regular expression.
		if (typeof evt === 'object') {
			response = {};
			for (key in events) {
				if (events.hasOwnProperty(key) && evt.test(key)) {
					response[key] = events[key];
				}
			}
		}
		else {
			response = events[evt] || (events[evt] = []);
		}

		return response;
	};

	/**
	 * Takes a list of listener objects and flattens it into a list of listener functions.
	 *
	 * @param {Object[]} listeners Raw listener objects.
	 * @return {Function[]} Just the listener functions.
	 */
	proto.flattenListeners = function flattenListeners(listeners) {
		var flatListeners = [];
		var i;

		for (i = 0; i < listeners.length; i += 1) {
			flatListeners.push(listeners[i].listener);
		}

		return flatListeners;
	};

	/**
	 * Fetches the requested listeners via getListeners but will always return the results inside an object. This is mainly for internal use but others may find it useful.
	 *
	 * @param {String|RegExp} evt Name of the event to return the listeners from.
	 * @return {Object} All listener functions for an event in an object.
	 */
	proto.getListenersAsObject = function getListenersAsObject(evt) {
		var listeners = this.getListeners(evt);
		var response;

		if (listeners instanceof Array) {
			response = {};
			response[evt] = listeners;
		}

		return response || listeners;
	};

	/**
	 * Adds a listener function to the specified event.
	 * The listener will not be added if it is a duplicate.
	 * If the listener returns true then it will be removed after it is called.
	 * If you pass a regular expression as the event name then the listener will be added to all events that match it.
	 *
	 * @param {String|RegExp} evt Name of the event to attach the listener to.
	 * @param {Function} listener Method to be called when the event is emitted. If the function returns true then it will be removed after calling.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.addListener = function addListener(evt, listener) {
		var listeners = this.getListenersAsObject(evt);
		var listenerIsWrapped = typeof listener === 'object';
		var key;

		for (key in listeners) {
			if (listeners.hasOwnProperty(key) && indexOfListener(listeners[key], listener) === -1) {
				listeners[key].push(listenerIsWrapped ? listener : {
					listener: listener,
					once: false
				});
			}
		}

		return this;
	};

	/**
	 * Alias of addListener
	 */
	proto.on = alias('addListener');

	/**
	 * Semi-alias of addListener. It will add a listener that will be
	 * automatically removed after it's first execution.
	 *
	 * @param {String|RegExp} evt Name of the event to attach the listener to.
	 * @param {Function} listener Method to be called when the event is emitted. If the function returns true then it will be removed after calling.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.addOnceListener = function addOnceListener(evt, listener) {
		return this.addListener(evt, {
			listener: listener,
			once: true
		});
	};

	/**
	 * Alias of addOnceListener.
	 */
	proto.once = alias('addOnceListener');

	/**
	 * Defines an event name. This is required if you want to use a regex to add a listener to multiple events at once. If you don't do this then how do you expect it to know what event to add to? Should it just add to every possible match for a regex? No. That is scary and bad.
	 * You need to tell it what event names should be matched by a regex.
	 *
	 * @param {String} evt Name of the event to create.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.defineEvent = function defineEvent(evt) {
		this.getListeners(evt);
		return this;
	};

	/**
	 * Uses defineEvent to define multiple events.
	 *
	 * @param {String[]} evts An array of event names to define.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.defineEvents = function defineEvents(evts) {
		for (var i = 0; i < evts.length; i += 1) {
			this.defineEvent(evts[i]);
		}
		return this;
	};

	/**
	 * Removes a listener function from the specified event.
	 * When passed a regular expression as the event name, it will remove the listener from all events that match it.
	 *
	 * @param {String|RegExp} evt Name of the event to remove the listener from.
	 * @param {Function} listener Method to remove from the event.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.removeListener = function removeListener(evt, listener) {
		var listeners = this.getListenersAsObject(evt);
		var index;
		var key;

		for (key in listeners) {
			if (listeners.hasOwnProperty(key)) {
				index = indexOfListener(listeners[key], listener);

				if (index !== -1) {
					listeners[key].splice(index, 1);
				}
			}
		}

		return this;
	};

	/**
	 * Alias of removeListener
	 */
	proto.off = alias('removeListener');

	/**
	 * Adds listeners in bulk using the manipulateListeners method.
	 * If you pass an object as the second argument you can add to multiple events at once. The object should contain key value pairs of events and listeners or listener arrays. You can also pass it an event name and an array of listeners to be added.
	 * You can also pass it a regular expression to add the array of listeners to all events that match it.
	 * Yeah, this function does quite a bit. That's probably a bad thing.
	 *
	 * @param {String|Object|RegExp} evt An event name if you will pass an array of listeners next. An object if you wish to add to multiple events at once.
	 * @param {Function[]} [listeners] An optional array of listener functions to add.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.addListeners = function addListeners(evt, listeners) {
		// Pass through to manipulateListeners
		return this.manipulateListeners(false, evt, listeners);
	};

	/**
	 * Removes listeners in bulk using the manipulateListeners method.
	 * If you pass an object as the second argument you can remove from multiple events at once. The object should contain key value pairs of events and listeners or listener arrays.
	 * You can also pass it an event name and an array of listeners to be removed.
	 * You can also pass it a regular expression to remove the listeners from all events that match it.
	 *
	 * @param {String|Object|RegExp} evt An event name if you will pass an array of listeners next. An object if you wish to remove from multiple events at once.
	 * @param {Function[]} [listeners] An optional array of listener functions to remove.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.removeListeners = function removeListeners(evt, listeners) {
		// Pass through to manipulateListeners
		return this.manipulateListeners(true, evt, listeners);
	};

	/**
	 * Edits listeners in bulk. The addListeners and removeListeners methods both use this to do their job. You should really use those instead, this is a little lower level.
	 * The first argument will determine if the listeners are removed (true) or added (false).
	 * If you pass an object as the second argument you can add/remove from multiple events at once. The object should contain key value pairs of events and listeners or listener arrays.
	 * You can also pass it an event name and an array of listeners to be added/removed.
	 * You can also pass it a regular expression to manipulate the listeners of all events that match it.
	 *
	 * @param {Boolean} remove True if you want to remove listeners, false if you want to add.
	 * @param {String|Object|RegExp} evt An event name if you will pass an array of listeners next. An object if you wish to add/remove from multiple events at once.
	 * @param {Function[]} [listeners] An optional array of listener functions to add/remove.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.manipulateListeners = function manipulateListeners(remove, evt, listeners) {
		var i;
		var value;
		var single = remove ? this.removeListener : this.addListener;
		var multiple = remove ? this.removeListeners : this.addListeners;

		// If evt is an object then pass each of it's properties to this method
		if (typeof evt === 'object' && !(evt instanceof RegExp)) {
			for (i in evt) {
				if (evt.hasOwnProperty(i) && (value = evt[i])) {
					// Pass the single listener straight through to the singular method
					if (typeof value === 'function') {
						single.call(this, i, value);
					}
					else {
						// Otherwise pass back to the multiple function
						multiple.call(this, i, value);
					}
				}
			}
		}
		else {
			// So evt must be a string
			// And listeners must be an array of listeners
			// Loop over it and pass each one to the multiple method
			i = listeners.length;
			while (i--) {
				single.call(this, evt, listeners[i]);
			}
		}

		return this;
	};

	/**
	 * Removes all listeners from a specified event.
	 * If you do not specify an event then all listeners will be removed.
	 * That means every event will be emptied.
	 * You can also pass a regex to remove all events that match it.
	 *
	 * @param {String|RegExp} [evt] Optional name of the event to remove all listeners for. Will remove from every event if not passed.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.removeEvent = function removeEvent(evt) {
		var type = typeof evt;
		var events = this._getEvents();
		var key;

		// Remove different things depending on the state of evt
		if (type === 'string') {
			// Remove all listeners for the specified event
			delete events[evt];
		}
		else if (type === 'object') {
			// Remove all events matching the regex.
			for (key in events) {
				if (events.hasOwnProperty(key) && evt.test(key)) {
					delete events[key];
				}
			}
		}
		else {
			// Remove all listeners in all events
			delete this._events;
		}

		return this;
	};

	/**
	 * Emits an event of your choice.
	 * When emitted, every listener attached to that event will be executed.
	 * If you pass the optional argument array then those arguments will be passed to every listener upon execution.
	 * Because it uses `apply`, your array of arguments will be passed as if you wrote them out separately.
	 * So they will not arrive within the array on the other side, they will be separate.
	 * You can also pass a regular expression to emit to all events that match it.
	 *
	 * @param {String|RegExp} evt Name of the event to emit and execute listeners for.
	 * @param {Array} [args] Optional array of arguments to be passed to each listener.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.emitEvent = function emitEvent(evt, args) {
		var listeners = this.getListenersAsObject(evt);
		var listener;
		var i;
		var key;
		var response;

		for (key in listeners) {
			if (listeners.hasOwnProperty(key)) {
				i = listeners[key].length;

				while (i--) {
					// If the listener returns true then it shall be removed from the event
					// The function is executed either with a basic call or an apply if there is an args array
					listener = listeners[key][i];

					if (listener.once === true) {
						this.removeListener(evt, listener.listener);
					}

					response = listener.listener.apply(this, args || []);

					if (response === this._getOnceReturnValue()) {
						this.removeListener(evt, listener.listener);
					}
				}
			}
		}

		return this;
	};

	/**
	 * Alias of emitEvent
	 */
	proto.trigger = alias('emitEvent');

	/**
	 * Subtly different from emitEvent in that it will pass its arguments on to the listeners, as opposed to taking a single array of arguments to pass on.
	 * As with emitEvent, you can pass a regex in place of the event name to emit to all events that match it.
	 *
	 * @param {String|RegExp} evt Name of the event to emit and execute listeners for.
	 * @param {...*} Optional additional arguments to be passed to each listener.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.emit = function emit(evt) {
		var args = Array.prototype.slice.call(arguments, 1);
		return this.emitEvent(evt, args);
	};

	/**
	 * Sets the current value to check against when executing listeners. If a
	 * listeners return value matches the one set here then it will be removed
	 * after execution. This value defaults to true.
	 *
	 * @param {*} value The new value to check for when executing listeners.
	 * @return {Object} Current instance of EventEmitter for chaining.
	 */
	proto.setOnceReturnValue = function setOnceReturnValue(value) {
		this._onceReturnValue = value;
		return this;
	};

	/**
	 * Fetches the current value to check against when executing listeners. If
	 * the listeners return value matches this one then it should be removed
	 * automatically. It will return true by default.
	 *
	 * @return {*|Boolean} The current value to check for or the default, true.
	 * @api private
	 */
	proto._getOnceReturnValue = function _getOnceReturnValue() {
		if (this.hasOwnProperty('_onceReturnValue')) {
			return this._onceReturnValue;
		}
		else {
			return true;
		}
	};

	/**
	 * Fetches the events object and creates one if required.
	 *
	 * @return {Object} The events storage object.
	 * @api private
	 */
	proto._getEvents = function _getEvents() {
		return this._events || (this._events = {});
	};

	// Expose the class either via AMD, CommonJS or the global object
	if (typeof define === 'function' && define.amd) {
		define(function () {
			return EventEmitter;
		});
	}
	else if (typeof module === 'object' && module.exports){
		module.exports = EventEmitter;
	}
	else {
		this.EventEmitter = EventEmitter;
	}
}.call(this));


/**
 * Bridget makes jQuery widgets
 * v1.0.0
 */

( function( window ) {

'use strict';

// -------------------------- utils -------------------------- //

var slice = Array.prototype.slice;

function noop() {}

// -------------------------- definition -------------------------- //

function defineBridget( $ ) {

// bail if no jQuery
if ( !$ ) {
  return;
}

// -------------------------- addOptionMethod -------------------------- //

/**
 * adds option method -> $().plugin('option', {...})
 * @param {Function} PluginClass - constructor class
 */
function addOptionMethod( PluginClass ) {
  // don't overwrite original option method
  if ( PluginClass.prototype.option ) {
    return;
  }

  // option setter
  PluginClass.prototype.option = function( opts ) {
    // bail out if not an object
    if ( !$.isPlainObject( opts ) ){
      return;
    }
    this.options = $.extend( true, this.options, opts );
  };
}


// -------------------------- plugin bridge -------------------------- //

// helper function for logging errors
// $.error breaks jQuery chaining
var logError = typeof console === 'undefined' ? noop :
  function( message ) {
    console.error( message );
  };

/**
 * jQuery plugin bridge, access methods like $elem.plugin('method')
 * @param {String} namespace - plugin name
 * @param {Function} PluginClass - constructor class
 */
function bridge( namespace, PluginClass ) {
  // add to jQuery fn namespace
  $.fn[ namespace ] = function( options ) {
    if ( typeof options === 'string' ) {
      // call plugin method when first argument is a string
      // get arguments for method
      var args = slice.call( arguments, 1 );

      for ( var i=0, len = this.length; i < len; i++ ) {
        var elem = this[i];
        var instance = $.data( elem, namespace );
        if ( !instance ) {
          logError( "cannot call methods on " + namespace + " prior to initialization; " +
            "attempted to call '" + options + "'" );
          continue;
        }
        if ( !$.isFunction( instance[options] ) || options.charAt(0) === '_' ) {
          logError( "no such method '" + options + "' for " + namespace + " instance" );
          continue;
        }

        // trigger method with arguments
        var returnValue = instance[ options ].apply( instance, args );

        // break look and return first value if provided
        if ( returnValue !== undefined ) {
          return returnValue;
        }
      }
      // return this if no return value
      return this;
    } else {
      return this.each( function() {
        var instance = $.data( this, namespace );
        if ( instance ) {
          // apply options & init
          instance.option( options );
          instance._init();
        } else {
          // initialize new instance
          instance = new PluginClass( this, options );
          $.data( this, namespace, instance );
        }
      });
    }
  };

}

// -------------------------- bridget -------------------------- //

/**
 * converts a Prototypical class into a proper jQuery plugin
 *   the class must have a ._init method
 * @param {String} namespace - plugin name, used in $().pluginName
 * @param {Function} PluginClass - constructor class
 */
$.bridget = function( namespace, PluginClass ) {
  addOptionMethod( PluginClass );
  bridge( namespace, PluginClass );
};

}

// transport
if ( typeof define === 'function' && define.amd ) {
  // AMD
  define( [ 'jquery' ], defineBridget );
} else {
  // get jquery from browser global
  defineBridget( window.jQuery );
}

})( window );


/**
 * matchesSelector helper v1.0.1
 *
 * @name matchesSelector
 *   @param {Element} elem
 *   @param {String} selector
 */

/*jshint browser: true, strict: true, undef: true, unused: true */
/*global define: false */

( function( global, ElemProto ) {

  'use strict';

  var matchesMethod = ( function() {
    // check un-prefixed
    if ( ElemProto.matchesSelector ) {
      return 'matchesSelector';
    }
    // check vendor prefixes
    var prefixes = [ 'webkit', 'moz', 'ms', 'o' ];

    for ( var i=0, len = prefixes.length; i < len; i++ ) {
      var prefix = prefixes[i];
      var method = prefix + 'MatchesSelector';
      if ( ElemProto[ method ] ) {
        return method;
      }
    }
  })();

  // ----- match ----- //

  function match( elem, selector ) {
    return elem[ matchesMethod ]( selector );
  }

  // ----- appendToFragment ----- //

  function checkParent( elem ) {
    // not needed if already has parent
    if ( elem.parentNode ) {
      return;
    }
    var fragment = document.createDocumentFragment();
    fragment.appendChild( elem );
  }

  // ----- query ----- //

  // fall back to using QSA
  // thx @jonathantneal https://gist.github.com/3062955
  function query( elem, selector ) {
    // append to fragment if no parent
    checkParent( elem );

    // match elem with all selected elems of parent
    var elems = elem.parentNode.querySelectorAll( selector );
    for ( var i=0, len = elems.length; i < len; i++ ) {
      // return true if match
      if ( elems[i] === elem ) {
        return true;
      }
    }
    // otherwise return false
    return false;
  }

  // ----- matchChild ----- //

  function matchChild( elem, selector ) {
    checkParent( elem );
    return match( elem, selector );
  }

  // ----- matchesSelector ----- //

  var matchesSelector;

  if ( matchesMethod ) {
    // IE9 supports matchesSelector, but doesn't work on orphaned elems
    // check for that
    var div = document.createElement('div');
    var supportsOrphans = match( div, 'div' );
    matchesSelector = supportsOrphans ? match : matchChild;
  } else {
    matchesSelector = query;
  }

  // transport
  if ( typeof define === 'function' && define.amd ) {
    // AMD
    define( function() {
      return matchesSelector;
    });
  } else {
    // browser global
    window.matchesSelector = matchesSelector;
  }

})( this, Element.prototype );


/**
 * Rect
 * low-level utility class for basic geometry
 */

( function( window ) {

"use strict";

// -------------------------- Packery -------------------------- //

// global namespace
var Packery = window.Packery = function() {};

// -------------------------- Rect -------------------------- //

function Rect( props ) {
  // extend properties from defaults
  for ( var prop in Rect.defaults ) {
    this[ prop ] = Rect.defaults[ prop ];
  }

  for ( prop in props ) {
    this[ prop ] = props[ prop ];
  }

}

// make available
Packery.Rect = Rect;

Rect.defaults = {
  x: 0,
  y: 0,
  width: 0,
  height: 0
};

/**
 * Determines whether or not this rectangle wholly encloses another rectangle or point.
 * @param {Rect} rect
 * @returns {Boolean}
**/
Rect.prototype.contains = function( rect ) {
  // points don't have width or height
  var otherWidth = rect.width || 0;
  var otherHeight = rect.height || 0;
  return this.x <= rect.x &&
    this.y <= rect.y &&
    this.x + this.width >= rect.x + otherWidth &&
    this.y + this.height >= rect.y + otherHeight;
};

/**
 * Determines whether or not the rectangle intersects with another.
 * @param {Rect} rect
 * @returns {Boolean}
**/
Rect.prototype.overlaps = function( rect ) {
  var thisRight = this.x + this.width;
  var thisBottom = this.y + this.height;
  var rectRight = rect.x + rect.width;
  var rectBottom = rect.y + rect.height;

  // http://stackoverflow.com/a/306332
  return this.x < rectRight &&
    thisRight > rect.x &&
    this.y < rectBottom &&
    thisBottom > rect.y;
};

/**
 * @param {Rect} rect - the overlapping rect
 * @returns {Array} freeRects - rects representing the area around the rect
**/
Rect.prototype.getMaximalFreeRects = function( rect ) {

  // if no intersection, return false
  if ( !this.overlaps( rect ) ) {
    return false;
  }

  var freeRects = [];
  var freeRect;

  var thisRight = this.x + this.width;
  var thisBottom = this.y + this.height;
  var rectRight = rect.x + rect.width;
  var rectBottom = rect.y + rect.height;

  // top
  if ( this.y < rect.y ) {
    freeRect = new Rect({
      x: this.x,
      y: this.y,
      width: this.width,
      height: rect.y - this.y
    });
    freeRects.push( freeRect );
  }

  // right
  if ( thisRight > rectRight ) {
    freeRect = new Rect({
      x: rectRight,
      y: this.y,
      width: thisRight - rectRight,
      height: this.height
    });
    freeRects.push( freeRect );
  }

  // bottom
  if ( thisBottom > rectBottom ) {
    freeRect = new Rect({
      x: this.x,
      y: rectBottom,
      width: this.width,
      height: thisBottom - rectBottom
    });
    freeRects.push( freeRect );
  }

  // left
  if ( this.x < rect.x ) {
    freeRect = new Rect({
      x: this.x,
      y: this.y,
      width: rect.x - this.x,
      height: this.height
    });
    freeRects.push( freeRect );
  }

  return freeRects;
};

Rect.prototype.canFit = function( rect ) {
  return this.width >= rect.width && this.height >= rect.height;
};



})( window );


( function( window ) {

'use strict';

var Packery = window.Packery;
var Rect = Packery.Rect;


// -------------------------- Packer -------------------------- //

function Packer( width, height ) {
  this.width = width || 0;
  this.height = height || 0;

  this.reset();
}

Packer.prototype.reset = function() {
  this.spaces = [];
  this.newSpaces = [];

  var initialSpace = new Rect({
    x: 0,
    y: 0,
    width: this.width,
    height: this.height
  });

  this.spaces.push( initialSpace );
};

// change x and y of rect to fit with in Packer's available spaces
Packer.prototype.pack = function( rect ) {
  for ( var i=0, len = this.spaces.length; i < len; i++ ) {
    var space = this.spaces[i];
    if ( space.canFit( rect ) ) {
      this.placeInSpace( rect, space );
      break;
    }
  }
};

Packer.prototype.placeInSpace = function( rect, space ) {
  // place rect in space
  rect.x = space.x;
  rect.y = space.y;

  this.placed( rect );
};

// update spaces with placed rect
Packer.prototype.placed = function( rect ) {
  // update spaces
  var revisedSpaces = [];
  for ( var i=0, len = this.spaces.length; i < len; i++ ) {
    var space = this.spaces[i];
    var newSpaces = space.getMaximalFreeRects( rect );
    // add either the original space or the new spaces to the revised spaces
    if ( newSpaces ) {
      revisedSpaces.push.apply( revisedSpaces, newSpaces );
    } else {
      revisedSpaces.push( space );
    }
  }

  this.spaces = revisedSpaces;

  // remove redundant spaces
  Packer.mergeRects( this.spaces );

  this.spaces.sort( Packer.spaceSorterTopLeft );
};

// -------------------------- utility functions -------------------------- //

/**
 * Remove redundant rectangle from array of rectangles
 * @param {Array} rects: an array of Rects
 * @returns {Array} rects: an array of Rects
**/
Packer.mergeRects = function( rects ) {
  for ( var i=0, len = rects.length; i < len; i++ ) {
    var rect = rects[i];
    // skip over this rect if it was already removed
    if ( !rect ) {
      continue;
    }
    // clone rects we're testing, remove this rect
    var compareRects = rects.slice(0);
    // do not compare with self
    compareRects.splice( i, 1 );
    // compare this rect with others
    var removedCount = 0;
    for ( var j=0, jLen = compareRects.length; j < jLen; j++ ) {
      var compareRect = compareRects[j];
      // if this rect contains another,
      // remove that rect from test collection
      var indexAdjust = i > j ? 0 : 1;
      if ( rect.contains( compareRect ) ) {
        // console.log( 'current test rects:' + testRects.length, testRects );
        // console.log( i, j, indexAdjust, rect, compareRect );
        rects.splice( j + indexAdjust - removedCount, 1 );
        removedCount++;
      }
    }
  }

  return rects;
};

// top down, then left to right
Packer.spaceSorterTopLeft = function( a, b ) {
  return a.y - b.y || a.x - b.x;
};

// left to right, then top down
Packer.spaceSorterLeftTop = function( a, b ) {
  return a.x - b.x || a.y - b.y;
};

// -----  ----- //

Packery.Packer = Packer;

})( window );
/**
 * Packery Item Element
**/

( function( window ) {

'use strict';

// dependencies
var Packery = window.Packery;
var Rect = Packery.Rect;
var getSize = window.getSize;
var getStyleProperty = window.getStyleProperty;
var EventEmitter = window.EventEmitter;

// ----- get style ----- //

var defView = document.defaultView;

var getStyle = defView && defView.getComputedStyle ?
  function( elem ) {
    return defView.getComputedStyle( elem, null );
  } :
  function( elem ) {
    return elem.currentStyle;
  };


// extend objects
function extend( a, b ) {
  for ( var prop in b ) {
    a[ prop ] = b[ prop ];
  }
  return a;
}

// -------------------------- CSS3 support -------------------------- //

var transitionProperty = getStyleProperty('transition');
var transformProperty = getStyleProperty('transform');
var supportsCSS3 = transitionProperty && transformProperty;
var is3d = !!getStyleProperty('perspective');

var transitionEndEvent = {
  WebkitTransition: 'webkitTransitionEnd',
  MozTransition: 'transitionend',
  OTransition: 'otransitionend',
  transition: 'transitionend'
}[ transitionProperty ];

var transformCSSProperty = {
  WebkitTransform: '-webkit-transform',
  MozTransform: '-moz-transform',
  OTransform: '-o-transform',
  transform: 'transform'
}[ transformProperty ];

// -------------------------- Item -------------------------- //

function Item( element, packery ) {
  this.element = element;
  this.packery = packery;
  this.position = {
    x: 0,
    y: 0
  };

  this.rect = new Rect();
  // rect used for placing, in drag or Packery.fit()
  this.placeRect = new Rect();

  // style initial style
  this.element.style.position = 'absolute';
}

// inherit EventEmitter
extend( Item.prototype, EventEmitter.prototype );

// trigger specified handler for event type
Item.prototype.handleEvent = function( event ) {
  var method = 'on' + event.type;
  if ( this[ method ] ) {
    this[ method ]( event );
  }
};

Item.prototype.getSize = function() {
  this.size = getSize( this.element );
};

/**
 * apply CSS styles to element
 * @param {Object} style
 */
Item.prototype.css = function( style ) {
  var elemStyle = this.element.style;
  for ( var prop in style ) {
    elemStyle[ prop ] = style[ prop ];
  }
};

 // measure position, and sets it
Item.prototype.getPosition = function() {
  var style = getStyle( this.element );

  var x = parseInt( style.left, 10 );
  var y = parseInt( style.top, 10 );

  // clean up 'auto' or other non-integer values
  x = isNaN( x ) ? 0 : x;
  y = isNaN( y ) ? 0 : y;
  // remove padding from measurement
  var packerySize = this.packery.elementSize;
  x -= packerySize.paddingLeft;
  y -= packerySize.paddingTop;

  this.position.x = x;
  this.position.y = y;
};

// transform translate function
var translate = is3d ?
  function( x, y ) {
    return 'translate3d( ' + x + 'px, ' + y + 'px, 0)';
  } :
  function( x, y ) {
    return 'translate( ' + x + 'px, ' + y + 'px)';
  };


Item.prototype._transitionTo = function( x, y ) {
  this.getPosition();
  // get current x & y from top/left
  var curX = this.position.x;
  var curY = this.position.y;

  var compareX = parseInt( x, 10 );
  var compareY = parseInt( y, 10 );
  var didNotMove = compareX === this.position.x && compareY === this.position.y;

  // save end position
  this.setPosition( x, y );

  // if did not move and not transitioning, just go to layout
  if ( didNotMove && !this.isTransitioning ) {
    this.layoutPosition();
    return;
  }

  var transX = x - curX;
  var transY = y - curY;
  var transitionStyle = {};
  transitionStyle[ transformCSSProperty ] = translate( transX, transY );

  this.transition( transitionStyle, this.layoutPosition );
};

// non transition + transform support
Item.prototype.goTo = function( x, y ) {
  this.setPosition( x, y );
  this.layoutPosition();
};

// use transition and transforms if supported
Item.prototype.moveTo = supportsCSS3 ?
  Item.prototype._transitionTo : Item.prototype.goTo;

Item.prototype.setPosition = function( x, y ) {
  this.position.x = parseInt( x, 10 );
  this.position.y = parseInt( y, 10 );
};

Item.prototype.layoutPosition = function() {
  var packerySize = this.packery.elementSize;
  this.css({
    // set settled position, apply padding
    left: ( this.position.x + packerySize.paddingLeft ) + 'px',
    top : ( this.position.y + packerySize.paddingTop ) + 'px'
  });
  this.emitEvent( 'layout', [ this ] );
};

/**
 * @param {Object} style - CSS
 * @param {Function} onTransitionEnd
 */

// non transition, just trigger callback
Item.prototype._nonTransition = function( style, onTransitionEnd ) {
  this.css( style );
  if ( onTransitionEnd ) {
    onTransitionEnd.call( this );
  }
};

// proper transition
Item.prototype._transition = function( style, onTransitionEnd ) {
  this.transitionStyle = style;

  var transitionValue = [];
  for ( var prop in style ) {
    transitionValue.push( prop );
  }

  // enable transition
  var transitionStyle = {};
  transitionStyle[ transitionProperty + 'Property' ] = transitionValue.join(',');
  transitionStyle[ transitionProperty + 'Duration' ] = this.packery.options.transitionDuration;

  this.element.addEventListener( transitionEndEvent, this, false );

  // bind callback to transition end
  if ( onTransitionEnd ) {
    this.on( 'transitionEnd', function( _this ) {
      onTransitionEnd.call( _this );
      return true; // bind once
    });
  }

  // set transition styles
  this.css( transitionStyle );
  // set styles that are transitioning
  this.css( style );

  this.isTransitioning = true;
};

Item.prototype.transition = Item.prototype[ transitionProperty ? '_transition' : '_nonTransition' ];

Item.prototype.onwebkitTransitionEnd = function( event ) {
  this.ontransitionend( event );
};

Item.prototype.onotransitionend = function( event ) {
  this.ontransitionend( event );
};

Item.prototype.ontransitionend = function( event ) {
  // console.log('transition end');
  // disregard bubbled events from children
  if ( event.target !== this.element ) {
    return;
  }

  // trigger callback
  if ( this.onTransitionEnd ) {
    this.onTransitionEnd();
    delete this.onTransitionEnd;
  }

  this.removeTransitionStyles();
  // clean up transition styles
  var cleanStyle = {};
  for ( var prop in this.transitionStyle ) {
    cleanStyle[ prop ] = '';
  }

  this.css( cleanStyle );

  this.element.removeEventListener( transitionEndEvent, this, false );

  delete this.transitionStyle;

  this.isTransitioning = false;

  this.emitEvent( 'transitionEnd', [ this ] );
};

Item.prototype.removeTransitionStyles = function() {
  var noTransStyle = {};
  // remove transition
  noTransStyle[ transitionProperty + 'Property' ] = '';
  noTransStyle[ transitionProperty + 'Duration' ] = '';
  this.css( noTransStyle );
};

Item.prototype.remove = function() {
  // start transition
  var hiddenStyle = {
    opacity: 0
  };
  hiddenStyle[ transformCSSProperty ] = 'scale(0.001)';

  this.transition( hiddenStyle, this.removeElem );
};


// remove element from DOM
Item.prototype.removeElem = function() {
  this.element.parentNode.removeChild( this.element );
  this.emitEvent( 'remove', [ this ] );
};

Item.prototype.reveal = !transitionProperty ? function() {} : function() {
  // hide item
  var hiddenStyle = {
    opacity: 0
  };
  hiddenStyle[ transformCSSProperty ] = 'scale(0.001)';
  this.css( hiddenStyle );
  // force redraw. http://blog.alexmaccaw.com/css-transitions
  var h = this.element.offsetHeight;
  // transition to revealed
  var visibleStyle = {
    opacity: 1
  };
  visibleStyle[ transformCSSProperty ] = 'scale(1)';
  this.transition( visibleStyle );
  // hack for JSHint to hush about unused var
  h = null;
};

Item.prototype.destroy = function() {
  this.css({
    position: '',
    left: '',
    top: ''
  });
};

// -------------------------- drag -------------------------- //

Item.prototype.dragStart = function() {
  this.getPosition();
  this.removeTransitionStyles();
  // remove transform property from transition
  if ( this.isTransitioning && transformProperty ) {
    this.element.style[ transformProperty ] = 'none';
  }
  this.getSize();
  // create place rect, used for position when dragged then dropped
  // or when positioning
  this.isPlacing = true;
  this.needsPositioning = false;
  this.positionPlaceRect( this.position.x, this.position.y );
  this.isTransitioning = false;
  this.didDrag = false;
};

/**
 * handle item when it is dragged
 * @param {Number} x - horizontal position of dragged item
 * @param {Number} y - vertical position of dragged item
 */
Item.prototype.dragMove = function( x, y ) {
  this.didDrag = true;
  var packerySize = this.packery.elementSize;
  x -= packerySize.paddingLeft;
  y -= packerySize.paddingTop;
  this.positionPlaceRect( x, y );
};

Item.prototype.dragStop = function() {
  this.getPosition();
  var isDiffX = this.position.x !== this.placeRect.x;
  var isDiffY = this.position.y !== this.placeRect.y;
  // set post-drag positioning flag
  this.needsPositioning = isDiffX || isDiffY;
  // reset flag
  this.didDrag = false;
};

// -------------------------- placing -------------------------- //

/**
 * position a rect that will occupy space in the packer
 * @param {Number} x
 * @param {Number} y
 * @param {Boolean} isMaxYContained
 */
Item.prototype.positionPlaceRect = function( x, y, isMaxYOpen ) {
  this.placeRect.x = this.getPlaceRectCoord( x, true );
  this.placeRect.y = this.getPlaceRectCoord( y, false, isMaxYOpen );
};

/**
 * get x/y coordinate for place rect
 * @param {Number} coord - x or y
 * @param {Boolean} isX
 * @param {Boolean} isMaxOpen - does not limit value to outer bound
 * @returns {Number} coord - processed x or y
 */
Item.prototype.getPlaceRectCoord = function( coord, isX, isMaxOpen ) {
  var measure = isX ? 'Width' : 'Height';
  var size = this.size[ 'outer' + measure ];
  var segment = this.packery[ isX ? 'columnWidth' : 'rowHeight' ];
  var parentSize = this.packery.elementSize[ 'inner' + measure ];

  // additional parentSize calculations for Y
  if ( !isX ) {
    parentSize = Math.max( parentSize, this.packery.maxY );
    // prevent gutter from bumping up height when non-vertical grid
    if ( !this.packery.rowHeight ) {
      parentSize -= this.packery.gutter;
    }
  }

  var max;

  if ( segment ) {
    segment += this.packery.gutter;
    // allow for last column to reach the edge
    parentSize += isX ? this.packery.gutter : 0;
    // snap to closest segment
    coord = Math.round( coord / segment );
    // contain to outer bound
    // x values must be contained, y values can grow box by 1
    var maxSegments = Math[ isX ? 'floor' : 'ceil' ]( parentSize / segment );
    maxSegments -= Math.ceil( size / segment );
    max = maxSegments;
  } else {
    max = parentSize - size;
  }

  coord = isMaxOpen ? coord : Math.min( coord, max );
  coord *= segment || 1;

  return Math.max( 0, coord );
};

Item.prototype.copyPlaceRectPosition = function() {
  this.rect.x = this.placeRect.x;
  this.rect.y = this.placeRect.y;
};

// --------------------------  -------------------------- //

// publicize
Packery.Item = Item;

})( window );

/*!
 * Packery v1.0.6
 * bin-packing layout library
 * http://packery.metafizzy.co
 *
 * Commercial use requires one-time purchase of a commercial license
 * http://packery.metafizzy.co/license.html
 *
 * Non-commercial use is licensed under the MIT License
 *
 * Copyright 2013 Metafizzy
 */

( function( window ) {

'use strict';

// Packery classes
var _Packery = window.Packery;
var Rect = _Packery.Rect;
var Packer = _Packery.Packer;
var Item = _Packery.Item;

// dependencies
var classie = window.classie;
var docReady = window.docReady;
var EventEmitter = window.EventEmitter;
var eventie = window.eventie;
var getSize = window.getSize;
var matchesSelector = window.matchesSelector;

// ----- vars ----- //

var document = window.document;
var console = window.console;
var jQuery = window.jQuery;

// -------------------------- helpers -------------------------- //

// extend objects
function extend( a, b ) {
  for ( var prop in b ) {
    a[ prop ] = b[ prop ];
  }
  return a;
}

// turn element or nodeList into an array
function makeArray( obj ) {
  var ary = [];
  if ( typeof obj.length === 'number' ) {
    // convert nodeList to array
    for ( var i=0, len = obj.length; i < len; i++ ) {
      ary.push( obj[i] );
    }
  } else {
    // array of single index
    ary.push( obj );
  }
  return ary;
}

// http://stackoverflow.com/a/384380/182183
var isElement = ( typeof HTMLElement === 'object' ) ?
  function isElementDOM2( obj ) {
    return obj instanceof HTMLElement;
  } :
  function isElementQuirky( obj ) {
    return obj && typeof obj === 'object' &&
      obj.nodeType === 1 && typeof obj.nodeName === 'string';
  };

// index of helper cause IE8
var indexOf = Array.prototype.indexOf ? function( ary, obj ) {
    return ary.indexOf( obj );
  } : function( ary, obj ) {
    for ( var i=0, len = ary.length; i < len; i++ ) {
      if ( ary[i] === obj ) {
        return i;
      }
    }
    return -1;
  };


// -------------------------- Packery -------------------------- //

// globally unique identifiers
var GUID = 0;
// internal store of all Packery intances
var packeries = {};

function Packery( element, options ) {
  // bail out if not proper element
  if ( !element || !isElement( element ) ) {
    if ( console ) {
      console.error( 'bad Packery element: ' + element );
    }
    return;
  }

  this.element = element;

  // options
  this.options = extend( {}, this.options );
  extend( this.options, options );

  // add id for Packery.getFromElement
  var id = ++GUID;
  this.element.packeryGUID = id; // expando
  packeries[ id ] = this; // associate via id

  // kick it off
  this._create();

  if ( this.options.isInitLayout ) {
    this.layout();
  }
}

// inherit EventEmitter
extend( Packery.prototype, EventEmitter.prototype );

// default options
Packery.prototype.options = {
  containerStyle: {
    position: 'relative'
  },
  isInitLayout: true,
  isResizeBound: true,
  transitionDuration: '0.4s'
};

Packery.prototype._create = function() {
  // initial properties
  this.packer = new Packer();
  // get items from children
  this.reloadItems();
  // collection of element that don't get laid out
  this.stampedElements = [];
  this.stamp( this.options.stamped );

  var containerStyle = this.options.containerStyle;
  extend( this.element.style, containerStyle );

  // bind resize method
  if ( this.options.isResizeBound ) {
    this.bindResize();
  }

  // create drag handlers
  var _this = this;
  this.handleDraggabilly = {
    dragStart: function( draggie ) {
      _this.itemDragStart( draggie.element );
    },
    dragMove: function( draggie ) {
      _this.itemDragMove( draggie.element, draggie.position.x, draggie.position.y );
    },
    dragEnd: function( draggie ) {
      _this.itemDragEnd( draggie.element );
    }
  };

  this.handleUIDraggable = {
    start: function handleUIDraggableStart( event ) {
      _this.itemDragStart( event.currentTarget );
    },
    drag: function handleUIDraggableDrag( event, ui ) {
      _this.itemDragMove( event.currentTarget, ui.position.left, ui.position.top );
    },
    stop: function handleUIDraggableStop( event ) {
      _this.itemDragEnd( event.currentTarget );
    }
  };

};

// goes through all children again and gets bricks in proper order
Packery.prototype.reloadItems = function() {
  // collection of item elements
  this.items = this._getItems( this.element.children );
};


/**
 * get item elements to be used in layout
 * @param {Array or NodeList or HTMLElement} elems
 * @returns {Array} items - collection of new Packery Items
 */
Packery.prototype._getItems = function( elems ) {

  var itemElems = this._filterFindItemElements( elems );

  // create new Packery Items for collection
  var items = [];
  for ( var i=0, len = itemElems.length; i < len; i++ ) {
    var elem = itemElems[i];
    var item = new Item( elem, this );
    items.push( item );
  }

  return items;
};

/**
 * get item elements to be used in layout
 * @param {Array or NodeList or HTMLElement} elems
 * @returns {Array} items - item elements
 */
Packery.prototype._filterFindItemElements = function( elems ) {
  // make array of elems
  elems = makeArray( elems );
  var itemSelector = this.options.itemSelector;

  if ( !itemSelector ) {
    return elems;
  }

  var itemElems = [];

  // filter & find items if we have an item selector
  for ( var i=0, len = elems.length; i < len; i++ ) {
    var elem = elems[i];
    // filter siblings
    if ( matchesSelector( elem, itemSelector ) ) {
      itemElems.push( elem );
    }
    // find children
    var childElems = elem.querySelectorAll( itemSelector );
    // concat childElems to filterFound array
    for ( var j=0, jLen = childElems.length; j < jLen; j++ ) {
      itemElems.push( childElems[j] );
    }
  }

  return itemElems;
};

/**
 * getter method for getting item elements
 * @returns {Array} elems - collection of item elements
 */
Packery.prototype.getItemElements = function() {
  var elems = [];
  for ( var i=0, len = this.items.length; i < len; i++ ) {
    elems.push( this.items[i].element );
  }
  return elems;
};

// ----- init & layout ----- //

/**
 * lays out all items
 */
Packery.prototype.layout = function() {
  this._prelayout();

  // don't animate first layout
  var isInstant = this.options.isLayoutInstant !== undefined ?
    this.options.isLayoutInstant : !this._isLayoutInited;
  this.layoutItems( this.items, isInstant );

  // flag for initalized
  this._isLayoutInited = true;
};

// _init is alias for layout
Packery.prototype._init = Packery.prototype.layout;

/**
 * logic before any new layout
 */
Packery.prototype._prelayout = function() {
  // reset packer
  this.elementSize = getSize( this.element );

  this._getMeasurements();

  this.packer.width = this.elementSize.innerWidth + this.gutter;
  this.packer.height = Number.POSITIVE_INFINITY;
  this.packer.reset();

  // layout
  this.maxY = 0;
  this.placeStampedElements();
};

/**
 * update columnWidth, rowHeight, & gutter
 * @private
 */
Packery.prototype._getMeasurements = function() {
  this._getMeasurement( 'columnWidth', 'width' );
  this._getMeasurement( 'rowHeight', 'height' );
  this._getMeasurement( 'gutter', 'width' );
};

/**
 * get measurement from option, for columnWidth, rowHeight, gutter
 * if option is String -> get element from selector string, & get size of element
 * if option is Element -> get size of element
 * else use option as a number
 *
 * @param {String} measurement
 * @param {String} size - width or height
 * @private
 */
Packery.prototype._getMeasurement = function( measurement, size ) {
  var option = this.options[ measurement ];
  var elem;
  if ( !option ) {
    // default to 0
    this[ measurement ] = 0;
  } else {
    if ( typeof option === 'string' ) {
      elem = this.element.querySelector( option );
    } else if ( isElement( option ) ) {
      elem = option;
    }
    // use size of element, if element
    this[ measurement ] = elem ? getSize( elem )[ size ] : option;
  }
};

/**
 * layout a collection of item elements
 * @param {Array} items - array of Packery.Items
 * @param {Boolean} isInstant - disable transitions for setting item position
 */
Packery.prototype.layoutItems = function( items, isInstant ) {
  // console.log('layout Items');
  var layoutItems = this._getLayoutItems( items );

  if ( !layoutItems || !layoutItems.length ) {
    // no items, just emit layout complete with empty array
    this.emitEvent( 'layoutComplete', [ this, [] ] );
  } else {
    this._itemsOn( layoutItems, 'layout', function onItemsLayout() {
      this.emitEvent( 'layoutComplete', [ this, layoutItems ] );
    });

    for ( var i=0, len = layoutItems.length; i < len; i++ ) {
      var item = layoutItems[i];
      // listen to layout events for callback
      this._packItem( item );
      this._layoutItem( item, isInstant );
    }
  }

  // set container size
  var elemSize = this.elementSize;
  var elemH = this.maxY - this.gutter;
  // add padding and border width if border box
  if ( elemSize.isBorderBox ) {
    elemH += elemSize.paddingBottom + elemSize.paddingTop +
      elemSize.borderTopWidth + elemSize.borderBottomWidth;
  }
  // prevent negative size, which causes error in IE
  elemH = Math.max( elemH, 0 );
  this.element.style.height = elemH + 'px';
};

/**
 * filters items for non-ignored items
 * @param {Array} items
 * @returns {Array} layoutItems
 */
Packery.prototype._getLayoutItems = function( items ) {
  var layoutItems = [];
  for ( var i=0, len = items.length; i < len; i++ ) {
    var item = items[i];
    if ( !item.isIgnored ) {
      layoutItems.push( item );
    }
  }
  return layoutItems;
};

/**
 * layout item in packer
 * @param {Packery.Item} item
 */
Packery.prototype._packItem = function( item ) {
  this._setRectSize( item.element, item.rect );
  // pack the rect in the packer
  this.packer.pack( item.rect );
  this._setMaxY( item.rect );
};

/**
 * set max Y value, for height of container
 * @param {Packery.Rect} rect
 * @private
 */
Packery.prototype._setMaxY = function( rect ) {
  this.maxY = Math.max( rect.y + rect.height, this.maxY );
};

/**
 * set the width and height of a rect, applying columnWidth and rowHeight
 * @param {Element} elem
 * @param {Packery.Rect} rect
 */
Packery.prototype._setRectSize = function( elem, rect ) {
  var size = getSize( elem );
  var w = size.outerWidth;
  var h = size.outerHeight;
  // size for columnWidth and rowHeight, if available
  var colW = this.columnWidth + this.gutter;
  var rowH = this.rowHeight + this.gutter;
  w = this.columnWidth ? Math.ceil( w / colW ) * colW : w + this.gutter;
  h = this.rowHeight ? Math.ceil( h / rowH ) * rowH : h + this.gutter;
  // rect must fit in packer
  rect.width = Math.min( w, this.packer.width );
  rect.height = h;
};

/**
 * Sets position of item in DOM
 * @param {Packery.Item} item
 * @param {Boolean} isInstant - disables transitions
 */
Packery.prototype._layoutItem = function( item, isInstant ) {

  // copy over position of packed rect to item element
  var rect = item.rect;
  if ( isInstant ) {
    // if not transition, just set CSS
    item.goTo( rect.x, rect.y );
  } else {
    item.moveTo( rect.x, rect.y );
  }

};

/**
 * trigger a callback for a collection of items events
 * @param {Array} items - Packery.Items
 * @param {String} eventName
 * @param {Function} callback
 */
Packery.prototype._itemsOn = function( items, eventName, callback ) {
  var doneCount = 0;
  var count = items.length;
  // event callback
  var _this = this;
  function tick() {
    doneCount++;
    if ( doneCount === count ) {
      callback.call( _this );
    }
    return true; // bind once
  }
  // bind callback
  for ( var i=0, len = items.length; i < len; i++ ) {
    var item = items[i];
    item.on( eventName, tick );
  }
};

// -------------------------- stamp -------------------------- //

/**
 * adds elements to stampedElements
 * @param {NodeList, Array, Element, or String} elems
 */
Packery.prototype.stamp = function( elems ) {
  if ( !elems ) {
    return;
  }
  // if string, use argument as selector string
  if ( typeof elems === 'string' ) {
    elems = this.element.querySelectorAll( elems );
  }
  elems = makeArray( elems );
  this.stampedElements.push.apply( this.stampedElements, elems );
  // ignore
  for ( var i=0, len = elems.length; i < len; i++ ) {
    var elem = elems[i];
    this.ignore( elem );
  }
};

/**
 * removes elements to stampedElements
 * @param {NodeList, Array, or Element} elems
 */
Packery.prototype.unstamp = function( elems ) {
  if ( !elems ){
    return;
  }
  elems = makeArray( elems );

  for ( var i=0, len = elems.length; i < len; i++ ) {
    var elem = elems[i];
    // filter out removed stamp elements
    var index = indexOf( this.stampedElements, elem );
    if ( index !== -1 ) {
      this.stampedElements.splice( index, 1 );
    }
    this.unignore( elem );
  }

};

// make spaces for stamped elements
Packery.prototype.placeStampedElements = function() {
  if ( !this.stampedElements || !this.stampedElements.length ) {
    return;
  }

  this._getBounds();

  for ( var i=0, len = this.stampedElements.length; i < len; i++ ) {
    var elem = this.stampedElements[i];
    this.placeStamp( elem );
  }
};

// update boundingLeft / Top
Packery.prototype._getBounds = function() {
  // get bounding rect for container element
  var elementBoundingRect = this.element.getBoundingClientRect();
  this._boundingLeft = elementBoundingRect.left + this.elementSize.paddingLeft;
  this._boundingTop  = elementBoundingRect.top  + this.elementSize.paddingTop;
};

/**
 * makes space for element
 * @param {Element} elem
 */
Packery.prototype.placeStamp = function( elem ) {
  var item = this.getItem( elem );
  var rect;
  if ( item && item.isPlacing ) {
    rect = item.placeRect;
  } else {
    rect = this._getElementOffsetRect( elem );
  }

  this._setRectSize( elem, rect );
  // save its space in the packer
  this.packer.placed( rect );
  this._setMaxY( rect );
};

/**
 * get x/y position of element relative to container element
 * @param {Element} elem
 * @returns {Rect} rect
 */
Packery.prototype._getElementOffsetRect = function( elem ) {
  var boundingRect = elem.getBoundingClientRect();
  var rect = new Rect({
    x: boundingRect.left - this._boundingLeft,
    y: boundingRect.top - this._boundingTop
  });
  rect.x -= this.elementSize.borderLeftWidth;
  rect.y -= this.elementSize.borderTopWidth;
  return rect;
};

// -------------------------- resize -------------------------- //

// enable event handlers for listeners
// i.e. resize -> onresize
Packery.prototype.handleEvent = function( event ) {
  var method = 'on' + event.type;
  if ( this[ method ] ) {
    this[ method ]( event );
  }
};

/**
 * Bind layout to window resizing
 */
Packery.prototype.bindResize = function() {
  // bind just one listener
  if ( this.isResizeBound ) {
    return;
  }
  eventie.bind( window, 'resize', this );
  this.isResizeBound = true;
};

/**
 * Unbind layout to window resizing
 */
Packery.prototype.unbindResize = function() {
  eventie.unbind( window, 'resize', this );
  this.isResizeBound = false;
};

// original debounce by John Hann
// http://unscriptable.com/index.php/2009/03/20/debouncing-javascript-methods/

// this fires every resize
Packery.prototype.onresize = function() {
  if ( this.resizeTimeout ) {
    clearTimeout( this.resizeTimeout );
  }

  var _this = this;
  function delayed() {
    _this.resize();
  }

  this.resizeTimeout = setTimeout( delayed, 100 );
};

// debounced, layout on resize
Packery.prototype.resize = function() {
  // don't trigger if size did not change
  var size = getSize( this.element );
  // check that elementSize and size are there
  // IE8 triggers resize on body size change, so they might not be
  var hasSizes = this.elementSize && size;
  if ( hasSizes && size.innerWidth === this.elementSize.innerWidth ) {
    return;
  }

  this.layout();

  delete this.resizeTimeout;
};


// -------------------------- methods -------------------------- //

/**
 * add items to Packery instance
 * @param {Array or NodeList or Element} elems
 * @returns {Array} items - Packery.Items
**/
Packery.prototype.addItems = function( elems ) {
  var items = this._getItems( elems );
  if ( !items.length ) {
    return;
  }
  // add items to collection
  this.items.push.apply( this.items, items );
  return items;
};

/**
 * Layout newly-appended item elements
 * @param {Array or NodeList or Element} elems
 */
Packery.prototype.appended = function( elems ) {
  var items = this.addItems( elems );
  if ( !items.length ) {
    return;
  }
  // layout and reveal just the new items
  this.layoutItems( items, true );
  this.reveal( items );
};

/**
 * Layout prepended elements
 * @param {Array or NodeList or Element} elems
 */
Packery.prototype.prepended = function( elems ) {
  var items = this._getItems( elems );
  if ( !items.length ) {
    return;
  }
  // add items to beginning of collection
  var previousItems = this.items.slice(0);
  this.items = items.concat( previousItems );
  // start new layout
  this._prelayout();
  // layout new stuff without transition
  this.layoutItems( items, true );
  this.reveal( items );
  // layout previous items
  this.layoutItems( previousItems );
};

// reveal a collection of items
Packery.prototype.reveal = function( items ) {
  if ( !items || !items.length ) {
    return;
  }
  for ( var i=0, len = items.length; i < len; i++ ) {
    var item = items[i];
    item.reveal();
  }
};

/**
 * get Packery.Item, given an Element
 * @param {Element} elem
 * @param {Function} callback
 * @returns {Packery.Item} item
 */
Packery.prototype.getItem = function( elem ) {
  // loop through items to get the one that matches
  for ( var i=0, len = this.items.length; i < len; i++ ) {
    var item = this.items[i];
    if ( item.element === elem ) {
      // return item
      return item;
    }
  }
};

/**
 * get collection of Packery.Items, given Elements
 * @param {Array} elems
 * @returns {Array} items - Packery.Items
 */
Packery.prototype.getItems = function( elems ) {
  if ( !elems || !elems.length ) {
    return;
  }
  var items = [];
  for ( var i=0, len = elems.length; i < len; i++ ) {
    var elem = elems[i];
    var item = this.getItem( elem );
    if ( item ) {
      items.push( item );
    }
  }

  return items;
};

/**
 * remove element(s) from instance and DOM
 * @param {Array or NodeList or Element} elems
 */
Packery.prototype.remove = function( elems ) {
  elems = makeArray( elems );

  var removeItems = this.getItems( elems );

  this._itemsOn( removeItems, 'remove', function() {
    this.emitEvent( 'removeComplete', [ this, removeItems ] );
  });

  for ( var i=0, len = removeItems.length; i < len; i++ ) {
    var item = removeItems[i];
    item.remove();
    // remove item from collection
    var index = indexOf( this.items, item );
    this.items.splice( index, 1 );
  }
};

/**
 * keep item in collection, but do not lay it out
 * @param {Element} elem
 */
Packery.prototype.ignore = function( elem ) {
  var item = this.getItem( elem );
  if ( item ) {
    item.isIgnored = true;
  }
};

/**
 * return item to layout collection
 * @param {Element} elem
 */
Packery.prototype.unignore = function( elem ) {
  var item = this.getItem( elem );
  if ( item ) {
    delete item.isIgnored;
  }
};

Packery.prototype.sortItemsByPosition = function() {
  // console.log('sortItemsByPosition');
  this.items.sort( function( a, b ) {
    return a.position.y - b.position.y || a.position.x - b.position.x;
  });
};

/**
 * Fit item element in its current position
 * Packery will position elements around it
 * useful for expanding elements
 *
 * @param {Element} elem
 * @param {Number} x - horizontal destination position, optional
 * @param {Number} y - vertical destination position, optional
 */
Packery.prototype.fit = function( elem, x, y ) {
  var item = this.getItem( elem );
  if ( !item ) {
    return;
  }

  // prepare internal properties
  this._getMeasurements();

  // stamp item to get it out of layout
  this.stamp( item.element );
  // required for positionPlaceRect
  item.getSize();
  // set placing flag
  item.isPlacing = true;
  // fall back to current position for fitting
  x = x === undefined ? item.rect.x: x;
  y = y === undefined ? item.rect.y: y;

  // position it best at its destination
  item.positionPlaceRect( x, y, true );

  // emit event when item is fit and other items are laid out
  var _this = this;
  var ticks = 0;
  function tick() {
    ticks++;
    if ( ticks !== 2 ) {
      return;
    }
    _this.emitEvent( 'fitComplete', [ _this, item ] );
  }
  item.on( 'layout', function() {
    tick();
    return true;
  });
  this.on( 'layoutComplete', function() {
    tick();
    return true;
  });
  item.moveTo( item.placeRect.x, item.placeRect.y );
  // layout everything else
  this.layout();

  // return back to regularly scheduled programming
  this.unstamp( item.element );
  this.sortItemsByPosition();
  // un set placing flag, back to normal
  item.isPlacing = false;
  // copy place rect position
  item.copyPlaceRectPosition();
};

// -------------------------- drag -------------------------- //

/**
 * handle an item drag start event
 * @param {Element} elem
 */
Packery.prototype.itemDragStart = function( elem ) {
  this.stamp( elem );
  var item = this.getItem( elem );
  if ( item ) {
    item.dragStart();
  }
};

/**
 * handle an item drag move event
 * @param {Element} elem
 * @param {Number} x - horizontal change in position
 * @param {Number} y - vertical change in position
 */
Packery.prototype.itemDragMove = function( elem, x, y ) {
  var item = this.getItem( elem );
  if ( item ) {
    item.dragMove( x, y );
  }

  // debounce
  var _this = this;
  // debounce triggering layout
  function delayed() {
    _this.layout();
    delete _this.dragTimeout;
  }

  this.clearDragTimeout();

  this.dragTimeout = setTimeout( delayed, 40 );
};

Packery.prototype.clearDragTimeout = function() {
  if ( this.dragTimeout ) {
    clearTimeout( this.dragTimeout );
  }
};

/**
 * handle an item drag end event
 * @param {Element} elem
 */
Packery.prototype.itemDragEnd = function( elem ) {
  var item = this.getItem( elem );
  var itemDidDrag;
  if ( item ) {
    itemDidDrag = item.didDrag;
    item.dragStop();
  }
  // if elem didn't move, or if it doesn't need positioning
  // unignore and unstamp and call it a day
  if ( !item || ( !itemDidDrag && !item.needsPositioning ) ) {
    this.unstamp( elem );
    return;
  }
  // procced with dragged item

  classie.add( item.element, 'is-positioning-post-drag' );

  // save this var, as it could get reset in dragStart
  var itemNeedsPositioning = item.needsPositioning;
  var asyncCount = itemNeedsPositioning ? 2 : 1;
  var completeCount = 0;
  var _this = this;
  function onLayoutComplete() {
    completeCount++;
    // don't proceed if not complete
    if ( completeCount !== asyncCount ) {
      return true;
    }
    // reset item
    if ( item ) {
      classie.remove( item.element, 'is-positioning-post-drag' );
      item.isPlacing = false;
      item.copyPlaceRectPosition();
    }

    _this.unstamp( elem );
    // only sort when item moved
    _this.sortItemsByPosition();

    // emit item drag event now that everything is done
    if ( item && itemNeedsPositioning ) {
      _this.emitEvent( 'dragItemPositioned', [ _this, item ] );
    }
    // listen once
    return true;
  }

  if ( itemNeedsPositioning ) {
    item.on( 'layout', onLayoutComplete );
    item.moveTo( item.placeRect.x, item.placeRect.y );
  } else if ( item ) {
    // item didn't need placement
    item.copyPlaceRectPosition();
  }

  this.clearDragTimeout();
  this.on( 'layoutComplete', onLayoutComplete );
  this.layout();

};

/**
 * binds Draggabilly events
 * @param {Draggabilly} draggie
 */
Packery.prototype.bindDraggabillyEvents = function( draggie ) {
  draggie.on( 'dragStart', this.handleDraggabilly.dragStart );
  draggie.on( 'dragMove', this.handleDraggabilly.dragMove );
  draggie.on( 'dragEnd', this.handleDraggabilly.dragEnd );
};

/**
 * binds jQuery UI Draggable events
 * @param {jQuery} $elems
 */
Packery.prototype.bindUIDraggableEvents = function( $elems ) {
  $elems
    .on( 'dragstart', this.handleUIDraggable.start )
    .on( 'drag', this.handleUIDraggable.drag )
    .on( 'dragstop', this.handleUIDraggable.stop );
};

// ----- destroy ----- //

// remove and disable Packery instance
Packery.prototype.destroy = function() {
  // reset element styles
  this.element.style.position = '';
  this.element.style.height = '';
  delete this.element.packeryGUID;

  // destroy items
  for ( var i=0, len = this.items.length; i < len; i++ ) {
    var item = this.items[i];
    item.destroy();
  }

  this.unbindResize();
};

// -------------------------- data -------------------------- //

/**
 * get Packery instance from element
 * @param {Element} elem
 * @returns {Packery}
 */
Packery.data = function( elem ) {
  var id = elem.packeryGUID;
  return id && packeries[ id ];
};

// -------------------------- declarative -------------------------- //

/**
 * allow user to initialize Packery via .js-packery class
 * options are parsed from data-packery-option attribute
 */
docReady( function() {
  var elems = document.querySelectorAll('.js-packery');

  for ( var i=0, len = elems.length; i < len; i++ ) {
    var elem = elems[i];
    var attr = elem.getAttribute('data-packery-options');
    var options;
    try {
      options = attr && JSON.parse( attr );
    } catch ( error ) {
      // log error, do not initialize
      if ( console ) {
        console.error( 'Error parsing data-packery-options on ' +
          elem.nodeName.toLowerCase() + ( elem.id ? '#' + elem.id : '' ) + ': ' +
          error );
      }
      continue;
    }
    // initialize
    var pckry = new Packery( elem, options );
    // make available via $().data('packery')
    if ( jQuery ) {
      jQuery.data( elem, 'packery', pckry );
    }
  }
});

// -------------------------- jQuery bridge -------------------------- //

// make into jQuery plugin
if ( jQuery && jQuery.bridget ) {
  jQuery.bridget( 'packery', Packery );
}

// -------------------------- transport -------------------------- //

// back in global
Packery.Rect = Rect;
Packery.Packer = Packer;
Packery.Item = Item;
window.Packery = Packery;

})( window );