diff --git a/_includes/changelog.html b/_includes/changelog.html
index 0ffc50e..315adc1 100644
--- a/_includes/changelog.html
+++ b/_includes/changelog.html
@@ -1,6 +1,6 @@
Changes
- v4.2.0 5/9/17 - Replace webpack build with rollup. Replace jshint and jscs with eslint.v4.2.0 5/10/17 - Replace webpack build with rollup. Replace jshint and jscs with eslint. Add filterMode option.v4.1.1 3/21/17 - the before styles for a ShuffleItem were not applied if the item didn’t move.v4.1.0 1/30/17 - Use webpack-2 to bundle Shuffle.v4.0.2 9/15/16 - Update custom-event-polyfill dependency.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 0]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 0]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({ itemSize, positions, gridSize, total, threshold, buffer }) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(\n Math.round(gridSize * shortColumnIndex),\n Math.round(setY[shortColumnIndex]));\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n","import 'custom-event-polyfill';\nimport matches from 'matches-selector';\nimport arrayUnique from 'array-uniq';\nimport xtend from 'xtend';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\nimport Point from './point';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport { getItemPosition, getColumnSpan, getAvailablePositions, getShortColumn } from './layout';\nimport arrayMax from './array-max';\n\nfunction toArray(arrayLike) {\n return Array.prototype.slice.call(arrayLike);\n}\n\nfunction arrayIncludes(array, obj) {\n if (arguments.length === 2) {\n return arrayIncludes(array)(obj);\n }\n\n return obj => array.indexOf(obj) > -1;\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle {\n\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n this.options = xtend(Shuffle.options, options);\n\n this.useSizer = false;\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n if (this.options.sizer) {\n this.useSizer = true;\n }\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems();\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this._setTransitions();\n this.element.style.transition = 'height ' + this.options.speed + 'ms ' + this.options.easing;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {Function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle ?\n this.options.throttle(resizeFunction, this.options.throttleTime) :\n resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n\n // Check for an element\n } else if (option && option.nodeType && option.nodeType === 1) {\n return option;\n\n // Check for jQuery object\n } else if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string} [category] Category to filter by. If it's given, the last\n * category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|Function} category Category or function to filter by.\n * @param {Array.} items A collection of items to filter.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|Function} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n\n // Check each element's data-groups attribute against the given category.\n }\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimeter ?\n attr.split(this.options.delimeter) :\n JSON.parse(attr);\n\n if (Array.isArray(category)) {\n if(this.options.filterMode!=Shuffle.filterMode.EXCLUSIVE){\n return category.every(arrayIncludes(keys));\n } else {\n return category.some(arrayIncludes(keys));\n }\n }\n\n return arrayIncludes(keys, category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {Array.} [items] Optionally specifiy at set to initialize.\n * @private\n */\n _initItems(items = this.items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @private\n */\n _disposeItems(items = this.items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of Shuffle.\n * @param {Array.} items Shuffle items to set transitions on.\n * @private\n */\n _setTransitions(items = this.items) {\n const speed = this.options.speed;\n const easing = this.options.easing;\n\n const str = this.options.useTransforms ?\n `transform ${speed}ms ${easing}, opacity ${speed}ms ${easing}` :\n `top ${speed}ms ${easing}, left ${speed}ms ${easing}, opacity ${speed}ms ${easing}`;\n\n items.forEach((item) => {\n item.element.style.transition = str;\n });\n }\n\n _getItems() {\n return toArray(this.element.children)\n .filter(el => matches(el, this.options.itemSelector))\n .map(el => new ShuffleItem(el));\n }\n\n /**\n * When new elements are added to the shuffle container, update the array of\n * items because that is the order `_layout` calls them.\n */\n _updateItemsOrder() {\n const children = this.element.children;\n this.items = sorter(this.items, {\n by(element) {\n return Array.prototype.indexOf.call(children, element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter(item => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter(item => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.useSizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.useSizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns) <\n this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * @return {boolean} Whether the event was prevented or not.\n */\n _dispatch(name, details = {}) {\n if (this.isDestroyed) {\n return false;\n }\n\n details.shuffle = this;\n return !this.element.dispatchEvent(new CustomEvent(name, {\n bubbles: true,\n cancelable: false,\n detail: details,\n }));\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {Array.} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n let count = 0;\n items.forEach((item) => {\n const currPos = item.point;\n const currScale = item.scale;\n const itemSize = Shuffle.getSize(item.element, true);\n const pos = this._getItemPosition(itemSize);\n\n function callback() {\n item.element.style.transitionDelay = '';\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(currPos, pos) && currScale === ShuffleItem.Scale.VISIBLE) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = pos;\n item.scale = ShuffleItem.Scale.VISIBLE;\n\n // Use xtend here to clone the object so that the `before` object isn't\n // modified when the transition delay is added.\n const styles = xtend(ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {Array.} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.scale === ShuffleItem.Scale.HIDDEN) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n\n const styles = xtend(ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n // Will need to check height in the future if it's layed out horizontaly\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // containerWidth hasn't changed, don't do anything\n if (containerWidth === this.containerWidth) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {Object} obj Transition options.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @private\n */\n _getStylesForTransition({ item, styles }) {\n if (!styles.transitionDelay) {\n styles.transitionDelay = '0ms';\n }\n\n const x = item.point.x;\n const y = item.point.y;\n\n if (this.options.useTransforms) {\n styles.transform = `translate(${x}px, ${y}px) scale(${item.scale})`;\n } else {\n styles.left = x + 'px';\n styles.top = y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {Function} itemCallback Callback for the item.\n * @param {Function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {Function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(this._getStylesForTransition(opts));\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatchLayout();\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatchLayout();\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Array.} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map(obj => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Array.} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map(obj => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(this._getStylesForTransition(obj));\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatchLayout();\n }\n\n _dispatchLayout() {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|Function|Array.} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} opts the options object for the sorted plugin\n */\n sort(opts = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n let items = this._getFilteredItems();\n items = sorter(items, opts);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = opts;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} isOnlyLayout If true, column and gutter widths won't be\n * recalculated.\n */\n update(isOnlyLayout) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. 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+{"version":3,"file":"shuffle.js","sources":["../node_modules/custom-event-polyfill/custom-event-polyfill.js","../node_modules/matches-selector/index.js","../node_modules/array-uniq/index.js","../node_modules/xtend/immutable.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/array-min.js","../src/layout.js","../src/shuffle.js"],"sourcesContent":["// Polyfill for creating CustomEvents on IE9/10/11\n\n// code pulled from:\n// https://github.com/d4tocchini/customevent-polyfill\n// https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent#Polyfill\n\ntry {\n var ce = new window.CustomEvent('test');\n ce.preventDefault();\n if (ce.defaultPrevented !== true) {\n // IE has problems with .preventDefault() on custom events\n // http://stackoverflow.com/questions/23349191\n throw new Error('Could not prevent default');\n }\n} catch(e) {\n var CustomEvent = function(event, params) {\n var evt, origPrevent;\n params = params || {\n bubbles: false,\n cancelable: false,\n detail: undefined\n };\n\n evt = document.createEvent(\"CustomEvent\");\n evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);\n origPrevent = evt.preventDefault;\n evt.preventDefault = function () {\n origPrevent.call(this);\n try {\n Object.defineProperty(this, 'defaultPrevented', {\n get: function () {\n return true;\n }\n });\n } catch(e) {\n this.defaultPrevented = true;\n }\n };\n return evt;\n };\n\n CustomEvent.prototype = window.Event.prototype;\n window.CustomEvent = CustomEvent; // expose definition to window\n}\n","'use strict';\n\nvar proto = Element.prototype;\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}","'use strict';\n\n// there's 3 implementations written in increasing order of efficiency\n\n// 1 - no Set type is defined\nfunction uniqNoSet(arr) {\n\tvar ret = [];\n\n\tfor (var i = 0; i < arr.length; i++) {\n\t\tif (ret.indexOf(arr[i]) === -1) {\n\t\t\tret.push(arr[i]);\n\t\t}\n\t}\n\n\treturn ret;\n}\n\n// 2 - a simple Set type is defined\nfunction uniqSet(arr) {\n\tvar seen = new Set();\n\treturn arr.filter(function (el) {\n\t\tif (!seen.has(el)) {\n\t\t\tseen.add(el);\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t});\n}\n\n// 3 - a standard Set type is defined and it has a forEach method\nfunction uniqSetWithForEach(arr) {\n\tvar ret = [];\n\n\t(new Set(arr)).forEach(function (el) {\n\t\tret.push(el);\n\t});\n\n\treturn ret;\n}\n\n// V8 currently has a broken implementation\n// https://github.com/joyent/node/issues/8449\nfunction doesForEachActuallyWork() {\n\tvar ret = false;\n\n\t(new Set([true])).forEach(function (el) {\n\t\tret = el;\n\t});\n\n\treturn ret === true;\n}\n\nif ('Set' in global) {\n\tif (typeof Set.prototype.forEach === 'function' && doesForEachActuallyWork()) {\n\t\tmodule.exports = uniqSetWithForEach;\n\t} else {\n\t\tmodule.exports = uniqSet;\n\t}\n} else {\n\tmodule.exports = uniqNoSet;\n}\n","module.exports = extend\n\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction extend() {\n var target = {}\n\n for (var i = 0; i < arguments.length; i++) {\n var source = arguments[i]\n\n for (var key in source) {\n if (hasOwnProperty.call(source, key)) {\n target[key] = source[key]\n }\n }\n }\n\n return target\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element) {\n id += 1;\n this.id = id;\n this.element = element;\n this.isVisible = true;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n left: 0,\n visibility: 'visible',\n 'will-change': 'transform',\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {},\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","const element = document.body || document.documentElement;\nconst e = document.createElement('div');\ne.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\nelement.appendChild(e);\n\nconst width = window.getComputedStyle(e, null).width;\nconst ret = width === '10px';\n\nelement.removeChild(e);\n\nexport default ret;\n","import getNumber from './get-number';\nimport COMPUTED_SIZE_INCLUDES_PADDING from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(element, style,\n styles = window.getComputedStyle(element, null)) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'width') {\n value += getNumber(styles.paddingLeft) +\n getNumber(styles.paddingRight) +\n getNumber(styles.borderLeftWidth) +\n getNumber(styles.borderRightWidth);\n } else if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'height') {\n value += getNumber(styles.paddingTop) +\n getNumber(styles.paddingBottom) +\n getNumber(styles.borderTopWidth) +\n getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","import xtend from 'xtend';\n\n/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\n const opts = xtend(defaults, options);\n const original = [].slice.call(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 0]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 0]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({ itemSize, positions, gridSize, total, threshold, buffer }) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(\n Math.round(gridSize * shortColumnIndex),\n Math.round(setY[shortColumnIndex]));\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n","import 'custom-event-polyfill';\nimport matches from 'matches-selector';\nimport arrayUnique from 'array-uniq';\nimport xtend from 'xtend';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\nimport Point from './point';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport { getItemPosition, getColumnSpan, getAvailablePositions, getShortColumn } from './layout';\nimport arrayMax from './array-max';\n\nfunction toArray(arrayLike) {\n return Array.prototype.slice.call(arrayLike);\n}\n\nfunction arrayIncludes(array, obj) {\n return array.indexOf(obj) > -1;\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle {\n\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n this.options = xtend(Shuffle.options, options);\n\n this.useSizer = false;\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n if (this.options.sizer) {\n this.useSizer = true;\n }\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems();\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this._setTransitions();\n this.element.style.transition = 'height ' + this.options.speed + 'ms ' + this.options.easing;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {Function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle ?\n this.options.throttle(resizeFunction, this.options.throttleTime) :\n resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n\n // Check for an element\n } else if (option && option.nodeType && option.nodeType === 1) {\n return option;\n\n // Check for jQuery object\n } else if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string} [category] Category to filter by. If it's given, the last\n * category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|Function} category Category or function to filter by.\n * @param {Array.} items A collection of items to filter.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|Function} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimeter ?\n attr.split(this.options.delimeter) :\n JSON.parse(attr);\n\n function testCategory(category) {\n return arrayIncludes(keys, category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return arrayIncludes(keys, category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {Array.} [items] Optionally specifiy at set to initialize.\n * @private\n */\n _initItems(items = this.items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @private\n */\n _disposeItems(items = this.items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of Shuffle.\n * @param {Array.} items Shuffle items to set transitions on.\n * @private\n */\n _setTransitions(items = this.items) {\n const speed = this.options.speed;\n const easing = this.options.easing;\n\n const str = this.options.useTransforms ?\n `transform ${speed}ms ${easing}, opacity ${speed}ms ${easing}` :\n `top ${speed}ms ${easing}, left ${speed}ms ${easing}, opacity ${speed}ms ${easing}`;\n\n items.forEach((item) => {\n item.element.style.transition = str;\n });\n }\n\n _getItems() {\n return toArray(this.element.children)\n .filter(el => matches(el, this.options.itemSelector))\n .map(el => new ShuffleItem(el));\n }\n\n /**\n * When new elements are added to the shuffle container, update the array of\n * items because that is the order `_layout` calls them.\n */\n _updateItemsOrder() {\n const children = this.element.children;\n this.items = sorter(this.items, {\n by(element) {\n return Array.prototype.indexOf.call(children, element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter(item => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter(item => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.useSizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.useSizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns) <\n this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * @return {boolean} Whether the event was prevented or not.\n */\n _dispatch(name, details = {}) {\n if (this.isDestroyed) {\n return false;\n }\n\n details.shuffle = this;\n return !this.element.dispatchEvent(new CustomEvent(name, {\n bubbles: true,\n cancelable: false,\n detail: details,\n }));\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {Array.} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n let count = 0;\n items.forEach((item) => {\n const currPos = item.point;\n const currScale = item.scale;\n const itemSize = Shuffle.getSize(item.element, true);\n const pos = this._getItemPosition(itemSize);\n\n function callback() {\n item.element.style.transitionDelay = '';\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(currPos, pos) && currScale === ShuffleItem.Scale.VISIBLE) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = pos;\n item.scale = ShuffleItem.Scale.VISIBLE;\n\n // Use xtend here to clone the object so that the `before` object isn't\n // modified when the transition delay is added.\n const styles = xtend(ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {Array.} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.scale === ShuffleItem.Scale.HIDDEN) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n\n const styles = xtend(ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n // Will need to check height in the future if it's layed out horizontaly\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // containerWidth hasn't changed, don't do anything\n if (containerWidth === this.containerWidth) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {Object} obj Transition options.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @private\n */\n _getStylesForTransition({ item, styles }) {\n if (!styles.transitionDelay) {\n styles.transitionDelay = '0ms';\n }\n\n const x = item.point.x;\n const y = item.point.y;\n\n if (this.options.useTransforms) {\n styles.transform = `translate(${x}px, ${y}px) scale(${item.scale})`;\n } else {\n styles.left = x + 'px';\n styles.top = y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {Function} itemCallback Callback for the item.\n * @param {Function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {Function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(this._getStylesForTransition(opts));\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatchLayout();\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatchLayout();\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Array.} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map(obj => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Array.} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map(obj => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(this._getStylesForTransition(obj));\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatchLayout();\n }\n\n _dispatchLayout() {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|Function|Array.} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} opts the options object for the sorted plugin\n */\n sort(opts = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n let items = this._getFilteredItems();\n items = sorter(items, opts);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = opts;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} isOnlyLayout If true, column and gutter widths won't be\n * recalculated.\n */\n update(isOnlyLayout) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Array.} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map(el => new ShuffleItem(el));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Add transition to each item.\n this._setTransitions(items);\n\n // Update the list of items.\n this.items = this.items.concat(items);\n this._updateItemsOrder();\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout) {\n this.isEnabled = true;\n if (isUpdateLayout !== false) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items\n * @param {Array.} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle object\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map(element => this.getItemByElement(element))\n .filter(item => !!item);\n\n const handleLayout = () => {\n this.element.removeEventListener(Shuffle.EventType.LAYOUT, handleLayout);\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter(item => !arrayIncludes(oldItems, item));\n this._updateItemCount();\n\n this.element.addEventListener(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or null if it's not found.\n */\n getItemByElement(element) {\n for (let i = this.items.length - 1; i >= 0; i--) {\n if (this.items[i].element === element) {\n return this.items[i];\n }\n }\n\n return null;\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems();\n\n // Null DOM references\n this.items = null;\n this.options.sizer = null;\n this.element = null;\n this._transitions = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. The `offsetWidth` property.\n * - This value stays the same regardless of the elements transform property,\n * however, it does not return subpixel values.\n * 3. getComputedStyle()\n * - This works great Chrome, Firefox, Safari, but IE<=11 does not include\n * padding and border when box-sizing: border-box is set, requiring a feature\n * test and extra work to add the padding back for IE and other browsers which\n * follow the W3C spec here.\n *\n * @param {Element} element The element.\n * @param {boolean} [includeMargins] Whether to include margins. Default is false.\n * @return {{width: number, height: number}} The width and height.\n */\n static getSize(element, includeMargins) {\n // Store the styles so that they can be used by others without asking for it again.\n const styles = window.getComputedStyle(element, null);\n let width = getNumberStyle(element, 'width', styles);\n let height = getNumberStyle(element, 'height', styles);\n\n if (includeMargins) {\n const marginLeft = getNumberStyle(element, 'marginLeft', styles);\n const marginRight = getNumberStyle(element, 'marginRight', styles);\n const marginTop = getNumberStyle(element, 'marginTop', styles);\n const marginBottom = getNumberStyle(element, 'marginBottom', styles);\n width += marginLeft + marginRight;\n height += marginTop + marginBottom;\n }\n\n return {\n width,\n height,\n };\n }\n\n /**\n * Change a property or execute a function which will not have a transition\n * @param {Array.} elements DOM elements that won't be transitioned.\n * @param {Function} callback A function which will be called while transition\n * is set to 0ms.\n * @private\n */\n static _skipTransitions(elements, callback) {\n const zero = '0ms';\n\n // Save current duration and delay.\n const data = elements.map((element) => {\n const style = element.style;\n const duration = style.transitionDuration;\n const delay = style.transitionDelay;\n\n // Set the duration to zero so it happens immediately\n style.transitionDuration = zero;\n style.transitionDelay = zero;\n\n return {\n duration,\n delay,\n };\n });\n\n callback();\n\n // Cause reflow.\n elements[0].offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Put the duration back\n elements.forEach((element, i) => {\n element.style.transitionDuration = data[i].duration;\n element.style.transitionDelay = data[i].delay;\n });\n }\n}\n\nShuffle.ShuffleItem = ShuffleItem;\n\nShuffle.ALL_ITEMS = 'all';\nShuffle.FILTER_ATTRIBUTE_KEY = 'groups';\n\n/**\n * @enum {string}\n */\nShuffle.EventType = {\n LAYOUT: 'shuffle:layout',\n REMOVED: 'shuffle:removed',\n};\n\n/** @enum {string} */\nShuffle.Classes = Classes;\n\n/**\n * @enum {string}\n */\nShuffle.FilterMode = {\n ANY: 'any',\n ALL: 'all',\n};\n\n// Overrideable options\nShuffle.options = {\n // Initial filter group.\n group: Shuffle.ALL_ITEMS,\n\n // Transition/animation speed (milliseconds).\n speed: 250,\n\n // CSS easing function to use.\n easing: 'ease',\n\n // e.g. '.picture-item'.\n itemSelector: '*',\n\n // Element or selector string. Use an element to determine the size of columns\n // and gutters.\n sizer: null,\n\n // A static number or function that tells the plugin how wide the gutters\n // between columns are (in pixels).\n gutterWidth: 0,\n\n // A static number or function that returns a number which tells the plugin\n // how wide the columns are (in pixels).\n columnWidth: 0,\n\n // If your group is not json, and is comma delimeted, you could set delimeter\n // to ','.\n delimeter: null,\n\n // Useful for percentage based heights when they might not always be exactly\n // the same (in pixels).\n buffer: 0,\n\n // Reading the width of elements isn't precise enough and can cause columns to\n // jump between values.\n columnThreshold: 0.01,\n\n // Shuffle can be isInitialized with a sort object. It is the same object\n // given to the sort method.\n initialSort: null,\n\n // By default, shuffle will throttle resize events. This can be changed or\n // removed.\n throttle,\n\n // How often shuffle can be called on resize (in milliseconds).\n throttleTime: 300,\n\n // Transition delay offset for each item in milliseconds.\n staggerAmount: 15,\n\n // Maximum stagger delay in milliseconds.\n staggerAmountMax: 250,\n\n // Whether to use transforms or absolute positioning.\n useTransforms: true,\n\n // Affects using an array with filter. e.g. `filter(['one', 'two'])`. With \"any\",\n // the element passes the test if any of its groups are in the array. With \"all\",\n // the element only passes if all groups are in the array.\n filterMode: Shuffle.FilterMode.ANY,\n};\n\n// Expose for testing. Hack at your own risk.\nShuffle.__Point = Point;\nShuffle.__sorter = sorter;\nShuffle.__getColumnSpan = getColumnSpan;\nShuffle.__getAvailablePositions = getAvailablePositions;\nShuffle.__getShortColumn = getShortColumn;\n\nexport default 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diff --git a/dist/shuffle.min.js b/dist/shuffle.min.js
index 8ab6535..cddc62e 100644
--- a/dist/shuffle.min.js
+++ b/dist/shuffle.min.js
@@ -1,2 +1,2 @@
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this.options.throttle?this.options.throttle(t,this.options.throttleTime):t}},{key:"_getElementOption",value:function(t){return"string"==typeof t?this.element.querySelector(t):t&&t.nodeType&&1===t.nodeType?t:t&&t.jquery?t[0]:null}},{key:"_validateStyles",value:function(t){"static"===t.position&&(this.element.style.position="relative"),"hidden"!==t.overflow&&(this.element.style.overflow="hidden")}},{key:"_filter",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastFilter,e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:this.items,i=this._getFilteredSets(t,e);return this._toggleFilterClasses(i),this.lastFilter=t,"string"==typeof t&&(this.group=t),i}},{key:"_getFilteredSets",value:function(e,i){var n=this,s=[],o=[];return e===t.ALL_ITEMS?s=i:i.forEach(function(t){n._doesPassFilter(e,t.element)?s.push(t):o.push(t)}),{visible:s,hidden:o}}},{key:"_doesPassFilter",value:function(e,i){if("function"==typeof e)return e.call(i,i,this);var n=i.getAttribute("data-"+t.FILTER_ATTRIBUTE_KEY),s=this.options.delimeter?n.split(this.options.delimeter):JSON.parse(n);return Array.isArray(e)?this.options.filterMode!=t.filterMode.EXCLUSIVE?e.every(g(s)):e.some(g(s)):g(s,e)}},{key:"_toggleFilterClasses",value:function(t){var e=t.visible,i=t.hidden;e.forEach(function(t){t.show()}),i.forEach(function(t){t.hide()})}},{key:"_initItems",value:function(){(arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.items).forEach(function(t){t.init()})}},{key:"_disposeItems",value:function(){(arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.items).forEach(function(t){t.dispose()})}},{key:"_updateItemCount",value:function(){this.visibleItems=this._getFilteredItems().length}},{key:"_setTransitions",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.items,e=this.options.speed,i=this.options.easing,n=this.options.useTransforms?"transform "+e+"ms "+i+", opacity "+e+"ms "+i:"top "+e+"ms "+i+", left "+e+"ms "+i+", opacity "+e+"ms "+i;t.forEach(function(t){t.element.style.transition=n})}},{key:"_getItems",value:function(){var t=this;return y(this.element.children).filter(function(e){return b(e,t.options.itemSelector)}).map(function(t){return new V(t)})}},{key:"_updateItemsOrder",value:function(){var t=this.element.children;this.items=l(this.items,{by:function(e){return Array.prototype.indexOf.call(t,e)}})}},{key:"_getFilteredItems",value:function(){return this.items.filter(function(t){return t.isVisible})}},{key:"_getConcealedItems",value:function(){return this.items.filter(function(t){return!t.isVisible})}},{key:"_getColumnSize",value:function(e,i){var n=void 0;return n="function"==typeof this.options.columnWidth?this.options.columnWidth(e):this.useSizer?t.getSize(this.options.sizer).width:this.options.columnWidth?this.options.columnWidth:this.items.length>0?t.getSize(this.items[0].element,!0).width:e,0===n&&(n=e),n+i}},{key:"_getGutterSize",value:function(t){return"function"==typeof this.options.gutterWidth?this.options.gutterWidth(t):this.useSizer?o(this.options.sizer,"marginLeft"):this.options.gutterWidth}},{key:"_setColumns",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:t.getSize(this.element).width,i=this._getGutterSize(e),n=this._getColumnSize(e,i),s=(e+i)/n;Math.abs(Math.round(s)-s)1&&void 0!==arguments[1]?arguments[1]:{};return!this.isDestroyed&&(e.shuffle=this,!this.element.dispatchEvent(new CustomEvent(t,{bubbles:!0,cancelable:!1,detail:e})))}},{key:"_resetCols",value:function(){var t=this.cols;for(this.positions=[];t;)t-=1,this.positions.push(0)}},{key:"_layout",value:function(e){var i=this,n=0;e.forEach(function(e){function s(){e.element.style.transitionDelay="",e.applyCss(V.Css.VISIBLE.after)}var o=e.point,r=e.scale,l=t.getSize(e.element,!0),a=i._getItemPosition(l);if(A.equals(o,a)&&r===V.Scale.VISIBLE)return e.applyCss(V.Css.VISIBLE.before),void s();e.point=a,e.scale=V.Scale.VISIBLE;var u=L(V.Css.VISIBLE.before);u.transitionDelay=i._getStaggerAmount(n)+"ms",i._queue.push({item:e,styles:u,callback:s}),n+=1})}},{key:"_getItemPosition",value:function(t){return p({itemSize:t,positions:this.positions,gridSize:this.colWidth,total:this.cols,threshold:this.options.columnThreshold,buffer:this.options.buffer})}},{key:"_shrink",value:function(){var t=this,e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this._getConcealedItems(),i=0;e.forEach(function(e){function n(){e.applyCss(V.Css.HIDDEN.after)}if(e.scale===V.Scale.HIDDEN)return e.applyCss(V.Css.HIDDEN.before),void n();e.scale=V.Scale.HIDDEN;var s=L(V.Css.HIDDEN.before);s.transitionDelay=t._getStaggerAmount(i)+"ms",t._queue.push({item:e,styles:s,callback:n}),i+=1})}},{key:"_handleResize",value:function(){if(this.isEnabled&&!this.isDestroyed){t.getSize(this.element).width!==this.containerWidth&&this.update()}}},{key:"_getStylesForTransition",value:function(t){var e=t.item,i=t.styles;i.transitionDelay||(i.transitionDelay="0ms");var n=e.point.x,s=e.point.y;return this.options.useTransforms?i.transform="translate("+n+"px, "+s+"px) scale("+e.scale+")":(i.left=n+"px",i.top=s+"px"),i}},{key:"_whenTransitionDone",value:function(t,e,i){var n=h(t,function(t){e(),i(null,t)});this._transitions.push(n)}},{key:"_getTransitionFunction",value:function(t){var e=this;return function(i){t.item.applyCss(e._getStylesForTransition(t)),e._whenTransitionDone(t.item.element,t.callback,i)}}},{key:"_processQueue",value:function(){this.isTransitioning&&this._cancelMovement();var t=this.options.speed>0,e=this._queue.length>0;e&&t&&this.isInitialized?this._startTransitions(this._queue):e?(this._styleImmediately(this._queue),this._dispatchLayout()):this._dispatchLayout(),this._queue.length=0}},{key:"_startTransitions",value:function(t){var e=this;this.isTransitioning=!0;var i=t.map(function(t){return e._getTransitionFunction(t)});D(i,this._movementFinished.bind(this))}},{key:"_cancelMovement",value:function(){this._transitions.forEach(u),this._transitions.length=0,this.isTransitioning=!1}},{key:"_styleImmediately",value:function(e){var i=this;if(e.length){var n=e.map(function(t){return t.item.element});t._skipTransitions(n,function(){e.forEach(function(t){t.item.applyCss(i._getStylesForTransition(t)),t.callback()})})}}},{key:"_movementFinished",value:function(){this._transitions.length=0,this.isTransitioning=!1,this._dispatchLayout()}},{key:"_dispatchLayout",value:function(){this._dispatch(t.EventType.LAYOUT)}},{key:"filter",value:function(e,i){this.isEnabled&&((!e||e&&0===e.length)&&(e=t.ALL_ITEMS),this._filter(e),this._shrink(),this._updateItemCount(),this.sort(i))}},{key:"sort",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastSort;if(this.isEnabled){this._resetCols();var e=this._getFilteredItems();e=l(e,t),this._layout(e),this._processQueue(),this._setContainerSize(),this.lastSort=t}}},{key:"update",value:function(t){this.isEnabled&&(t||this._setColumns(),this.sort())}},{key:"layout",value:function(){this.update(!0)}},{key:"add",value:function(t){var e=T(t).map(function(t){return new V(t)});this._initItems(e),this._setTransitions(e),this.items=this.items.concat(e),this._updateItemsOrder(),this.filter(this.lastFilter)}},{key:"disable",value:function(){this.isEnabled=!1}},{key:"enable",value:function(t){this.isEnabled=!0,!1!==t&&this.update()}},{key:"remove",value:function(e){var i=this;if(e.length){var n=T(e),s=n.map(function(t){return i.getItemByElement(t)}).filter(function(t){return!!t}),o=function e(){i.element.removeEventListener(t.EventType.LAYOUT,e),i._disposeItems(s),n.forEach(function(t){t.parentNode.removeChild(t)}),i._dispatch(t.EventType.REMOVED,{collection:n})};this._toggleFilterClasses({visible:[],hidden:s}),this._shrink(s),this.sort(),this.items=this.items.filter(function(t){return!g(s,t)}),this._updateItemCount(),this.element.addEventListener(t.EventType.LAYOUT,o)}}},{key:"getItemByElement",value:function(t){for(var e=this.items.length-1;e>=0;e--)if(this.items[e].element===t)return this.items[e];return null}},{key:"destroy",value:function(){this._cancelMovement(),window.removeEventListener("resize",this._onResize),this.element.classList.remove("shuffle"),this.element.removeAttribute("style"),this._disposeItems(),this.items=null,this.options.sizer=null,this.element=null,this._transitions=null,this.isDestroyed=!0}}],[{key:"getSize",value:function(t,e){var i=window.getComputedStyle(t,null),n=o(t,"width",i),s=o(t,"height",i);if(e){var r=o(t,"marginLeft",i),l=o(t,"marginRight",i),a=o(t,"marginTop",i),u=o(t,"marginBottom",i);n+=r+l,s+=a+u}return{width:n,height:s}}},{key:"_skipTransitions",value:function(t,e){var i=t.map(function(t){var e=t.style,i=e.transitionDuration,n=e.transitionDelay;return e.transitionDuration="0ms",e.transitionDelay="0ms",{duration:i,delay:n}});e(),t[0].offsetWidth,t.forEach(function(t,e){t.style.transitionDuration=i[e].duration,t.style.transitionDelay=i[e].delay})}}]),t}();return j.ShuffleItem=V,j.ALL_ITEMS="all",j.FILTER_ATTRIBUTE_KEY="groups",j.EventType={LAYOUT:"shuffle:layout",REMOVED:"shuffle:removed"},j.Classes=F,j.filterMode={EXCLUSIVE:"exclusive",ADDITIVE:"additive"},j.options={group:j.ALL_ITEMS,speed:250,easing:"ease",itemSelector:"*",sizer:null,gutterWidth:0,columnWidth:0,delimeter:null,buffer:0,columnThreshold:.01,initialSort:null,throttle:C,throttleTime:300,staggerAmount:15,staggerAmountMax:250,useTransforms:!0,filterMode:j.filterMode.EXCLUSIVE},j.__Point=A,j.__sorter=l,j.__getColumnSpan=d,j.__getAvailablePositions=m,j.__getShortColumn=v,j});
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.shuffle=e()}(this,function(){"use strict";function t(t,e){if(b)return b.call(t,e);for(var i=t.parentNode.querySelectorAll(e),n=0;n=e?i():r=setTimeout(i,e-t)),o}}function n(){}function s(t){return parseFloat(t)||0}function o(t,e){var i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:window.getComputedStyle(t,null),n=s(i[e]);return W||"width"!==e?W||"height"!==e||(n+=s(i.paddingTop)+s(i.paddingBottom)+s(i.borderTopWidth)+s(i.borderBottomWidth)):n+=s(i.paddingLeft)+s(i.paddingRight)+s(i.borderLeftWidth)+s(i.borderRightWidth),n}function r(t){for(var e=t.length;e;){e-=1;var i=Math.floor(Math.random()*(e+1)),n=t[i];t[i]=t[e],t[e]=n}return t}function l(t,e){var i=w(R,e),n=[].slice.call(t),s=!1;return t.length?i.randomize?r(t):("function"==typeof i.by&&t.sort(function(t,e){if(s)return 0;var n=i.by(t[i.key]),o=i.by(e[i.key]);return void 0===n&&void 0===o?(s=!0,0):no||"sortLast"===n||"sortFirst"===o?1:0}),s?n:(i.reverse&&t.reverse(),t)):[]}function a(){return P+=1,q+P}function u(t){return!!H[t]&&(H[t].element.removeEventListener(q,H[t].listener),H[t]=null,!0)}function h(t,e){var i=a(),n=function(t){t.currentTarget===t.target&&(u(i),e(t))};return t.addEventListener(q,n),H[i]={element:t,listener:n},i}function f(t){return Math.max.apply(Math,t)}function c(t){return Math.min.apply(Math,t)}function d(t,e,i,n){var s=t/e;return Math.abs(Math.round(s)-s)=i-e&&t[n]<=i+e)return n;return 0}function p(t){for(var e=t.itemSize,i=t.positions,n=t.gridSize,s=t.total,o=t.threshold,r=t.buffer,l=d(e.width,n,s,o),a=m(i,l,s),u=v(a,r),h=new A(Math.round(n*u),Math.round(a[u])),f=a[u]+e.height,c=0;c-1}try{var _=new window.CustomEvent("test");if(_.preventDefault(),!0!==_.defaultPrevented)throw new Error("Could not prevent default")}catch(t){var E=function(t,e){var i,n;return e=e||{bubbles:!1,cancelable:!1,detail:void 0},i=document.createEvent("CustomEvent"),i.initCustomEvent(t,e.bubbles,e.cancelable,e.detail),n=i.preventDefault,i.preventDefault=function(){n.call(this);try{Object.defineProperty(this,"defaultPrevented",{get:function(){return!0}})}catch(t){this.defaultPrevented=!0}},i};E.prototype=window.Event.prototype,window.CustomEvent=E}var S=Element.prototype,b=S.matches||S.matchesSelector||S.webkitMatchesSelector||S.mozMatchesSelector||S.msMatchesSelector||S.oMatchesSelector,I=t,k="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:{},T=function(t,e){return e={exports:{}},t(e,e.exports),e.exports}(function(t){function e(t){for(var e=[],i=0;i1&&void 0!==arguments[1]?arguments[1]:{};D(this,t),this.options=w(t.options,i),this.useSizer=!1,this.lastSort={},this.group=t.ALL_ITEMS,this.lastFilter=t.ALL_ITEMS,this.isEnabled=!0,this.isDestroyed=!1,this.isInitialized=!1,this._transitions=[],this.isTransitioning=!1,this._queue=[];var n=this._getElementOption(e);if(!n)throw new TypeError("Shuffle needs to be initialized with an element.");this.element=n,this.id="shuffle_"+U,U+=1,this._init(),this.isInitialized=!0}return M(t,[{key:"_init",value:function(){this.items=this._getItems(),this.options.sizer=this._getElementOption(this.options.sizer),this.options.sizer&&(this.useSizer=!0),this.element.classList.add(t.Classes.BASE),this._initItems(),this._onResize=this._getResizeFunction(),window.addEventListener("resize",this._onResize);var e=window.getComputedStyle(this.element,null),i=t.getSize(this.element).width;this._validateStyles(e),this._setColumns(i),this.filter(this.options.group,this.options.initialSort),this.element.offsetWidth,this._setTransitions(),this.element.style.transition="height "+this.options.speed+"ms "+this.options.easing}},{key:"_getResizeFunction",value:function(){var t=this._handleResize.bind(this);return this.options.throttle?this.options.throttle(t,this.options.throttleTime):t}},{key:"_getElementOption",value:function(t){return"string"==typeof t?this.element.querySelector(t):t&&t.nodeType&&1===t.nodeType?t:t&&t.jquery?t[0]:null}},{key:"_validateStyles",value:function(t){"static"===t.position&&(this.element.style.position="relative"),"hidden"!==t.overflow&&(this.element.style.overflow="hidden")}},{key:"_filter",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastFilter,e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:this.items,i=this._getFilteredSets(t,e);return this._toggleFilterClasses(i),this.lastFilter=t,"string"==typeof t&&(this.group=t),i}},{key:"_getFilteredSets",value:function(e,i){var n=this,s=[],o=[];return e===t.ALL_ITEMS?s=i:i.forEach(function(t){n._doesPassFilter(e,t.element)?s.push(t):o.push(t)}),{visible:s,hidden:o}}},{key:"_doesPassFilter",value:function(e,i){function n(t){return g(o,t)}if("function"==typeof e)return e.call(i,i,this);var s=i.getAttribute("data-"+t.FILTER_ATTRIBUTE_KEY),o=this.options.delimeter?s.split(this.options.delimeter):JSON.parse(s);return Array.isArray(e)?this.options.filterMode===t.FilterMode.ANY?e.some(n):e.every(n):g(o,e)}},{key:"_toggleFilterClasses",value:function(t){var e=t.visible,i=t.hidden;e.forEach(function(t){t.show()}),i.forEach(function(t){t.hide()})}},{key:"_initItems",value:function(){(arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.items).forEach(function(t){t.init()})}},{key:"_disposeItems",value:function(){(arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.items).forEach(function(t){t.dispose()})}},{key:"_updateItemCount",value:function(){this.visibleItems=this._getFilteredItems().length}},{key:"_setTransitions",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.items,e=this.options.speed,i=this.options.easing,n=this.options.useTransforms?"transform "+e+"ms "+i+", opacity "+e+"ms "+i:"top "+e+"ms "+i+", left "+e+"ms "+i+", opacity "+e+"ms "+i;t.forEach(function(t){t.element.style.transition=n})}},{key:"_getItems",value:function(){var t=this;return y(this.element.children).filter(function(e){return I(e,t.options.itemSelector)}).map(function(t){return new B(t)})}},{key:"_updateItemsOrder",value:function(){var t=this.element.children;this.items=l(this.items,{by:function(e){return Array.prototype.indexOf.call(t,e)}})}},{key:"_getFilteredItems",value:function(){return this.items.filter(function(t){return t.isVisible})}},{key:"_getConcealedItems",value:function(){return this.items.filter(function(t){return!t.isVisible})}},{key:"_getColumnSize",value:function(e,i){var n=void 0;return n="function"==typeof this.options.columnWidth?this.options.columnWidth(e):this.useSizer?t.getSize(this.options.sizer).width:this.options.columnWidth?this.options.columnWidth:this.items.length>0?t.getSize(this.items[0].element,!0).width:e,0===n&&(n=e),n+i}},{key:"_getGutterSize",value:function(t){return"function"==typeof this.options.gutterWidth?this.options.gutterWidth(t):this.useSizer?o(this.options.sizer,"marginLeft"):this.options.gutterWidth}},{key:"_setColumns",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:t.getSize(this.element).width,i=this._getGutterSize(e),n=this._getColumnSize(e,i),s=(e+i)/n;Math.abs(Math.round(s)-s)1&&void 0!==arguments[1]?arguments[1]:{};return!this.isDestroyed&&(e.shuffle=this,!this.element.dispatchEvent(new CustomEvent(t,{bubbles:!0,cancelable:!1,detail:e})))}},{key:"_resetCols",value:function(){var t=this.cols;for(this.positions=[];t;)t-=1,this.positions.push(0)}},{key:"_layout",value:function(e){var i=this,n=0;e.forEach(function(e){function s(){e.element.style.transitionDelay="",e.applyCss(B.Css.VISIBLE.after)}var o=e.point,r=e.scale,l=t.getSize(e.element,!0),a=i._getItemPosition(l);if(A.equals(o,a)&&r===B.Scale.VISIBLE)return e.applyCss(B.Css.VISIBLE.before),void s();e.point=a,e.scale=B.Scale.VISIBLE;var u=w(B.Css.VISIBLE.before);u.transitionDelay=i._getStaggerAmount(n)+"ms",i._queue.push({item:e,styles:u,callback:s}),n+=1})}},{key:"_getItemPosition",value:function(t){return p({itemSize:t,positions:this.positions,gridSize:this.colWidth,total:this.cols,threshold:this.options.columnThreshold,buffer:this.options.buffer})}},{key:"_shrink",value:function(){var t=this,e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this._getConcealedItems(),i=0;e.forEach(function(e){function n(){e.applyCss(B.Css.HIDDEN.after)}if(e.scale===B.Scale.HIDDEN)return e.applyCss(B.Css.HIDDEN.before),void n();e.scale=B.Scale.HIDDEN;var s=w(B.Css.HIDDEN.before);s.transitionDelay=t._getStaggerAmount(i)+"ms",t._queue.push({item:e,styles:s,callback:n}),i+=1})}},{key:"_handleResize",value:function(){if(this.isEnabled&&!this.isDestroyed){t.getSize(this.element).width!==this.containerWidth&&this.update()}}},{key:"_getStylesForTransition",value:function(t){var e=t.item,i=t.styles;i.transitionDelay||(i.transitionDelay="0ms");var n=e.point.x,s=e.point.y;return this.options.useTransforms?i.transform="translate("+n+"px, "+s+"px) scale("+e.scale+")":(i.left=n+"px",i.top=s+"px"),i}},{key:"_whenTransitionDone",value:function(t,e,i){var n=h(t,function(t){e(),i(null,t)});this._transitions.push(n)}},{key:"_getTransitionFunction",value:function(t){var e=this;return function(i){t.item.applyCss(e._getStylesForTransition(t)),e._whenTransitionDone(t.item.element,t.callback,i)}}},{key:"_processQueue",value:function(){this.isTransitioning&&this._cancelMovement();var t=this.options.speed>0,e=this._queue.length>0;e&&t&&this.isInitialized?this._startTransitions(this._queue):e?(this._styleImmediately(this._queue),this._dispatchLayout()):this._dispatchLayout(),this._queue.length=0}},{key:"_startTransitions",value:function(t){var e=this;this.isTransitioning=!0;var i=t.map(function(t){return e._getTransitionFunction(t)});z(i,this._movementFinished.bind(this))}},{key:"_cancelMovement",value:function(){this._transitions.forEach(u),this._transitions.length=0,this.isTransitioning=!1}},{key:"_styleImmediately",value:function(e){var i=this;if(e.length){var n=e.map(function(t){return t.item.element});t._skipTransitions(n,function(){e.forEach(function(t){t.item.applyCss(i._getStylesForTransition(t)),t.callback()})})}}},{key:"_movementFinished",value:function(){this._transitions.length=0,this.isTransitioning=!1,this._dispatchLayout()}},{key:"_dispatchLayout",value:function(){this._dispatch(t.EventType.LAYOUT)}},{key:"filter",value:function(e,i){this.isEnabled&&((!e||e&&0===e.length)&&(e=t.ALL_ITEMS),this._filter(e),this._shrink(),this._updateItemCount(),this.sort(i))}},{key:"sort",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastSort;if(this.isEnabled){this._resetCols();var e=this._getFilteredItems();e=l(e,t),this._layout(e),this._processQueue(),this._setContainerSize(),this.lastSort=t}}},{key:"update",value:function(t){this.isEnabled&&(t||this._setColumns(),this.sort())}},{key:"layout",value:function(){this.update(!0)}},{key:"add",value:function(t){var e=T(t).map(function(t){return new B(t)});this._initItems(e),this._setTransitions(e),this.items=this.items.concat(e),this._updateItemsOrder(),this.filter(this.lastFilter)}},{key:"disable",value:function(){this.isEnabled=!1}},{key:"enable",value:function(t){this.isEnabled=!0,!1!==t&&this.update()}},{key:"remove",value:function(e){var i=this;if(e.length){var n=T(e),s=n.map(function(t){return i.getItemByElement(t)}).filter(function(t){return!!t}),o=function e(){i.element.removeEventListener(t.EventType.LAYOUT,e),i._disposeItems(s),n.forEach(function(t){t.parentNode.removeChild(t)}),i._dispatch(t.EventType.REMOVED,{collection:n})};this._toggleFilterClasses({visible:[],hidden:s}),this._shrink(s),this.sort(),this.items=this.items.filter(function(t){return!g(s,t)}),this._updateItemCount(),this.element.addEventListener(t.EventType.LAYOUT,o)}}},{key:"getItemByElement",value:function(t){for(var e=this.items.length-1;e>=0;e--)if(this.items[e].element===t)return this.items[e];return null}},{key:"destroy",value:function(){this._cancelMovement(),window.removeEventListener("resize",this._onResize),this.element.classList.remove("shuffle"),this.element.removeAttribute("style"),this._disposeItems(),this.items=null,this.options.sizer=null,this.element=null,this._transitions=null,this.isDestroyed=!0}}],[{key:"getSize",value:function(t,e){var i=window.getComputedStyle(t,null),n=o(t,"width",i),s=o(t,"height",i);if(e){var r=o(t,"marginLeft",i),l=o(t,"marginRight",i),a=o(t,"marginTop",i),u=o(t,"marginBottom",i);n+=r+l,s+=a+u}return{width:n,height:s}}},{key:"_skipTransitions",value:function(t,e){var i=t.map(function(t){var e=t.style,i=e.transitionDuration,n=e.transitionDelay;return e.transitionDuration="0ms",e.transitionDelay="0ms",{duration:i,delay:n}});e(),t[0].offsetWidth,t.forEach(function(t,e){t.style.transitionDuration=i[e].duration,t.style.transitionDelay=i[e].delay})}}]),t}();return Y.ShuffleItem=B,Y.ALL_ITEMS="all",Y.FILTER_ATTRIBUTE_KEY="groups",Y.EventType={LAYOUT:"shuffle:layout",REMOVED:"shuffle:removed"},Y.Classes=F,Y.FilterMode={ANY:"any",ALL:"all"},Y.options={group:Y.ALL_ITEMS,speed:250,easing:"ease",itemSelector:"*",sizer:null,gutterWidth:0,columnWidth:0,delimeter:null,buffer:0,columnThreshold:.01,initialSort:null,throttle:C,throttleTime:300,staggerAmount:15,staggerAmountMax:250,useTransforms:!0,filterMode:Y.FilterMode.ANY},Y.__Point=A,Y.__sorter=l,Y.__getColumnSpan=d,Y.__getAvailablePositions=m,Y.__getShortColumn=v,Y});
//# sourceMappingURL=shuffle.min.js.map
diff --git a/dist/shuffle.min.js.map b/dist/shuffle.min.js.map
index 25a2331..c7970f7 100644
--- a/dist/shuffle.min.js.map
+++ b/dist/shuffle.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"shuffle.min.js","sources":["../node_modules/matches-selector/index.js","../node_modules/xtend/immutable.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/array-min.js","../src/layout.js","../src/shuffle.js","../node_modules/custom-event-polyfill/custom-event-polyfill.js","../node_modules/array-uniq/index.js","../src/point.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js"],"sourcesContent":["'use strict';\n\nvar proto = Element.prototype;\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}","module.exports = extend\n\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction extend() {\n var target = {}\n\n for (var i = 0; i < arguments.length; i++) {\n var source = arguments[i]\n\n for (var key in source) {\n if (hasOwnProperty.call(source, key)) {\n target[key] = source[key]\n }\n }\n }\n\n return target\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\nimport COMPUTED_SIZE_INCLUDES_PADDING from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(element, style,\n styles = window.getComputedStyle(element, null)) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'width') {\n value += getNumber(styles.paddingLeft) +\n getNumber(styles.paddingRight) +\n getNumber(styles.borderLeftWidth) +\n getNumber(styles.borderRightWidth);\n } else if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'height') {\n value += getNumber(styles.paddingTop) +\n getNumber(styles.paddingBottom) +\n getNumber(styles.borderTopWidth) +\n getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","import xtend from 'xtend';\n\n/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\n const opts = xtend(defaults, options);\n const original = [].slice.call(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 0]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 0]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({ itemSize, positions, gridSize, total, threshold, buffer }) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(\n Math.round(gridSize * shortColumnIndex),\n Math.round(setY[shortColumnIndex]));\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n","import 'custom-event-polyfill';\nimport matches from 'matches-selector';\nimport arrayUnique from 'array-uniq';\nimport xtend from 'xtend';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\nimport Point from './point';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport { getItemPosition, getColumnSpan, getAvailablePositions, getShortColumn } from './layout';\nimport arrayMax from './array-max';\n\nfunction toArray(arrayLike) {\n return Array.prototype.slice.call(arrayLike);\n}\n\nfunction arrayIncludes(array, obj) {\n if (arguments.length === 2) {\n return arrayIncludes(array)(obj);\n }\n\n return obj => array.indexOf(obj) > -1;\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle {\n\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n this.options = xtend(Shuffle.options, options);\n\n this.useSizer = false;\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n if (this.options.sizer) {\n this.useSizer = true;\n }\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems();\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this._setTransitions();\n this.element.style.transition = 'height ' + this.options.speed + 'ms ' + this.options.easing;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {Function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle ?\n this.options.throttle(resizeFunction, this.options.throttleTime) :\n resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n\n // Check for an element\n } else if (option && option.nodeType && option.nodeType === 1) {\n return option;\n\n // Check for jQuery object\n } else if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string} [category] Category to filter by. If it's given, the last\n * category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|Function} category Category or function to filter by.\n * @param {Array.} items A collection of items to filter.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|Function} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n\n // Check each element's data-groups attribute against the given category.\n }\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimeter ?\n attr.split(this.options.delimeter) :\n JSON.parse(attr);\n\n if (Array.isArray(category)) {\n if(this.options.filterMode!=Shuffle.filterMode.EXCLUSIVE){\n return category.every(arrayIncludes(keys));\n } else {\n return category.some(arrayIncludes(keys));\n }\n }\n\n return arrayIncludes(keys, category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {Array.} [items] Optionally specifiy at set to initialize.\n * @private\n */\n _initItems(items = this.items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @private\n */\n _disposeItems(items = this.items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of Shuffle.\n * @param {Array.} items Shuffle items to set transitions on.\n * @private\n */\n _setTransitions(items = this.items) {\n const speed = this.options.speed;\n const easing = this.options.easing;\n\n const str = this.options.useTransforms ?\n `transform ${speed}ms ${easing}, opacity ${speed}ms ${easing}` :\n `top ${speed}ms ${easing}, left ${speed}ms ${easing}, opacity ${speed}ms ${easing}`;\n\n items.forEach((item) => {\n item.element.style.transition = str;\n });\n }\n\n _getItems() {\n return toArray(this.element.children)\n .filter(el => matches(el, this.options.itemSelector))\n .map(el => new ShuffleItem(el));\n }\n\n /**\n * When new elements are added to the shuffle container, update the array of\n * items because that is the order `_layout` calls them.\n */\n _updateItemsOrder() {\n const children = this.element.children;\n this.items = sorter(this.items, {\n by(element) {\n return Array.prototype.indexOf.call(children, element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter(item => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter(item => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.useSizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.useSizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns) <\n this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * @return {boolean} Whether the event was prevented or not.\n */\n _dispatch(name, details = {}) {\n if (this.isDestroyed) {\n return false;\n }\n\n details.shuffle = this;\n return !this.element.dispatchEvent(new CustomEvent(name, {\n bubbles: true,\n cancelable: false,\n detail: details,\n }));\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {Array.} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n let count = 0;\n items.forEach((item) => {\n const currPos = item.point;\n const currScale = item.scale;\n const itemSize = Shuffle.getSize(item.element, true);\n const pos = this._getItemPosition(itemSize);\n\n function callback() {\n item.element.style.transitionDelay = '';\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(currPos, pos) && currScale === ShuffleItem.Scale.VISIBLE) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = pos;\n item.scale = ShuffleItem.Scale.VISIBLE;\n\n // Use xtend here to clone the object so that the `before` object isn't\n // modified when the transition delay is added.\n const styles = xtend(ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {Array.} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.scale === ShuffleItem.Scale.HIDDEN) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n\n const styles = xtend(ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n // Will need to check height in the future if it's layed out horizontaly\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // containerWidth hasn't changed, don't do anything\n if (containerWidth === this.containerWidth) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {Object} obj Transition options.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @private\n */\n _getStylesForTransition({ item, styles }) {\n if (!styles.transitionDelay) {\n styles.transitionDelay = '0ms';\n }\n\n const x = item.point.x;\n const y = item.point.y;\n\n if (this.options.useTransforms) {\n styles.transform = `translate(${x}px, ${y}px) scale(${item.scale})`;\n } else {\n styles.left = x + 'px';\n styles.top = y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {Function} itemCallback Callback for the item.\n * @param {Function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {Function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(this._getStylesForTransition(opts));\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatchLayout();\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatchLayout();\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Array.} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map(obj => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Array.} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map(obj => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(this._getStylesForTransition(obj));\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatchLayout();\n }\n\n _dispatchLayout() {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|Function|Array.} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} opts the options object for the sorted plugin\n */\n sort(opts = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n let items = this._getFilteredItems();\n items = sorter(items, opts);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = opts;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} isOnlyLayout If true, column and gutter widths won't be\n * recalculated.\n */\n update(isOnlyLayout) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Array.} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map(el => new ShuffleItem(el));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Add transition to each item.\n this._setTransitions(items);\n\n // Update the list of items.\n this.items = this.items.concat(items);\n this._updateItemsOrder();\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout) {\n this.isEnabled = true;\n if (isUpdateLayout !== false) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items\n * @param {Array.} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle object\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map(element => this.getItemByElement(element))\n .filter(item => !!item);\n\n const handleLayout = () => {\n this.element.removeEventListener(Shuffle.EventType.LAYOUT, handleLayout);\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter(item => !arrayIncludes(oldItems, item));\n this._updateItemCount();\n\n this.element.addEventListener(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or null if it's not found.\n */\n getItemByElement(element) {\n for (let i = this.items.length - 1; i >= 0; i--) {\n if (this.items[i].element === element) {\n return this.items[i];\n }\n }\n\n return null;\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems();\n\n // Null DOM references\n this.items = null;\n this.options.sizer = null;\n this.element = null;\n this._transitions = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. The `offsetWidth` property.\n * - This value stays the same regardless of the elements transform property,\n * however, it does not return subpixel values.\n * 3. getComputedStyle()\n * - This works great Chrome, Firefox, Safari, but IE<=11 does not include\n * padding and border when box-sizing: border-box is set, requiring a feature\n * test and extra work to add the padding back for IE and other browsers which\n * follow the W3C spec here.\n *\n * @param {Element} element The element.\n * @param {boolean} [includeMargins] Whether to include margins. Default is false.\n * @return {{width: number, height: number}} The width and height.\n */\n static getSize(element, includeMargins) {\n // Store the styles so that they can be used by others without asking for it again.\n const styles = window.getComputedStyle(element, null);\n let width = getNumberStyle(element, 'width', styles);\n let height = getNumberStyle(element, 'height', styles);\n\n if (includeMargins) {\n const marginLeft = getNumberStyle(element, 'marginLeft', styles);\n const marginRight = getNumberStyle(element, 'marginRight', styles);\n const marginTop = getNumberStyle(element, 'marginTop', styles);\n const marginBottom = getNumberStyle(element, 'marginBottom', styles);\n width += marginLeft + marginRight;\n height += marginTop + marginBottom;\n }\n\n return {\n width,\n height,\n };\n }\n\n /**\n * Change a property or execute a function which will not have a transition\n * @param {Array.} elements DOM elements that won't be transitioned.\n * @param {Function} callback A function which will be called while transition\n * is set to 0ms.\n * @private\n */\n static _skipTransitions(elements, callback) {\n const zero = '0ms';\n\n // Save current duration and delay.\n const data = elements.map((element) => {\n const style = element.style;\n const duration = style.transitionDuration;\n const delay = style.transitionDelay;\n\n // Set the duration to zero so it happens immediately\n style.transitionDuration = zero;\n style.transitionDelay = zero;\n\n return {\n duration,\n delay,\n };\n });\n\n callback();\n\n // Cause reflow.\n elements[0].offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Put the duration back\n elements.forEach((element, i) => {\n element.style.transitionDuration = data[i].duration;\n element.style.transitionDelay = data[i].delay;\n });\n }\n}\n\nShuffle.ShuffleItem = ShuffleItem;\n\nShuffle.ALL_ITEMS = 'all';\nShuffle.FILTER_ATTRIBUTE_KEY = 'groups';\n\n/**\n * @enum {string}\n */\nShuffle.EventType = {\n LAYOUT: 'shuffle:layout',\n REMOVED: 'shuffle:removed',\n};\n\n/** @enum {string} */\nShuffle.Classes = Classes;\n\n/**\n * @enum {string}\n */\nShuffle.filterMode = {\n EXCLUSIVE: 'exclusive',\n ADDITIVE: 'additive',\n};\n\n// Overrideable options\nShuffle.options = {\n // Initial filter group.\n group: Shuffle.ALL_ITEMS,\n\n // Transition/animation speed (milliseconds).\n speed: 250,\n\n // CSS easing function to use.\n easing: 'ease',\n\n // e.g. '.picture-item'.\n itemSelector: '*',\n\n // Element or selector string. Use an element to determine the size of columns\n // and gutters.\n sizer: null,\n\n // A static number or function that tells the plugin how wide the gutters\n // between columns are (in pixels).\n gutterWidth: 0,\n\n // A static number or function that returns a number which tells the plugin\n // how wide the columns are (in pixels).\n columnWidth: 0,\n\n // If your group is not json, and is comma delimeted, you could set delimeter\n // to ','.\n delimeter: null,\n\n // Useful for percentage based heights when they might not always be exactly\n // the same (in pixels).\n buffer: 0,\n\n // Reading the width of elements isn't precise enough and can cause columns to\n // jump between values.\n columnThreshold: 0.01,\n\n // Shuffle can be isInitialized with a sort object. It is the same object\n // given to the sort method.\n initialSort: null,\n\n // By default, shuffle will throttle resize events. This can be changed or\n // removed.\n throttle,\n\n // How often shuffle can be called on resize (in milliseconds).\n throttleTime: 300,\n\n // Transition delay offset for each item in milliseconds.\n staggerAmount: 15,\n\n // Maximum stagger delay in milliseconds.\n staggerAmountMax: 250,\n\n // Whether to use transforms or absolute positioning.\n useTransforms: true,\n\n // Filters elements with \"some\" when 'exclusive' and with every on 'additive'\n filterMode : Shuffle.filterMode.EXCLUSIVE,\n};\n\n// Expose for testing. Hack at your own risk.\nShuffle.__Point = Point;\nShuffle.__sorter = sorter;\nShuffle.__getColumnSpan = getColumnSpan;\nShuffle.__getAvailablePositions = getAvailablePositions;\nShuffle.__getShortColumn = getShortColumn;\n\nexport default Shuffle;\n","// Polyfill for creating CustomEvents on IE9/10/11\n\n// code pulled from:\n// https://github.com/d4tocchini/customevent-polyfill\n// https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent#Polyfill\n\ntry {\n var ce = new window.CustomEvent('test');\n ce.preventDefault();\n if (ce.defaultPrevented !== true) {\n // IE has problems with .preventDefault() on custom events\n // http://stackoverflow.com/questions/23349191\n throw new Error('Could not prevent default');\n }\n} catch(e) {\n var CustomEvent = function(event, params) {\n var evt, origPrevent;\n params = params || {\n bubbles: false,\n cancelable: false,\n detail: undefined\n };\n\n evt = document.createEvent(\"CustomEvent\");\n evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);\n origPrevent = evt.preventDefault;\n evt.preventDefault = function () {\n origPrevent.call(this);\n try {\n Object.defineProperty(this, 'defaultPrevented', {\n get: function () {\n return true;\n }\n });\n } catch(e) {\n this.defaultPrevented = true;\n }\n };\n return evt;\n };\n\n CustomEvent.prototype = window.Event.prototype;\n window.CustomEvent = CustomEvent; // expose definition to window\n}\n","'use strict';\n\n// there's 3 implementations written in increasing order of efficiency\n\n// 1 - no Set type is defined\nfunction uniqNoSet(arr) {\n\tvar ret = [];\n\n\tfor (var i = 0; i < arr.length; i++) {\n\t\tif (ret.indexOf(arr[i]) === -1) {\n\t\t\tret.push(arr[i]);\n\t\t}\n\t}\n\n\treturn ret;\n}\n\n// 2 - a simple Set type is defined\nfunction uniqSet(arr) {\n\tvar seen = new Set();\n\treturn arr.filter(function (el) {\n\t\tif (!seen.has(el)) {\n\t\t\tseen.add(el);\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t});\n}\n\n// 3 - a standard 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\ No newline at end of file
+{"version":3,"file":"shuffle.min.js","sources":["../node_modules/matches-selector/index.js","../node_modules/xtend/immutable.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/array-min.js","../src/layout.js","../src/shuffle.js","../node_modules/custom-event-polyfill/custom-event-polyfill.js","../node_modules/array-uniq/index.js","../src/point.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js"],"sourcesContent":["'use strict';\n\nvar proto = Element.prototype;\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}","module.exports = extend\n\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction extend() {\n var target = {}\n\n for (var i = 0; i < arguments.length; i++) {\n var source = arguments[i]\n\n for (var key in source) {\n if (hasOwnProperty.call(source, key)) {\n target[key] = source[key]\n }\n }\n }\n\n return target\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\nimport COMPUTED_SIZE_INCLUDES_PADDING from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(element, style,\n styles = window.getComputedStyle(element, null)) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'width') {\n value += getNumber(styles.paddingLeft) +\n getNumber(styles.paddingRight) +\n getNumber(styles.borderLeftWidth) +\n getNumber(styles.borderRightWidth);\n } else if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'height') {\n value += getNumber(styles.paddingTop) +\n getNumber(styles.paddingBottom) +\n getNumber(styles.borderTopWidth) +\n getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","import xtend from 'xtend';\n\n/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\n const opts = xtend(defaults, options);\n const original = [].slice.call(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 0]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 0]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({ itemSize, positions, gridSize, total, threshold, buffer }) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(\n Math.round(gridSize * shortColumnIndex),\n Math.round(setY[shortColumnIndex]));\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n","import 'custom-event-polyfill';\nimport matches from 'matches-selector';\nimport arrayUnique from 'array-uniq';\nimport xtend from 'xtend';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\nimport Point from './point';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport { getItemPosition, getColumnSpan, getAvailablePositions, getShortColumn } from './layout';\nimport arrayMax from './array-max';\n\nfunction toArray(arrayLike) {\n return Array.prototype.slice.call(arrayLike);\n}\n\nfunction arrayIncludes(array, obj) {\n return array.indexOf(obj) > -1;\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle {\n\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n this.options = xtend(Shuffle.options, options);\n\n this.useSizer = false;\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n if (this.options.sizer) {\n this.useSizer = true;\n }\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems();\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this._setTransitions();\n this.element.style.transition = 'height ' + this.options.speed + 'ms ' + this.options.easing;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {Function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle ?\n this.options.throttle(resizeFunction, this.options.throttleTime) :\n resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n\n // Check for an element\n } else if (option && option.nodeType && option.nodeType === 1) {\n return option;\n\n // Check for jQuery object\n } else if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string} [category] Category to filter by. If it's given, the last\n * category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|Function} category Category or function to filter by.\n * @param {Array.} items A collection of items to filter.\n * @return {!{visible: Array, hidden: Array}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|Function} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimeter ?\n attr.split(this.options.delimeter) :\n JSON.parse(attr);\n\n function testCategory(category) {\n return arrayIncludes(keys, category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return arrayIncludes(keys, category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {Array.} [items] Optionally specifiy at set to initialize.\n * @private\n */\n _initItems(items = this.items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @private\n */\n _disposeItems(items = this.items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of Shuffle.\n * @param {Array.} items Shuffle items to set transitions on.\n * @private\n */\n _setTransitions(items = this.items) {\n const speed = this.options.speed;\n const easing = this.options.easing;\n\n const str = this.options.useTransforms ?\n `transform ${speed}ms ${easing}, opacity ${speed}ms ${easing}` :\n `top ${speed}ms ${easing}, left ${speed}ms ${easing}, opacity ${speed}ms ${easing}`;\n\n items.forEach((item) => {\n item.element.style.transition = str;\n });\n }\n\n _getItems() {\n return toArray(this.element.children)\n .filter(el => matches(el, this.options.itemSelector))\n .map(el => new ShuffleItem(el));\n }\n\n /**\n * When new elements are added to the shuffle container, update the array of\n * items because that is the order `_layout` calls them.\n */\n _updateItemsOrder() {\n const children = this.element.children;\n this.items = sorter(this.items, {\n by(element) {\n return Array.prototype.indexOf.call(children, element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter(item => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter(item => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.useSizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.useSizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns) <\n this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * @return {boolean} Whether the event was prevented or not.\n */\n _dispatch(name, details = {}) {\n if (this.isDestroyed) {\n return false;\n }\n\n details.shuffle = this;\n return !this.element.dispatchEvent(new CustomEvent(name, {\n bubbles: true,\n cancelable: false,\n detail: details,\n }));\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {Array.} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n let count = 0;\n items.forEach((item) => {\n const currPos = item.point;\n const currScale = item.scale;\n const itemSize = Shuffle.getSize(item.element, true);\n const pos = this._getItemPosition(itemSize);\n\n function callback() {\n item.element.style.transitionDelay = '';\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(currPos, pos) && currScale === ShuffleItem.Scale.VISIBLE) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = pos;\n item.scale = ShuffleItem.Scale.VISIBLE;\n\n // Use xtend here to clone the object so that the `before` object isn't\n // modified when the transition delay is added.\n const styles = xtend(ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {Array.} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.scale === ShuffleItem.Scale.HIDDEN) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n\n const styles = xtend(ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n // Will need to check height in the future if it's layed out horizontaly\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // containerWidth hasn't changed, don't do anything\n if (containerWidth === this.containerWidth) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {Object} obj Transition options.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @private\n */\n _getStylesForTransition({ item, styles }) {\n if (!styles.transitionDelay) {\n styles.transitionDelay = '0ms';\n }\n\n const x = item.point.x;\n const y = item.point.y;\n\n if (this.options.useTransforms) {\n styles.transform = `translate(${x}px, ${y}px) scale(${item.scale})`;\n } else {\n styles.left = x + 'px';\n styles.top = y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {Function} itemCallback Callback for the item.\n * @param {Function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {Function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(this._getStylesForTransition(opts));\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatchLayout();\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatchLayout();\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Array.} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map(obj => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Array.} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map(obj => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(this._getStylesForTransition(obj));\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatchLayout();\n }\n\n _dispatchLayout() {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|Function|Array.} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} opts the options object for the sorted plugin\n */\n sort(opts = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n let items = this._getFilteredItems();\n items = sorter(items, opts);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = opts;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} isOnlyLayout If true, column and gutter widths won't be\n * recalculated.\n */\n update(isOnlyLayout) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Array.} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map(el => new ShuffleItem(el));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Add transition to each item.\n this._setTransitions(items);\n\n // Update the list of items.\n this.items = this.items.concat(items);\n this._updateItemsOrder();\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout) {\n this.isEnabled = true;\n if (isUpdateLayout !== false) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items\n * @param {Array.} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle object\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map(element => this.getItemByElement(element))\n .filter(item => !!item);\n\n const handleLayout = () => {\n this.element.removeEventListener(Shuffle.EventType.LAYOUT, handleLayout);\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter(item => !arrayIncludes(oldItems, item));\n this._updateItemCount();\n\n this.element.addEventListener(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or null if it's not found.\n */\n getItemByElement(element) {\n for (let i = this.items.length - 1; i >= 0; i--) {\n if (this.items[i].element === element) {\n return this.items[i];\n }\n }\n\n return null;\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems();\n\n // Null DOM references\n this.items = null;\n this.options.sizer = null;\n this.element = null;\n this._transitions = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. The `offsetWidth` property.\n * - This value stays the same regardless of the elements transform property,\n * however, it does not return subpixel values.\n * 3. getComputedStyle()\n * - This works great Chrome, Firefox, Safari, but IE<=11 does not include\n * padding and border when box-sizing: border-box is set, requiring a feature\n * test and extra work to add the padding back for IE and other browsers which\n * follow the W3C spec here.\n *\n * @param {Element} element The element.\n * @param {boolean} [includeMargins] Whether to include margins. Default is false.\n * @return {{width: number, height: number}} The width and height.\n */\n static getSize(element, includeMargins) {\n // Store the styles so that they can be used by others without asking for it again.\n const styles = window.getComputedStyle(element, null);\n let width = getNumberStyle(element, 'width', styles);\n let height = getNumberStyle(element, 'height', styles);\n\n if (includeMargins) {\n const marginLeft = getNumberStyle(element, 'marginLeft', styles);\n const marginRight = getNumberStyle(element, 'marginRight', styles);\n const marginTop = getNumberStyle(element, 'marginTop', styles);\n const marginBottom = getNumberStyle(element, 'marginBottom', styles);\n width += marginLeft + marginRight;\n height += marginTop + marginBottom;\n }\n\n return {\n width,\n height,\n };\n }\n\n /**\n * Change a property or execute a function which will not have a transition\n * @param {Array.} elements DOM elements that won't be transitioned.\n * @param {Function} callback A function which will be called while transition\n * is set to 0ms.\n * @private\n */\n static _skipTransitions(elements, callback) {\n const zero = '0ms';\n\n // Save current duration and delay.\n const data = elements.map((element) => {\n const style = element.style;\n const duration = style.transitionDuration;\n const delay = style.transitionDelay;\n\n // Set the duration to zero so it happens immediately\n style.transitionDuration = zero;\n style.transitionDelay = zero;\n\n return {\n duration,\n delay,\n };\n });\n\n callback();\n\n // Cause reflow.\n elements[0].offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Put the duration back\n elements.forEach((element, i) => {\n element.style.transitionDuration = data[i].duration;\n element.style.transitionDelay = data[i].delay;\n });\n }\n}\n\nShuffle.ShuffleItem = ShuffleItem;\n\nShuffle.ALL_ITEMS = 'all';\nShuffle.FILTER_ATTRIBUTE_KEY = 'groups';\n\n/**\n * @enum {string}\n */\nShuffle.EventType = {\n LAYOUT: 'shuffle:layout',\n REMOVED: 'shuffle:removed',\n};\n\n/** @enum {string} */\nShuffle.Classes = Classes;\n\n/**\n * @enum {string}\n */\nShuffle.FilterMode = {\n ANY: 'any',\n ALL: 'all',\n};\n\n// Overrideable options\nShuffle.options = {\n // Initial filter group.\n group: Shuffle.ALL_ITEMS,\n\n // Transition/animation speed (milliseconds).\n speed: 250,\n\n // CSS easing function to use.\n easing: 'ease',\n\n // e.g. '.picture-item'.\n itemSelector: '*',\n\n // Element or selector string. Use an element to determine the size of columns\n // and gutters.\n sizer: null,\n\n // A static number or function that tells the plugin how wide the gutters\n // between columns are (in pixels).\n gutterWidth: 0,\n\n // A static number or function that returns a number which tells the plugin\n // how wide the columns are (in pixels).\n columnWidth: 0,\n\n // If your group is not json, and is comma delimeted, you could set delimeter\n // to ','.\n delimeter: null,\n\n // Useful for percentage based heights when they might not always be exactly\n // the same (in pixels).\n buffer: 0,\n\n // Reading the width of elements isn't precise enough and can cause columns to\n // jump between values.\n columnThreshold: 0.01,\n\n // Shuffle can be isInitialized with a sort object. It is the same object\n // given to the sort method.\n initialSort: null,\n\n // By default, shuffle will throttle resize events. This can be changed or\n // removed.\n throttle,\n\n // How often shuffle can be called on resize (in milliseconds).\n throttleTime: 300,\n\n // Transition delay offset for each item in milliseconds.\n staggerAmount: 15,\n\n // Maximum stagger delay in milliseconds.\n staggerAmountMax: 250,\n\n // Whether to use transforms or absolute positioning.\n useTransforms: true,\n\n // Affects using an array with filter. e.g. `filter(['one', 'two'])`. With \"any\",\n // the element passes the test if any of its groups are in the array. With \"all\",\n // the element only passes if all groups are in the array.\n filterMode: Shuffle.FilterMode.ANY,\n};\n\n// Expose for testing. Hack at your own risk.\nShuffle.__Point = Point;\nShuffle.__sorter = sorter;\nShuffle.__getColumnSpan = getColumnSpan;\nShuffle.__getAvailablePositions = getAvailablePositions;\nShuffle.__getShortColumn = getShortColumn;\n\nexport default Shuffle;\n","// Polyfill for creating CustomEvents on IE9/10/11\n\n// code pulled from:\n// https://github.com/d4tocchini/customevent-polyfill\n// https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent#Polyfill\n\ntry {\n var ce = new window.CustomEvent('test');\n ce.preventDefault();\n if (ce.defaultPrevented !== true) {\n // IE has problems with .preventDefault() on custom events\n // http://stackoverflow.com/questions/23349191\n throw new Error('Could not prevent default');\n }\n} catch(e) {\n var CustomEvent = function(event, params) {\n var evt, origPrevent;\n params = params || {\n bubbles: false,\n cancelable: false,\n detail: undefined\n };\n\n evt = document.createEvent(\"CustomEvent\");\n evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);\n origPrevent = evt.preventDefault;\n evt.preventDefault = function () {\n origPrevent.call(this);\n try {\n Object.defineProperty(this, 'defaultPrevented', {\n get: function () {\n return true;\n }\n });\n } catch(e) {\n this.defaultPrevented = true;\n }\n };\n return evt;\n };\n\n CustomEvent.prototype = window.Event.prototype;\n window.CustomEvent = CustomEvent; // expose definition to window\n}\n","'use strict';\n\n// there's 3 implementations written in increasing order of efficiency\n\n// 1 - no Set type is defined\nfunction uniqNoSet(arr) {\n\tvar ret = [];\n\n\tfor (var i = 0; i < arr.length; i++) {\n\t\tif (ret.indexOf(arr[i]) === -1) {\n\t\t\tret.push(arr[i]);\n\t\t}\n\t}\n\n\treturn ret;\n}\n\n// 2 - a simple Set type is defined\nfunction uniqSet(arr) {\n\tvar seen = new Set();\n\treturn arr.filter(function (el) {\n\t\tif (!seen.has(el)) {\n\t\t\tseen.add(el);\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t});\n}\n\n// 3 - a standard Set type is defined and it has a forEach method\nfunction uniqSetWithForEach(arr) {\n\tvar ret = [];\n\n\t(new Set(arr)).forEach(function (el) {\n\t\tret.push(el);\n\t});\n\n\treturn ret;\n}\n\n// V8 currently has a broken implementation\n// https://github.com/joyent/node/issues/8449\nfunction doesForEachActuallyWork() {\n\tvar ret = false;\n\n\t(new Set([true])).forEach(function (el) {\n\t\tret = el;\n\t});\n\n\treturn ret === true;\n}\n\nif ('Set' in global) {\n\tif (typeof Set.prototype.forEach === 'function' && doesForEachActuallyWork()) {\n\t\tmodule.exports = uniqSetWithForEach;\n\t} else {\n\t\tmodule.exports = uniqSet;\n\t}\n} else {\n\tmodule.exports = uniqNoSet;\n}\n","import getNumber from './get-number';\n\nclass Point {\n\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element) {\n id += 1;\n this.id = id;\n this.element = element;\n this.isVisible = true;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n left: 0,\n visibility: 'visible',\n 'will-change': 'transform',\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {},\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","const element = document.body || document.documentElement;\nconst e = 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\ No newline at end of file
diff --git a/src/shuffle.js b/src/shuffle.js
index e3d21a7..7d303a8 100644
--- a/src/shuffle.js
+++ b/src/shuffle.js
@@ -18,11 +18,7 @@ function toArray(arrayLike) {
}
function arrayIncludes(array, obj) {
- if (arguments.length === 2) {
- return arrayIncludes(array)(obj);
- }
-
- return obj => array.indexOf(obj) > -1;
+ return array.indexOf(obj) > -1;
}
// Used for unique instance variables
@@ -230,19 +226,23 @@ class Shuffle {
_doesPassFilter(category, element) {
if (typeof category === 'function') {
return category.call(element, element, this);
+ }
// Check each element's data-groups attribute against the given category.
- }
const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);
const keys = this.options.delimeter ?
attr.split(this.options.delimeter) :
JSON.parse(attr);
+ function testCategory(category) {
+ return arrayIncludes(keys, category);
+ }
+
if (Array.isArray(category)) {
- if (this.options.filterMode !== Shuffle.filterMode.EXCLUSIVE) {
- return category.every(arrayIncludes(keys));
+ if (this.options.filterMode === Shuffle.FilterMode.ANY) {
+ return category.some(testCategory);
}
- return category.some(arrayIncludes(keys));
+ return category.every(testCategory);
}
return arrayIncludes(keys, category);
@@ -1035,9 +1035,9 @@ Shuffle.Classes = Classes;
/**
* @enum {string}
*/
-Shuffle.filterMode = {
- EXCLUSIVE: 'exclusive',
- ADDITIVE: 'additive',
+Shuffle.FilterMode = {
+ ANY: 'any',
+ ALL: 'all',
};
// Overrideable options
@@ -1098,8 +1098,10 @@ Shuffle.options = {
// Whether to use transforms or absolute positioning.
useTransforms: true,
- // Filters elements with "some" when 'exclusive' and with every on 'additive'
- filterMode: Shuffle.filterMode.EXCLUSIVE,
+ // Affects using an array with filter. e.g. `filter(['one', 'two'])`. With "any",
+ // the element passes the test if any of its groups are in the array. With "all",
+ // the element only passes if all groups are in the array.
+ filterMode: Shuffle.FilterMode.ANY,
};
// Expose for testing. Hack at your own risk.
diff --git a/test/test.js b/test/test.js
index 27c4cdd..ea2c23e 100644
--- a/test/test.js
+++ b/test/test.js
@@ -346,6 +346,17 @@ describe('shuffle', function () {
expect(instance._doesPassFilter(function (element) {
return element.getAttribute('data-age') === '22';
}, first)).to.equal(false);
+
+ // Arrays.
+ expect(instance._doesPassFilter(['design'], first)).to.be.true;
+ expect(instance._doesPassFilter(['red'], first)).to.be.true;
+ expect(instance._doesPassFilter(['design', 'black'], first)).to.be.true;
+
+ // Change filter mode.
+ instance.options.filterMode = Shuffle.FilterMode.ALL;
+ expect(instance._doesPassFilter(['design'], first)).to.be.true;
+ expect(instance._doesPassFilter(['design', 'red'], first)).to.be.true;
+ expect(instance._doesPassFilter(['design', 'black'], first)).to.be.false;
});
it('will maintain the last sort object', function () {