Function Sortable

Sortable.js:1061–1156

* @class Sortable * @param {HTMLElement} el * @param {Object} [options]

(el, options)

   * @param  {Object}       [options]
   */
  function Sortable(el, options) {
    if (!(el && el.nodeType && el.nodeType === 1)) {
      throw "Sortable: `el` must be an HTMLElement, not ".concat({}.toString.call(el));
    }
    this.el = el; // root element
    this.options = options = _extends({}, options);

    // Export instance
    el[expando] = this;
    var defaults = {
      group: null,
      sort: true,
      disabled: false,
      store: null,
      handle: null,
      draggable: /^[uo]l$/i.test(el.nodeName) ? '>li' : '>*',
      swapThreshold: 1,
      // percentage; 0 <= x <= 1
      invertSwap: false,
      // invert always
      invertedSwapThreshold: null,
      // will be set to same as swapThreshold if default
      removeCloneOnHide: true,
      direction: function direction() {
        return _detectDirection(el, this.options);
      },
      ghostClass: 'sortable-ghost',
      chosenClass: 'sortable-chosen',
      dragClass: 'sortable-drag',
      ignore: 'a, img',
      filter: null,
      preventOnFilter: true,
      animation: 0,
      easing: null,
      setData: function setData(dataTransfer, dragEl) {
        dataTransfer.setData('Text', dragEl.textContent);
      },
      dropBubble: false,
      dragoverBubble: false,
      dataIdAttr: 'data-id',
      delay: 0,
      delayOnTouchOnly: false,
      touchStartThreshold: (Number.parseInt ? Number : window).parseInt(window.devicePixelRatio, 10) || 1,
      forceFallback: false,
      fallbackClass: 'sortable-fallback',
      fallbackOnBody: false,
      fallbackTolerance: 0,
      fallbackOffset: {
        x: 0,
        y: 0
      },
      // Disabled on Safari: #1571; Enabled on Safari IOS: #2244
      supportPointer: Sortable.supportPointer !== false && 'PointerEvent' in window && (!Safari || IOS),
      emptyInsertThreshold: 5
    };
    PluginManager.initializePlugins(this, el, defaults);

    // Set default options