avances en plantillas

2026-05-01 18:15:40 -05:00 · 2026-05-01 18:15:40 -05:00 · da0530d79b
commit da0530d79b
parent 0f84beacf1
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--- a/storage/public/dist/libs/sortablejs/LICENSE
+++ b/storage/public/dist/libs/sortablejs/LICENSE
@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 All contributors to Sortable
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/storage/public/dist/libs/sortablejs/README.md
+++ b/storage/public/dist/libs/sortablejs/README.md
@ -0,0 +1,829 @@
+# Sortable &nbsp; [![Financial Contributors on Open Collective](https://opencollective.com/Sortable/all/badge.svg?label=financial+contributors)](https://opencollective.com/Sortable) [![CircleCI](https://circleci.com/gh/SortableJS/Sortable.svg?style=svg)](https://circleci.com/gh/SortableJS/Sortable) [![DeepScan grade](https://deepscan.io/api/teams/3901/projects/5666/branches/43977/badge/grade.svg)](https://deepscan.io/dashboard#view=project&tid=3901&pid=5666&bid=43977) [![](https://data.jsdelivr.com/v1/package/npm/sortablejs/badge)](https://www.jsdelivr.com/package/npm/sortablejs) [![npm](https://img.shields.io/npm/v/sortablejs.svg)](https://www.npmjs.com/package/sortablejs)
+
+Sortable is a JavaScript library for reorderable drag-and-drop lists.
+
+Demo: http://sortablejs.github.io/Sortable/
+
+[<img width="250px" src="https://raw.githubusercontent.com/SortableJS/Sortable/HEAD/st/saucelabs.svg?sanitize=true">](https://saucelabs.com/)
+
+## Features
+
+ * Supports touch devices and [modern](http://caniuse.com/#search=drag) browsers (including IE9)
+ * Can drag from one list to another or within the same list
+ * CSS animation when moving items
+ * Supports drag handles *and selectable text* (better than voidberg's html5sortable)
+ * Smart auto-scrolling
+ * Advanced swap detection
+ * Smooth animations
+ * [Multi-drag](https://github.com/SortableJS/Sortable/tree/master/plugins/MultiDrag) support
+ * Support for CSS transforms
+ * Built using native HTML5 drag and drop API
+ * Supports
+   * [Meteor](https://github.com/SortableJS/meteor-sortablejs)
+   * Angular
+     * [2.0+](https://github.com/SortableJS/angular-sortablejs)
+     * [1.&ast;](https://github.com/SortableJS/angular-legacy-sortablejs)
+   * React
+     * [ES2015+](https://github.com/SortableJS/react-sortablejs)
+     * [Mixin](https://github.com/SortableJS/react-mixin-sortablejs)
+   * [Knockout](https://github.com/SortableJS/knockout-sortablejs)
+   * [Polymer](https://github.com/SortableJS/polymer-sortablejs)
+   * [Vue](https://github.com/SortableJS/Vue.Draggable)
+   * [Ember](https://github.com/SortableJS/ember-sortablejs)
+ * Supports any CSS library, e.g. [Bootstrap](#bs)
+ * Simple API
+ * Support for [plugins](#plugins)
+ * [CDN](#cdn)
+ * No jQuery required (but there is [support](https://github.com/SortableJS/jquery-sortablejs))
+ * Typescript definitions at `@types/sortablejs`
+
+
+<br/>
+
+
+### Articles
+
+ * [Dragging Multiple Items in Sortable](https://github.com/SortableJS/Sortable/wiki/Dragging-Multiple-Items-in-Sortable) (April 26, 2019)
+ * [Swap Thresholds and Direction](https://github.com/SortableJS/Sortable/wiki/Swap-Thresholds-and-Direction) (December 2, 2018)
+ * [Sortable v1.0 — New capabilities](https://github.com/SortableJS/Sortable/wiki/Sortable-v1.0-—-New-capabilities/) (December 22, 2014)
+ * [Sorting with the help of HTML5 Drag'n'Drop API](https://github.com/SortableJS/Sortable/wiki/Sorting-with-the-help-of-HTML5-Drag'n'Drop-API/) (December 23, 2013)
+
+<br/>
+
+### Getting Started
+
+Install with NPM:
+```bash
+npm install sortablejs --save
+```
+
+Install with Bower:
+```bash
+bower install --save sortablejs
+```
+
+Import into your project:
+```js
+// Default SortableJS
+import Sortable from 'sortablejs';
+
+// Core SortableJS (without default plugins)
+import Sortable from 'sortablejs/modular/sortable.core.esm.js';
+
+// Complete SortableJS (with all plugins)
+import Sortable from 'sortablejs/modular/sortable.complete.esm.js';
+```
+
+Cherrypick plugins:
+```js
+// Cherrypick extra plugins
+import Sortable, { MultiDrag, Swap } from 'sortablejs';
+
+Sortable.mount(new MultiDrag(), new Swap());
+
+
+// Cherrypick default plugins
+import Sortable, { AutoScroll } from 'sortablejs/modular/sortable.core.esm.js';
+
+Sortable.mount(new AutoScroll());
+```
+
+
+---
+
+
+### Usage
+```html
+<ul id="items">
+	<li>item 1</li>
+	<li>item 2</li>
+	<li>item 3</li>
+</ul>
+```
+
+```js
+var el = document.getElementById('items');
+var sortable = Sortable.create(el);
+```
+
+You can use any element for the list and its elements, not just `ul`/`li`. Here is an [example with `div`s](https://jsbin.com/visimub/edit?html,js,output).
+
+
+---
+
+
+### Options
+```js
+var sortable = new Sortable(el, {
+	group: "name",  // or { name: "...", pull: [true, false, 'clone', array], put: [true, false, array] }
+	sort: true,  // sorting inside list
+	delay: 0, // time in milliseconds to define when the sorting should start
+	delayOnTouchOnly: false, // only delay if user is using touch
+	touchStartThreshold: 0, // px, how many pixels the point should move before cancelling a delayed drag event
+	disabled: false, // Disables the sortable if set to true.
+	store: null,  // @see Store
+	animation: 150,  // ms, animation speed moving items when sorting, `0` — without animation
+	easing: "cubic-bezier(1, 0, 0, 1)", // Easing for animation. Defaults to null. See https://easings.net/ for examples.
+	handle: ".my-handle",  // Drag handle selector within list items
+	filter: ".ignore-elements",  // Selectors that do not lead to dragging (String or Function)
+	preventOnFilter: true, // Call `event.preventDefault()` when triggered `filter`
+	draggable: ".item",  // Specifies which items inside the element should be draggable
+
+	dataIdAttr: 'data-id', // HTML attribute that is used by the `toArray()` method
+
+	ghostClass: "sortable-ghost",  // Class name for the drop placeholder
+	chosenClass: "sortable-chosen",  // Class name for the chosen item
+	dragClass: "sortable-drag",  // Class name for the dragging item
+
+	swapThreshold: 1, // Threshold of the swap zone
+	invertSwap: false, // Will always use inverted swap zone if set to true
+	invertedSwapThreshold: 1, // Threshold of the inverted swap zone (will be set to swapThreshold value by default)
+	direction: 'horizontal', // Direction of Sortable (will be detected automatically if not given)
+
+	forceFallback: false,  // ignore the HTML5 DnD behaviour and force the fallback to kick in
+
+	fallbackClass: "sortable-fallback",  // Class name for the cloned DOM Element when using forceFallback
+	fallbackOnBody: false,  // Appends the cloned DOM Element into the Document's Body
+	fallbackTolerance: 0, // Specify in pixels how far the mouse should move before it's considered as a drag.
+
+	dragoverBubble: false,
+	removeCloneOnHide: true, // Remove the clone element when it is not showing, rather than just hiding it
+	emptyInsertThreshold: 5, // px, distance mouse must be from empty sortable to insert drag element into it
+
+
+	setData: function (/** DataTransfer */dataTransfer, /** HTMLElement*/dragEl) {
+		dataTransfer.setData('Text', dragEl.textContent); // `dataTransfer` object of HTML5 DragEvent
+	},
+
+	// Element is chosen
+	onChoose: function (/**Event*/evt) {
+		evt.oldIndex;  // element index within parent
+	},
+
+	// Element is unchosen
+	onUnchoose: function(/**Event*/evt) {
+		// same properties as onEnd
+	},
+
+	// Element dragging started
+	onStart: function (/**Event*/evt) {
+		evt.oldIndex;  // element index within parent
+	},
+
+	// Element dragging ended
+	onEnd: function (/**Event*/evt) {
+		var itemEl = evt.item;  // dragged HTMLElement
+		evt.to;    // target list
+		evt.from;  // previous list
+		evt.oldIndex;  // element's old index within old parent
+		evt.newIndex;  // element's new index within new parent
+		evt.oldDraggableIndex; // element's old index within old parent, only counting draggable elements
+		evt.newDraggableIndex; // element's new index within new parent, only counting draggable elements
+		evt.clone // the clone element
+		evt.pullMode;  // when item is in another sortable: `"clone"` if cloning, `true` if moving
+	},
+
+	// Element is dropped into the list from another list
+	onAdd: function (/**Event*/evt) {
+		// same properties as onEnd
+	},
+
+	// Changed sorting within list
+	onUpdate: function (/**Event*/evt) {
+		// same properties as onEnd
+	},
+
+	// Called by any change to the list (add / update / remove)
+	onSort: function (/**Event*/evt) {
+		// same properties as onEnd
+	},
+
+	// Element is removed from the list into another list
+	onRemove: function (/**Event*/evt) {
+		// same properties as onEnd
+	},
+
+	// Attempt to drag a filtered element
+	onFilter: function (/**Event*/evt) {
+		var itemEl = evt.item;  // HTMLElement receiving the `mousedown|tapstart` event.
+	},
+
+	// Event when you move an item in the list or between lists
+	onMove: function (/**Event*/evt, /**Event*/originalEvent) {
+		// Example: https://jsbin.com/nawahef/edit?js,output
+		evt.dragged; // dragged HTMLElement
+		evt.draggedRect; // DOMRect {left, top, right, bottom}
+		evt.related; // HTMLElement on which have guided
+		evt.relatedRect; // DOMRect
+		evt.willInsertAfter; // Boolean that is true if Sortable will insert drag element after target by default
+		originalEvent.clientY; // mouse position
+		// return false; — for cancel
+		// return -1; — insert before target
+		// return 1; — insert after target
+		// return true; — keep default insertion point based on the direction
+		// return void; — keep default insertion point based on the direction
+	},
+
+	// Called when creating a clone of element
+	onClone: function (/**Event*/evt) {
+		var origEl = evt.item;
+		var cloneEl = evt.clone;
+	},
+
+	// Called when dragging element changes position
+	onChange: function(/**Event*/evt) {
+		evt.newIndex // most likely why this event is used is to get the dragging element's current index
+		// same properties as onEnd
+	}
+});
+```
+
+
+---
+
+
+#### `group` option
+To drag elements from one list into another, both lists must have the same `group` value.
+You can also define whether lists can give away, give and keep a copy (`clone`), and receive elements.
+
+ * name: `String` — group name
+ * pull: `true|false|["foo", "bar"]|'clone'|function` — ability to move from the list. `clone` — copy the item, rather than move. Or an array of group names which the elements may be put in. Defaults to `true`.
+ * put: `true|false|["baz", "qux"]|function` — whether elements can be added from other lists, or an array of group names from which elements can be added.
+ * revertClone: `boolean` — revert cloned element to initial position after moving to a another list.
+
+
+Demo:
+ - https://jsbin.com/hijetos/edit?js,output
+ - https://jsbin.com/nacoyah/edit?js,output — use of complex logic in the `pull` and` put`
+ - https://jsbin.com/bifuyab/edit?js,output — use `revertClone: true`
+
+
+---
+
+
+#### `sort` option
+Allow sorting inside list.
+
+Demo: https://jsbin.com/jayedig/edit?js,output
+
+
+---
+
+
+#### `delay` option
+Time in milliseconds to define when the sorting should start.
+Unfortunately, due to browser restrictions, delaying is not possible on IE or Edge with native drag & drop.
+
+Demo: https://jsbin.com/zosiwah/edit?js,output
+
+
+---
+
+
+#### `delayOnTouchOnly` option
+Whether or not the delay should be applied only if the user is using touch (eg. on a mobile device). No delay will be applied in any other case. Defaults to `false`.
+
+
+---
+
+
+#### `swapThreshold` option
+Percentage of the target that the swap zone will take up, as a float between `0` and `1`.
+
+[Read more](https://github.com/SortableJS/Sortable/wiki/Swap-Thresholds-and-Direction#swap-threshold)
+
+Demo: http://sortablejs.github.io/Sortable#thresholds
+
+
+---
+
+
+#### `invertSwap` option
+Set to `true` to set the swap zone to the sides of the target, for the effect of sorting "in between" items.
+
+[Read more](https://github.com/SortableJS/Sortable/wiki/Swap-Thresholds-and-Direction#forcing-inverted-swap-zone)
+
+Demo: http://sortablejs.github.io/Sortable#thresholds
+
+
+---
+
+
+#### `invertedSwapThreshold` option
+Percentage of the target that the inverted swap zone will take up, as a float between `0` and `1`. If not given, will default to `swapThreshold`.
+
+[Read more](https://github.com/SortableJS/Sortable/wiki/Swap-Thresholds-and-Direction#dealing-with-swap-glitching)
+
+
+---
+
+
+#### `direction` option
+Direction that the Sortable should sort in. Can be set to `'vertical'`, `'horizontal'`, or a function, which will be called whenever a target is dragged over. Must return `'vertical'` or `'horizontal'`.
+
+[Read more](https://github.com/SortableJS/Sortable/wiki/Swap-Thresholds-and-Direction#direction)
+
+
+Example of direction detection for vertical list that includes full column and half column elements:
+
+```js
+Sortable.create(el, {
+	direction: function(evt, target, dragEl) {
+		if (target !== null && target.className.includes('half-column') && dragEl.className.includes('half-column')) {
+			return 'horizontal';
+		}
+		return 'vertical';
+	}
+});
+```
+
+
+---
+
+
+#### `touchStartThreshold` option
+This option is similar to `fallbackTolerance` option.
+
+When the `delay` option is set, some phones with very sensitive touch displays like the Samsung Galaxy S8 will fire
+unwanted touchmove events even when your finger is not moving, resulting in the sort not triggering.
+
+This option sets the minimum pointer movement that must occur before the delayed sorting is cancelled.
+
+Values between 3 to 5 are good.
+
+
+---
+
+
+#### `disabled` options
+Disables the sortable if set to `true`.
+
+Demo: https://jsbin.com/sewokud/edit?js,output
+
+```js
+var sortable = Sortable.create(list);
+
+document.getElementById("switcher").onclick = function () {
+	var state = sortable.option("disabled"); // get
+
+	sortable.option("disabled", !state); // set
+};
+```
+
+
+---
+
+
+#### `handle` option
+To make list items draggable, Sortable disables text selection by the user.
+That's not always desirable. To allow text selection, define a drag handler,
+which is an area of every list element that allows it to be dragged around.
+
+Demo: https://jsbin.com/numakuh/edit?html,js,output
+
+```js
+Sortable.create(el, {
+	handle: ".my-handle"
+});
+```
+
+```html
+<ul>
+	<li><span class="my-handle">::</span> list item text one
+	<li><span class="my-handle">::</span> list item text two
+</ul>
+```
+
+```css
+.my-handle {
+	cursor: move;
+	cursor: -webkit-grabbing;
+}
+```
+
+
+---
+
+
+#### `filter` option
+
+
+```js
+Sortable.create(list, {
+	filter: ".js-remove, .js-edit",
+	onFilter: function (evt) {
+		var item = evt.item,
+			ctrl = evt.target;
+
+		if (Sortable.utils.is(ctrl, ".js-remove")) {  // Click on remove button
+			item.parentNode.removeChild(item); // remove sortable item
+		}
+		else if (Sortable.utils.is(ctrl, ".js-edit")) {  // Click on edit link
+			// ...
+		}
+	}
+})
+```
+
+
+---
+
+
+#### `ghostClass` option
+Class name for the drop placeholder (default `sortable-ghost`).
+
+Demo: https://jsbin.com/henuyiw/edit?css,js,output
+
+```css
+.ghost {
+  opacity: 0.4;
+}
+```
+
+```js
+Sortable.create(list, {
+  ghostClass: "ghost"
+});
+```
+
+
+---
+
+
+#### `chosenClass` option
+Class name for the chosen item  (default `sortable-chosen`).
+
+Demo: https://jsbin.com/hoqufox/edit?css,js,output
+
+```css
+.chosen {
+  color: #fff;
+  background-color: #c00;
+}
+```
+
+```js
+Sortable.create(list, {
+  delay: 500,
+  chosenClass: "chosen"
+});
+```
+
+
+---
+
+
+#### `forceFallback` option
+If set to `true`, the Fallback for non HTML5 Browser will be used, even if we are using an HTML5 Browser.
+This gives us the possibility to test the behaviour for older Browsers even in newer Browser, or make the Drag 'n Drop feel more consistent between Desktop , Mobile and old Browsers.
+
+On top of that, the Fallback always generates a copy of that DOM Element and appends the class `fallbackClass` defined in the options. This behaviour controls the look of this 'dragged' Element.
+
+Demo: https://jsbin.com/sibiput/edit?html,css,js,output
+
+
+---
+
+
+#### `fallbackTolerance` option
+Emulates the native drag threshold. Specify in pixels how far the mouse should move before it's considered as a drag.
+Useful if the items are also clickable like in a list of links.
+
+When the user clicks inside a sortable element, it's not uncommon for your hand to move a little between the time you press and the time you release.
+Dragging only starts if you move the pointer past a certain tolerance, so that you don't accidentally start dragging every time you click.
+
+3 to 5 are probably good values.
+
+
+---
+
+
+#### `dragoverBubble` option
+If set to `true`, the dragover event will bubble to parent sortables. Works on both fallback and native dragover event.
+By default, it is false, but Sortable will only stop bubbling the event once the element has been inserted into a parent Sortable, or *can* be inserted into a parent Sortable, but isn't at that specific time (due to animation, etc).
+
+Since 1.8.0, you will probably want to leave this option as false. Before 1.8.0, it may need to be `true` for nested sortables to work.
+
+
+---
+
+
+#### `removeCloneOnHide` option
+If set to `false`, the clone is hidden by having it's CSS `display` property set to `none`.
+By default, this option is `true`, meaning Sortable will remove the cloned element from the DOM when it is supposed to be hidden.
+
+
+---
+
+
+#### `emptyInsertThreshold` option
+The distance (in pixels) the mouse must be from an empty sortable while dragging for the drag element to be inserted into that sortable. Defaults to `5`. Set to `0` to disable this feature.
+
+Demo: https://jsbin.com/becavoj/edit?js,output
+
+An alternative to this option would be to set a padding on your list when it is empty.
+
+For example:
+```css
+ul:empty {
+  padding-bottom: 20px;
+}
+```
+
+Warning: For `:empty` to work, it must have no node inside (even text one).
+
+Demo:
+https://jsbin.com/yunakeg/edit?html,css,js,output
+
+---
+### Event object ([demo](https://jsbin.com/fogujiv/edit?js,output))
+
+ - to:`HTMLElement` — list, in which moved element
+ - from:`HTMLElement` — previous list
+ - item:`HTMLElement` — dragged element
+ - clone:`HTMLElement`
+ - oldIndex:`Number|undefined` — old index within parent
+ - newIndex:`Number|undefined` — new index within parent
+ - oldDraggableIndex: `Number|undefined` — old index within parent, only counting draggable elements
+ - newDraggableIndex: `Number|undefined` — new index within parent, only counting draggable elements
+ - pullMode:`String|Boolean|undefined` — Pull mode if dragging into another sortable (`"clone"`, `true`, or `false`), otherwise undefined
+
+
+#### `move` event object
+ - to:`HTMLElement`
+ - from:`HTMLElement`
+ - dragged:`HTMLElement`
+ - draggedRect:`DOMRect`
+ - related:`HTMLElement` — element on which have guided
+ - relatedRect:`DOMRect`
+ - willInsertAfter:`Boolean` — `true` if will element be inserted after target (or `false` if before)
+
+
+---
+
+
+### Methods
+
+
+##### option(name:`String`[, value:`*`]):`*`
+Get or set the option.
+
+
+
+##### closest(el:`HTMLElement`[, selector:`String`]):`HTMLElement|null`
+For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.
+
+
+##### toArray():`String[]`
+Serializes the sortable's item `data-id`'s (`dataIdAttr` option) into an array of string.
+
+
+##### sort(order:`String[]`, useAnimation:`Boolean`)
+Sorts the elements according to the array.
+
+```js
+var order = sortable.toArray();
+sortable.sort(order.reverse(), true); // apply
+```
+
+
+##### save()
+Save the current sorting (see [store](#store))
+
+
+##### destroy()
+Removes the sortable functionality completely.
+
+
+---
+
+
+<a name="store"></a>
+### Store
+Saving and restoring of the sort.
+
+```html
+<ul>
+	<li data-id="1">order</li>
+	<li data-id="2">save</li>
+	<li data-id="3">restore</li>
+</ul>
+```
+
+```js
+Sortable.create(el, {
+	group: "localStorage-example",
+	store: {
+		/**
+		 * Get the order of elements. Called once during initialization.
+		 * @param   {Sortable}  sortable
+		 * @returns {Array}
+		 */
+		get: function (sortable) {
+			var order = localStorage.getItem(sortable.options.group.name);
+			return order ? order.split('|') : [];
+		},
+
+		/**
+		 * Save the order of elements. Called onEnd (when the item is dropped).
+		 * @param {Sortable}  sortable
+		 */
+		set: function (sortable) {
+			var order = sortable.toArray();
+			localStorage.setItem(sortable.options.group.name, order.join('|'));
+		}
+	}
+})
+```
+
+
+---
+
+
+<a name="bs"></a>
+### Bootstrap
+Demo: https://jsbin.com/visimub/edit?html,js,output
+
+```html
+<!-- Latest compiled and minified CSS -->
+<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css"/>
+
+
+<!-- Latest Sortable -->
+<script src="http://SortableJS.github.io/Sortable/Sortable.js"></script>
+
+
+<!-- Simple List -->
+<ul id="simpleList" class="list-group">
+	<li class="list-group-item">This is <a href="http://SortableJS.github.io/Sortable/">Sortable</a></li>
+	<li class="list-group-item">It works with Bootstrap...</li>
+	<li class="list-group-item">...out of the box.</li>
+	<li class="list-group-item">It has support for touch devices.</li>
+	<li class="list-group-item">Just drag some elements around.</li>
+</ul>
+
+<script>
+    // Simple list
+    Sortable.create(simpleList, { /* options */ });
+</script>
+```
+
+
+---
+
+
+### Static methods & properties
+
+
+
+##### Sortable.create(el:`HTMLElement`[, options:`Object`]):`Sortable`
+Create new instance.
+
+
+---
+
+
+##### Sortable.active:`Sortable`
+The active Sortable instance.
+
+
+---
+
+
+##### Sortable.dragged:`HTMLElement`
+The element being dragged.
+
+
+---
+
+
+##### Sortable.ghost:`HTMLElement`
+The ghost element.
+
+
+---
+
+
+##### Sortable.clone:`HTMLElement`
+The clone element.
+
+
+---
+
+
+##### Sortable.get(element:`HTMLElement`):`Sortable`
+Get the Sortable instance on an element.
+
+
+---
+
+
+##### Sortable.mount(plugin:`...SortablePlugin|SortablePlugin[]`)
+Mounts a plugin to Sortable.
+
+
+---
+
+
+##### Sortable.utils
+* on(el`:HTMLElement`, event`:String`, fn`:Function`) — attach an event handler function
+* off(el`:HTMLElement`, event`:String`, fn`:Function`) — remove an event handler
+* css(el`:HTMLElement`)`:Object` — get the values of all the CSS properties
+* css(el`:HTMLElement`, prop`:String`)`:Mixed` — get the value of style properties
+* css(el`:HTMLElement`, prop`:String`, value`:String`) — set one CSS properties
+* css(el`:HTMLElement`, props`:Object`) — set more CSS properties
+* find(ctx`:HTMLElement`, tagName`:String`[, iterator`:Function`])`:Array` — get elements by tag name
+* bind(ctx`:Mixed`, fn`:Function`)`:Function` — Takes a function and returns a new one that will always have a particular context
+* is(el`:HTMLElement`, selector`:String`)`:Boolean` — check the current matched set of elements against a selector
+* closest(el`:HTMLElement`, selector`:String`[, ctx`:HTMLElement`])`:HTMLElement|Null` — for each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree
+* clone(el`:HTMLElement`)`:HTMLElement` — create a deep copy of the set of matched elements
+* toggleClass(el`:HTMLElement`, name`:String`, state`:Boolean`) — add or remove one classes from each element
+* detectDirection(el`:HTMLElement`)`:String` — automatically detect the [direction](https://github.com/SortableJS/Sortable/wiki/Swap-Thresholds-and-Direction#direction) of the element as either `'vertical'` or `'horizontal'`
+* index(el`:HTMLElement`, selector`:String`)`:Number` — index of the element within its parent for a selected set of elements
+* getChild(el`:HTMLElement`, childNum`:Number`, options`:Object`, includeDragEl`:Boolean`):`HTMLElement` — get the draggable element at a given index of draggable elements within a Sortable instance
+* expando`:String` — expando property name for internal use, sortableListElement[expando] returns the Sortable instance of that elemenet
+---
+
+
+### Plugins
+#### Extra Plugins (included in complete versions)
+ - [MultiDrag](https://github.com/SortableJS/Sortable/tree/master/plugins/MultiDrag)
+ - [Swap](https://github.com/SortableJS/Sortable/tree/master/plugins/Swap)
+
+#### Default Plugins (included in default versions)
+ - [AutoScroll](https://github.com/SortableJS/Sortable/tree/master/plugins/AutoScroll)
+ - [OnSpill](https://github.com/SortableJS/Sortable/tree/master/plugins/OnSpill)
+
+
+---
+
+
+<a name="cdn"></a>
+### CDN
+
+```html
+<!-- jsDelivr :: Sortable :: Latest (https://www.jsdelivr.com/package/npm/sortablejs) -->
+<script src="https://cdn.jsdelivr.net/npm/sortablejs@latest/Sortable.min.js"></script>
+```
+
+
+---
+
+
+### Contributing (Issue/PR)
+
+Please, [read this](CONTRIBUTING.md).
+
+
+---
+
+
+## Contributors
+
+### Code Contributors
+
+This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
+<a href="https://github.com/SortableJS/Sortable/graphs/contributors"><img src="https://opencollective.com/Sortable/contributors.svg?width=890&button=false" /></a>
+
+### Financial Contributors
+
+Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/Sortable/contribute)]
+
+#### Individuals
+
+<a href="https://opencollective.com/Sortable"><img src="https://opencollective.com/Sortable/individuals.svg?width=890"></a>
+
+#### Organizations
+
+Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/Sortable/contribute)]
+
+<a href="https://opencollective.com/Sortable/organization/0/website"><img src="https://opencollective.com/Sortable/organization/0/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/1/website"><img src="https://opencollective.com/Sortable/organization/1/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/2/website"><img src="https://opencollective.com/Sortable/organization/2/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/3/website"><img src="https://opencollective.com/Sortable/organization/3/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/4/website"><img src="https://opencollective.com/Sortable/organization/4/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/5/website"><img src="https://opencollective.com/Sortable/organization/5/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/6/website"><img src="https://opencollective.com/Sortable/organization/6/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/7/website"><img src="https://opencollective.com/Sortable/organization/7/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/8/website"><img src="https://opencollective.com/Sortable/organization/8/avatar.svg"></a>
+<a href="https://opencollective.com/Sortable/organization/9/website"><img src="https://opencollective.com/Sortable/organization/9/avatar.svg"></a>
+
+## MIT LICENSE
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/storage/public/dist/libs/sortablejs/Sortable.js
+++ b/storage/public/dist/libs/sortablejs/Sortable.js
--- a/storage/public/dist/libs/sortablejs/Sortable.min.js
+++ b/storage/public/dist/libs/sortablejs/Sortable.min.js
--- a/storage/public/dist/libs/sortablejs/modular/sortable.complete.esm.js
+++ b/storage/public/dist/libs/sortablejs/modular/sortable.complete.esm.js
--- a/storage/public/dist/libs/sortablejs/modular/sortable.core.esm.js
+++ b/storage/public/dist/libs/sortablejs/modular/sortable.core.esm.js
--- a/storage/public/dist/libs/sortablejs/modular/sortable.esm.js
+++ b/storage/public/dist/libs/sortablejs/modular/sortable.esm.js
--- a/storage/public/dist/libs/sortablejs/package.json
+++ b/storage/public/dist/libs/sortablejs/package.json
@ -0,0 +1,57 @@
+{
+	"name": "sortablejs",
+	"exportName": "Sortable",
+	"version": "1.15.7",
+	"devDependencies": {
+		"@babel/core": "^7.4.4",
+		"@babel/plugin-transform-object-assign": "^7.2.0",
+		"@babel/preset-env": "^7.4.4",
+		"rollup": "^1.11.3",
+		"rollup-plugin-babel": "^4.3.2",
+		"rollup-plugin-json": "^4.0.0",
+		"rollup-plugin-node-resolve": "^5.0.0",
+		"testcafe": "^1.3.1",
+		"testcafe-browser-provider-saucelabs": "^1.7.0",
+		"testcafe-reporter-xunit": "^2.1.0",
+		"uglify-js": "^3.5.12"
+	},
+	"description": "JavaScript library for reorderable drag-and-drop lists on modern browsers and touch devices. No jQuery required. Supports Meteor, AngularJS, React, Polymer, Vue, Knockout and any CSS library, e.g. Bootstrap.",
+	"main": "./Sortable.min.js",
+	"module": "modular/sortable.esm.js",
+	"scripts": {
+		"build:umd": "set NODE_ENV=umd&& rollup -c ./scripts/umd-build.js",
+		"build:umd:watch": "set NODE_ENV=umd&& rollup -w -c ./scripts/umd-build.js",
+		"build:es": "set NODE_ENV=es&& rollup -c ./scripts/esm-build.js",
+		"build:es:watch": "set NODE_ENV=es&& rollup -w -c ./scripts/esm-build.js",
+		"minify": "node ./scripts/minify.js",
+		"build": "npm run build:es && npm run build:umd && npm run minify",
+		"test:compat": "node ./scripts/test-compat.js",
+		"test": "node ./scripts/test.js"
+	},
+	"maintainers": [
+		"Konstantin Lebedev <ibnRubaXa@gmail.com>",
+		"Owen Mills <owen23355@gmail.com>"
+	],
+	"repository": {
+		"type": "git",
+		"url": "git://github.com/SortableJS/Sortable.git"
+	},
+	"files": [
+		"Sortable.js",
+		"Sortable.min.js",
+		"modular/",
+		"src/"
+	],
+	"keywords": [
+		"sortable",
+		"reorder",
+		"drag",
+		"meteor",
+		"angular",
+		"ng-sortable",
+		"react",
+		"vue",
+		"mixin"
+	],
+	"license": "MIT"
+}
--- a/storage/public/dist/libs/sortablejs/src/Animation.js
+++ b/storage/public/dist/libs/sortablejs/src/Animation.js
@ -0,0 +1,175 @@
+import { getRect, css, matrix, isRectEqual, indexOfObject } from './utils.js';
+import Sortable from './Sortable.js';
+
+export default function AnimationStateManager() {
+	let animationStates = [],
+		animationCallbackId;
+
+	return {
+		captureAnimationState() {
+			animationStates = [];
+			if (!this.options.animation) return;
+			let children = [].slice.call(this.el.children);
+
+			children.forEach(child => {
+				if (css(child, 'display') === 'none' || child === Sortable.ghost) return;
+				animationStates.push({
+					target: child,
+					rect: getRect(child)
+				});
+				let fromRect = { ...animationStates[animationStates.length - 1].rect };
+
+				// If animating: compensate for current animation
+				if (child.thisAnimationDuration) {
+					let childMatrix = matrix(child, true);
+					if (childMatrix) {
+						fromRect.top -= childMatrix.f;
+						fromRect.left -= childMatrix.e;
+					}
+				}
+
+				child.fromRect = fromRect;
+			});
+		},
+
+		addAnimationState(state) {
+			animationStates.push(state);
+		},
+
+		removeAnimationState(target) {
+			animationStates.splice(indexOfObject(animationStates, { target }), 1);
+		},
+
+		animateAll(callback) {
+			if (!this.options.animation) {
+				clearTimeout(animationCallbackId);
+				if (typeof(callback) === 'function') callback();
+				return;
+			}
+
+			let animating = false,
+				animationTime = 0;
+
+			animationStates.forEach((state) => {
+				let time = 0,
+					animatingThis = false,
+					target = state.target,
+					fromRect = target.fromRect,
+					toRect = getRect(target),
+					prevFromRect = target.prevFromRect,
+					prevToRect = target.prevToRect,
+					animatingRect = state.rect,
+					targetMatrix = matrix(target, true);
+
+
+				if (targetMatrix) {
+					// Compensate for current animation
+					toRect.top -= targetMatrix.f;
+					toRect.left -= targetMatrix.e;
+				}
+
+				target.toRect = toRect;
+
+				if (target.thisAnimationDuration) {
+					// Could also check if animatingRect is between fromRect and toRect
+					if (
+						isRectEqual(prevFromRect, toRect) &&
+						!isRectEqual(fromRect, toRect) &&
+						// Make sure animatingRect is on line between toRect & fromRect
+						(animatingRect.top - toRect.top) /
+						(animatingRect.left - toRect.left) ===
+						(fromRect.top - toRect.top) /
+						(fromRect.left - toRect.left)
+					) {
+						// If returning to same place as started from animation and on same axis
+						time = calculateRealTime(animatingRect, prevFromRect, prevToRect, this.options);
+					}
+				}
+
+				// if fromRect != toRect: animate
+				if (!isRectEqual(toRect, fromRect)) {
+					target.prevFromRect = fromRect;
+					target.prevToRect = toRect;
+
+					if (!time) {
+						time = this.options.animation;
+					}
+					this.animate(
+						target,
+						animatingRect,
+						toRect,
+						time
+					);
+				}
+
+				if (time) {
+					animating = true;
+					animationTime = Math.max(animationTime, time);
+					clearTimeout(target.animationResetTimer);
+					target.animationResetTimer = setTimeout(function() {
+						target.animationTime = 0;
+						target.prevFromRect = null;
+						target.fromRect = null;
+						target.prevToRect = null;
+						target.thisAnimationDuration = null;
+					}, time);
+					target.thisAnimationDuration = time;
+				}
+			});
+
+
+			clearTimeout(animationCallbackId);
+			if (!animating) {
+				if (typeof(callback) === 'function') callback();
+			} else {
+				animationCallbackId = setTimeout(function() {
+					if (typeof(callback) === 'function') callback();
+				}, animationTime);
+			}
+			animationStates = [];
+		},
+
+		animate(target, currentRect, toRect, duration) {
+			if (duration) {
+				css(target, 'transition', '');
+				css(target, 'transform', '');
+				let elMatrix = matrix(this.el),
+					scaleX = elMatrix && elMatrix.a,
+					scaleY = elMatrix && elMatrix.d,
+					translateX = (currentRect.left - toRect.left) / (scaleX || 1),
+					translateY = (currentRect.top - toRect.top) / (scaleY || 1);
+
+				target.animatingX = !!translateX;
+				target.animatingY = !!translateY;
+
+				css(target, 'transform', 'translate3d(' + translateX + 'px,' + translateY + 'px,0)');
+
+				this.forRepaintDummy = repaint(target); // repaint
+
+				css(target, 'transition', 'transform ' + duration + 'ms' + (this.options.easing ? ' ' + this.options.easing : ''));
+				css(target, 'transform', 'translate3d(0,0,0)');
+				(typeof target.animated === 'number') && clearTimeout(target.animated);
+				target.animated = setTimeout(function () {
+					css(target, 'transition', '');
+					css(target, 'transform', '');
+					target.animated = false;
+
+					target.animatingX = false;
+					target.animatingY = false;
+				}, duration);
+			}
+		}
+	};
+}
+
+function repaint(target) {
+	return target.offsetWidth;
+}
+
+
+function calculateRealTime(animatingRect, fromRect, toRect, options) {
+	return (
+		Math.sqrt(Math.pow(fromRect.top - animatingRect.top, 2) + Math.pow(fromRect.left - animatingRect.left, 2)) /
+		Math.sqrt(Math.pow(fromRect.top - toRect.top, 2) + Math.pow(fromRect.left - toRect.left, 2))
+	) * options.animation;
+}
--- a/storage/public/dist/libs/sortablejs/src/BrowserInfo.js
+++ b/storage/public/dist/libs/sortablejs/src/BrowserInfo.js
@ -0,0 +1,12 @@
+function userAgent(pattern) {
+	if (typeof window !== 'undefined' && window.navigator) {
+		return !!/*@__PURE__*/navigator.userAgent.match(pattern);
+	}
+}
+
+export const IE11OrLess = userAgent(/(?:Trident.*rv[ :]?11\.|msie|iemobile|Windows Phone)/i);
+export const Edge = userAgent(/Edge/i);
+export const FireFox = userAgent(/firefox/i);
+export const Safari = userAgent(/safari/i) && !userAgent(/chrome/i) && !userAgent(/android/i);
+export const IOS = userAgent(/iP(ad|od|hone)/i);
+export const ChromeForAndroid = userAgent(/chrome/i) && userAgent(/android/i);
--- a/storage/public/dist/libs/sortablejs/src/EventDispatcher.js
+++ b/storage/public/dist/libs/sortablejs/src/EventDispatcher.js
@ -0,0 +1,57 @@
+import { IE11OrLess, Edge } from './BrowserInfo.js';
+import { expando } from './utils.js';
+import PluginManager from './PluginManager.js';
+
+export default function dispatchEvent(
+	{
+		sortable, rootEl, name,
+		targetEl, cloneEl, toEl, fromEl,
+		oldIndex, newIndex,
+		oldDraggableIndex, newDraggableIndex,
+		originalEvent, putSortable, extraEventProperties
+	}
+) {
+	sortable = (sortable || (rootEl && rootEl[expando]));
+	if (!sortable) return;
+
+	let evt,
+		options = sortable.options,
+		onName = 'on' + name.charAt(0).toUpperCase() + name.substr(1);
+	// Support for new CustomEvent feature
+	if (window.CustomEvent && !IE11OrLess && !Edge) {
+		evt = new CustomEvent(name, {
+			bubbles: true,
+			cancelable: true
+		});
+	} else {
+		evt = document.createEvent('Event');
+		evt.initEvent(name, true, true);
+	}
+
+	evt.to = toEl || rootEl;
+	evt.from = fromEl || rootEl;
+	evt.item = targetEl || rootEl;
+	evt.clone = cloneEl;
+
+	evt.oldIndex = oldIndex;
+	evt.newIndex = newIndex;
+
+	evt.oldDraggableIndex = oldDraggableIndex;
+	evt.newDraggableIndex = newDraggableIndex;
+
+	evt.originalEvent = originalEvent;
+	evt.pullMode = putSortable ? putSortable.lastPutMode : undefined;
+
+	let allEventProperties = { ...extraEventProperties, ...PluginManager.getEventProperties(name, sortable) };
+	for (let option in allEventProperties) {
+		evt[option] = allEventProperties[option];
+	}
+
+	if (rootEl) {
+		rootEl.dispatchEvent(evt);
+	}
+
+	if (options[onName]) {
+		options[onName].call(sortable, evt);
+	}
+}
--- a/storage/public/dist/libs/sortablejs/src/PluginManager.js
+++ b/storage/public/dist/libs/sortablejs/src/PluginManager.js
@ -0,0 +1,94 @@
+let plugins = [];
+
+const defaults = {
+	initializeByDefault: true
+};
+
+export default {
+	mount(plugin) {
+		// Set default static properties
+		for (let option in defaults) {
+			if (defaults.hasOwnProperty(option) && !(option in plugin)) {
+				plugin[option] = defaults[option];
+			}
+		}
+
+		plugins.forEach(p => {
+			if (p.pluginName === plugin.pluginName) {
+				throw (`Sortable: Cannot mount plugin ${ plugin.pluginName } more than once`);
+			}
+		});
+
+		plugins.push(plugin);
+	},
+	pluginEvent(eventName, sortable, evt) {
+		this.eventCanceled = false;
+		evt.cancel = () => {
+			this.eventCanceled = true;
+		};
+		const eventNameGlobal = eventName + 'Global';
+		plugins.forEach(plugin => {
+			if (!sortable[plugin.pluginName]) return;
+			// Fire global events if it exists in this sortable
+			if (
+				sortable[plugin.pluginName][eventNameGlobal]
+			) {
+				sortable[plugin.pluginName][eventNameGlobal]({ sortable, ...evt });
+			}
+
+			// Only fire plugin event if plugin is enabled in this sortable,
+			// and plugin has event defined
+			if (
+				sortable.options[plugin.pluginName] &&
+				sortable[plugin.pluginName][eventName]
+			) {
+				sortable[plugin.pluginName][eventName]({ sortable, ...evt });
+			}
+		});
+	},
+	initializePlugins(sortable, el, defaults, options) {
+		plugins.forEach(plugin => {
+			const pluginName = plugin.pluginName;
+			if (!sortable.options[pluginName] && !plugin.initializeByDefault) return;
+
+			let initialized = new plugin(sortable, el, sortable.options);
+			initialized.sortable = sortable;
+			initialized.options = sortable.options;
+			sortable[pluginName] = initialized;
+
+			// Add default options from plugin
+			Object.assign(defaults, initialized.defaults);
+		});
+
+		for (let option in sortable.options) {
+			if (!sortable.options.hasOwnProperty(option)) continue;
+			let modified = this.modifyOption(sortable, option, sortable.options[option]);
+			if (typeof(modified) !== 'undefined') {
+				sortable.options[option] = modified;
+			}
+		}
+	},
+	getEventProperties(name, sortable) {
+		let eventProperties = {};
+		plugins.forEach(plugin => {
+			if (typeof(plugin.eventProperties) !== 'function') return;
+			Object.assign(eventProperties, plugin.eventProperties.call(sortable[plugin.pluginName], name));
+		});
+
+		return eventProperties;
+	},
+	modifyOption(sortable, name, value) {
+		let modifiedValue;
+		plugins.forEach(plugin => {
+			// Plugin must exist on the Sortable
+			if (!sortable[plugin.pluginName]) return;
+
+			// If static option listener exists for this option, call in the context of the Sortable's instance of this plugin
+			if (plugin.optionListeners && typeof(plugin.optionListeners[name]) === 'function') {
+				modifiedValue = plugin.optionListeners[name].call(sortable[plugin.pluginName], value);
+			}
+		});
+
+		return modifiedValue;
+	}
+};
--- a/storage/public/dist/libs/sortablejs/src/Sortable.js
+++ b/storage/public/dist/libs/sortablejs/src/Sortable.js
--- a/storage/public/dist/libs/sortablejs/src/utils.js
+++ b/storage/public/dist/libs/sortablejs/src/utils.js
@ -0,0 +1,595 @@
+import { IE11OrLess } from './BrowserInfo.js';
+import Sortable from './Sortable.js';
+
+const captureMode = {
+	capture: false,
+	passive: false
+};
+
+function on(el, event, fn) {
+	el.addEventListener(event, fn, !IE11OrLess && captureMode);
+}
+
+
+function off(el, event, fn) {
+	el.removeEventListener(event, fn, !IE11OrLess && captureMode);
+}
+
+function matches(/**HTMLElement*/el, /**String*/selector) {
+	if (!selector) return;
+
+	selector[0] === '>' && (selector = selector.substring(1));
+
+	if (el) {
+		try {
+			if (el.matches) {
+				return el.matches(selector);
+			} else if (el.msMatchesSelector) {
+				return el.msMatchesSelector(selector);
+			} else if (el.webkitMatchesSelector) {
+				return el.webkitMatchesSelector(selector);
+			}
+		} catch(_) {
+			return false;
+		}
+	}
+
+	return false;
+}
+
+function getParentOrHost(el) {
+	return (el.host && el !== document && el.host.nodeType && el.host !== el)
+		? el.host
+		: el.parentNode;
+}
+
+function closest(/**HTMLElement*/el, /**String*/selector, /**HTMLElement*/ctx, includeCTX) {
+	if (el) {
+		ctx = ctx || document;
+
+		do {
+			if (
+				selector != null &&
+				(
+					selector[0] === '>' ?
+					el.parentNode === ctx && matches(el, selector) :
+					matches(el, selector)
+				) ||
+				includeCTX && el === ctx
+			) {
+				return el;
+			}
+
+			if (el === ctx) break;
+			/* jshint boss:true */
+		} while (el = getParentOrHost(el));
+	}
+
+	return null;
+}
+
+const R_SPACE = /\s+/g;
+
+function toggleClass(el, name, state) {
+	if (el && name) {
+		if (el.classList) {
+			el.classList[state ? 'add' : 'remove'](name);
+		}
+		else {
+			let className = (' ' + el.className + ' ').replace(R_SPACE, ' ').replace(' ' + name + ' ', ' ');
+			el.className = (className + (state ? ' ' + name : '')).replace(R_SPACE, ' ');
+		}
+	}
+}
+
+
+function css(el, prop, val) {
+	let style = el && el.style;
+
+	if (style) {
+		if (val === void 0) {
+			if (document.defaultView && document.defaultView.getComputedStyle) {
+				val = document.defaultView.getComputedStyle(el, '');
+			}
+			else if (el.currentStyle) {
+				val = el.currentStyle;
+			}
+
+			return prop === void 0 ? val : val[prop];
+		}
+		else {
+			if (!(prop in style) && prop.indexOf('webkit') === -1) {
+				prop = '-webkit-' + prop;
+			}
+
+			style[prop] = val + (typeof val === 'string' ? '' : 'px');
+		}
+	}
+}
+
+function matrix(el, selfOnly) {
+	let appliedTransforms = '';
+	if (typeof(el) === 'string') {
+		appliedTransforms = el;
+	} else {
+		do {
+			let transform = css(el, 'transform');
+
+			if (transform && transform !== 'none') {
+				appliedTransforms = transform + ' ' + appliedTransforms;
+			}
+			/* jshint boss:true */
+		} while (!selfOnly && (el = el.parentNode));
+	}
+
+	const matrixFn = window.DOMMatrix || window.WebKitCSSMatrix || window.CSSMatrix || window.MSCSSMatrix;
+	/*jshint -W056 */
+	return matrixFn && (new matrixFn(appliedTransforms));
+}
+
+
+function find(ctx, tagName, iterator) {
+	if (ctx) {
+		let list = ctx.getElementsByTagName(tagName), i = 0, n = list.length;
+
+		if (iterator) {
+			for (; i < n; i++) {
+				iterator(list[i], i);
+			}
+		}
+
+		return list;
+	}
+
+	return [];
+}
+
+
+
+function getWindowScrollingElement() {
+	let scrollingElement = document.scrollingElement;
+
+	if (scrollingElement) {
+		return scrollingElement
+	} else {
+		return document.documentElement
+	}
+}
+
+
+/**
+ * Returns the "bounding client rect" of given element
+ * @param  {HTMLElement} el                       The element whose boundingClientRect is wanted
+ * @param  {[Boolean]} relativeToContainingBlock  Whether the rect should be relative to the containing block of (including) the container
+ * @param  {[Boolean]} relativeToNonStaticParent  Whether the rect should be relative to the relative parent of (including) the contaienr
+ * @param  {[Boolean]} undoScale                  Whether the container's scale() should be undone
+ * @param  {[HTMLElement]} container              The parent the element will be placed in
+ * @return {Object}                               The boundingClientRect of el, with specified adjustments
+ */
+function getRect(el, relativeToContainingBlock, relativeToNonStaticParent, undoScale, container) {
+	if (!el.getBoundingClientRect && el !== window) return;
+
+	let elRect,
+		top,
+		left,
+		bottom,
+		right,
+		height,
+		width;
+
+	if (el !== window && el.parentNode && el !== getWindowScrollingElement()) {
+		elRect = el.getBoundingClientRect();
+		top = elRect.top;
+		left = elRect.left;
+		bottom = elRect.bottom;
+		right = elRect.right;
+		height = elRect.height;
+		width = elRect.width;
+	} else {
+		top = 0;
+		left = 0;
+		bottom = window.innerHeight;
+		right = window.innerWidth;
+		height = window.innerHeight;
+		width = window.innerWidth;
+	}
+
+	if ((relativeToContainingBlock || relativeToNonStaticParent) && el !== window) {
+		// Adjust for translate()
+		container = container || el.parentNode;
+
+		// solves #1123 (see: https://stackoverflow.com/a/37953806/6088312)
+		// Not needed on <= IE11
+		if (!IE11OrLess) {
+			do {
+				if (
+					container &&
+					container.getBoundingClientRect &&
+					(
+						css(container, 'transform') !== 'none' ||
+						relativeToNonStaticParent &&
+						css(container, 'position') !== 'static'
+					)
+				) {
+					let containerRect = container.getBoundingClientRect();
+
+					// Set relative to edges of padding box of container
+					top -= containerRect.top + parseInt(css(container, 'border-top-width'));
+					left -= containerRect.left + parseInt(css(container, 'border-left-width'));
+					bottom = top + elRect.height;
+					right = left + elRect.width;
+
+					break;
+				}
+				/* jshint boss:true */
+			} while (container = container.parentNode);
+		}
+	}
+
+	if (undoScale && el !== window) {
+		// Adjust for scale()
+		let elMatrix = matrix(container || el),
+			scaleX = elMatrix && elMatrix.a,
+			scaleY = elMatrix && elMatrix.d;
+
+		if (elMatrix) {
+			top /= scaleY;
+			left /= scaleX;
+
+			width /= scaleX;
+			height /= scaleY;
+
+			bottom = top + height;
+			right = left + width;
+		}
+	}
+
+	return {
+		top: top,
+		left: left,
+		bottom: bottom,
+		right: right,
+		width: width,
+		height: height
+	};
+}
+
+/**
+ * Returns the content rect of the element (bounding rect minus border and padding)
+ * @param {HTMLElement} el
+ */
+function getContentRect(el) {
+	let rect = getRect(el);
+	const paddingLeft = parseInt(css(el, 'padding-left')),
+		paddingTop = parseInt(css(el, 'padding-top')),
+		paddingRight = parseInt(css(el, 'padding-right')),
+		paddingBottom = parseInt(css(el, 'padding-bottom'));
+	rect.top += paddingTop + parseInt(css(el, 'border-top-width'));
+	rect.left += paddingLeft + parseInt(css(el, 'border-left-width'));
+	// Client Width/Height includes padding only
+	rect.width = el.clientWidth - paddingLeft - paddingRight;
+	rect.height = el.clientHeight - paddingTop - paddingBottom;
+	rect.bottom = rect.top + rect.height;
+	rect.right = rect.left + rect.width;
+	return rect;
+}
+
+/**
+ * Checks if a side of an element is scrolled past a side of its parents
+ * @param  {HTMLElement}  el           The element who's side being scrolled out of view is in question
+ * @param  {String}       elSide       Side of the element in question ('top', 'left', 'right', 'bottom')
+ * @param  {String}       parentSide   Side of the parent in question ('top', 'left', 'right', 'bottom')
+ * @return {HTMLElement}               The parent scroll element that the el's side is scrolled past, or null if there is no such element
+ */
+function isScrolledPast(el, elSide, parentSide) {
+	let parent = getParentAutoScrollElement(el, true),
+		elSideVal = getRect(el)[elSide];
+
+	/* jshint boss:true */
+	while (parent) {
+		let parentSideVal = getRect(parent)[parentSide],
+			visible;
+
+		if (parentSide === 'top' || parentSide === 'left') {
+			visible = elSideVal >= parentSideVal;
+		} else {
+			visible = elSideVal <= parentSideVal;
+		}
+
+		if (!visible) return parent;
+
+		if (parent === getWindowScrollingElement()) break;
+
+		parent = getParentAutoScrollElement(parent, false);
+	}
+
+	return false;
+}
+
+
+
+/**
+ * Gets nth child of el, ignoring hidden children, sortable's elements (does not ignore clone if it's visible)
+ * and non-draggable elements
+ * @param  {HTMLElement} el       The parent element
+ * @param  {Number} childNum      The index of the child
+ * @param  {Object} options       Parent Sortable's options
+ * @return {HTMLElement}          The child at index childNum, or null if not found
+ */
+function getChild(el, childNum, options, includeDragEl) {
+	let currentChild = 0,
+		i = 0,
+		children = el.children;
+
+	while (i < children.length) {
+		if (
+			children[i].style.display !== 'none' &&
+			children[i] !== Sortable.ghost &&
+			(includeDragEl || children[i] !== Sortable.dragged) &&
+			closest(children[i], options.draggable, el, false)
+		) {
+			if (currentChild === childNum) {
+				return children[i];
+			}
+			currentChild++;
+		}
+
+		i++;
+	}
+	return null;
+}
+
+/**
+ * Gets the last child in the el, ignoring ghostEl or invisible elements (clones)
+ * @param  {HTMLElement} el       Parent element
+ * @param  {selector} selector    Any other elements that should be ignored
+ * @return {HTMLElement}          The last child, ignoring ghostEl
+ */
+function lastChild(el, selector) {
+	let last = el.lastElementChild;
+
+	while (
+		last &&
+		(
+			last === Sortable.ghost ||
+			css(last, 'display') === 'none' ||
+			selector && !matches(last, selector)
+		)
+	) {
+		last = last.previousElementSibling;
+	}
+
+	return last || null;
+}
+
+
+/**
+ * Returns the index of an element within its parent for a selected set of
+ * elements
+ * @param  {HTMLElement} el
+ * @param  {selector} selector
+ * @return {number}
+ */
+function index(el, selector) {
+	let index = 0;
+
+	if (!el || !el.parentNode) {
+		return -1;
+	}
+
+	/* jshint boss:true */
+	while (el = el.previousElementSibling) {
+		if ((el.nodeName.toUpperCase() !== 'TEMPLATE') && el !== Sortable.clone && (!selector || matches(el, selector))) {
+			index++;
+		}
+	}
+
+	return index;
+}
+
+/**
+ * Returns the scroll offset of the given element, added with all the scroll offsets of parent elements.
+ * The value is returned in real pixels.
+ * @param  {HTMLElement} el
+ * @return {Array}             Offsets in the format of [left, top]
+ */
+function getRelativeScrollOffset(el) {
+	let offsetLeft = 0,
+		offsetTop = 0,
+		winScroller = getWindowScrollingElement();
+
+	if (el) {
+		do {
+			let elMatrix = matrix(el),
+				scaleX = elMatrix.a,
+				scaleY = elMatrix.d;
+
+			offsetLeft += el.scrollLeft * scaleX;
+			offsetTop += el.scrollTop * scaleY;
+		} while (el !== winScroller && (el = el.parentNode));
+	}
+
+	return [offsetLeft, offsetTop];
+}
+
+/**
+ * Returns the index of the object within the given array
+ * @param  {Array} arr   Array that may or may not hold the object
+ * @param  {Object} obj  An object that has a key-value pair unique to and identical to a key-value pair in the object you want to find
+ * @return {Number}      The index of the object in the array, or -1
+ */
+function indexOfObject(arr, obj) {
+	for (let i in arr) {
+		if (!arr.hasOwnProperty(i)) continue;
+		for (let key in obj) {
+			if (obj.hasOwnProperty(key) && obj[key] === arr[i][key]) return Number(i);
+		}
+	}
+	return -1;
+}
+
+
+function getParentAutoScrollElement(el, includeSelf) {
+	// skip to window
+	if (!el || !el.getBoundingClientRect) return getWindowScrollingElement();
+
+	let elem = el;
+	let gotSelf = false;
+	do {
+		// we don't need to get elem css if it isn't even overflowing in the first place (performance)
+		if (elem.clientWidth < elem.scrollWidth || elem.clientHeight < elem.scrollHeight) {
+			let elemCSS = css(elem);
+			if (
+				elem.clientWidth < elem.scrollWidth && (elemCSS.overflowX == 'auto' || elemCSS.overflowX == 'scroll') ||
+				elem.clientHeight < elem.scrollHeight && (elemCSS.overflowY == 'auto' || elemCSS.overflowY == 'scroll')
+			) {
+				if (!elem.getBoundingClientRect || elem === document.body) return getWindowScrollingElement();
+
+				if (gotSelf || includeSelf) return elem;
+				gotSelf = true;
+			}
+		}
+	/* jshint boss:true */
+	} while (elem = elem.parentNode);
+
+	return getWindowScrollingElement();
+}
+
+function extend(dst, src) {
+	if (dst && src) {
+		for (let key in src) {
+			if (src.hasOwnProperty(key)) {
+				dst[key] = src[key];
+			}
+		}
+	}
+
+	return dst;
+}
+
+
+function isRectEqual(rect1, rect2) {
+	return Math.round(rect1.top) === Math.round(rect2.top) &&
+		Math.round(rect1.left) === Math.round(rect2.left) &&
+		Math.round(rect1.height) === Math.round(rect2.height) &&
+		Math.round(rect1.width) === Math.round(rect2.width);
+}
+
+
+let _throttleTimeout;
+function throttle(callback, ms) {
+	return function () {
+		if (!_throttleTimeout) {
+			let args = arguments,
+				_this = this;
+
+			if (args.length === 1) {
+				callback.call(_this, args[0]);
+			} else {
+				callback.apply(_this, args);
+			}
+
+			_throttleTimeout = setTimeout(function () {
+				_throttleTimeout = void 0;
+			}, ms);
+		}
+	};
+}
+
+
+function cancelThrottle() {
+	clearTimeout(_throttleTimeout);
+	_throttleTimeout = void 0;
+}
+
+
+function scrollBy(el, x, y) {
+	el.scrollLeft += x;
+	el.scrollTop += y;
+}
+
+
+function clone(el) {
+	let Polymer = window.Polymer;
+	let $ = window.jQuery || window.Zepto;
+
+	if (Polymer && Polymer.dom) {
+		return Polymer.dom(el).cloneNode(true);
+	}
+	else if ($) {
+		return $(el).clone(true)[0];
+	}
+	else {
+		return el.cloneNode(true);
+	}
+}
+
+
+function setRect(el, rect) {
+	css(el, 'position', 'absolute');
+	css(el, 'top', rect.top);
+	css(el, 'left', rect.left);
+	css(el, 'width', rect.width);
+	css(el, 'height', rect.height);
+}
+
+function unsetRect(el) {
+	css(el, 'position', '');
+	css(el, 'top', '');
+	css(el, 'left', '');
+	css(el, 'width', '');
+	css(el, 'height', '');
+}
+
+function getChildContainingRectFromElement(container, options, ghostEl) {
+    const rect = {};
+
+	Array.from(container.children).forEach(child => {
+		if (!closest(child, options.draggable, container, false) || child.animated || child === ghostEl) return;
+		const childRect = getRect(child);
+		rect.left = Math.min(rect.left ?? Infinity, childRect.left);
+		rect.top = Math.min(rect.top ?? Infinity, childRect.top);
+		rect.right = Math.max(rect.right ?? -Infinity, childRect.right);
+		rect.bottom = Math.max(rect.bottom ?? -Infinity, childRect.bottom);
+	});
+	rect.width = rect.right - rect.left;
+	rect.height = rect.bottom - rect.top;
+	rect.x = rect.left;
+	rect.y = rect.top;
+    return rect;
+}
+
+const expando = 'Sortable' + (new Date).getTime();
+
+
+export {
+	on,
+	off,
+	matches,
+	getParentOrHost,
+	closest,
+	toggleClass,
+	css,
+	matrix,
+	find,
+	getWindowScrollingElement,
+	getRect,
+	isScrolledPast,
+	getChild,
+	lastChild,
+	index,
+	getRelativeScrollOffset,
+	indexOfObject,
+	getParentAutoScrollElement,
+	extend,
+	isRectEqual,
+	throttle,
+	cancelThrottle,
+	scrollBy,
+	clone,
+	setRect,
+	unsetRect,
+	getContentRect,
+	getChildContainingRectFromElement,
+	expando
+};