sortablejs/modular/sortable.esm.js

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.

/**!
 * Sortable 1.15.6
 * @author	RubaXa   <trash@rubaxa.org>
 * @author	owenm    <owen23355@gmail.com>
 * @license MIT
 */
function ownKeys(object, enumerableOnly) {
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}
function _objectSpread2(target) {
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    if (i % 2) {
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}
function _typeof(obj) {
  "@babel/helpers - typeof";

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}
function _defineProperty(obj, key, value) {
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      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }
  return obj;
}
function _extends() {
  _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];
      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }
    return target;
  };
  return _extends.apply(this, arguments);
}
function _objectWithoutPropertiesLoose(source, excluded) {
  if (source == null) return {};
  var target = {};
  var sourceKeys = Object.keys(source);
  var key, i;
  for (i = 0; i < sourceKeys.length; i++) {
    key = sourceKeys[i];
    if (excluded.indexOf(key) >= 0) continue;
    target[key] = source[key];
  }
  return target;
}
function _objectWithoutProperties(source, excluded) {
  if (source == null) return {};
  var target = _objectWithoutPropertiesLoose(source, excluded);
  var key, i;
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      if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;
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  }
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}
function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
}
function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) return _arrayLikeToArray(arr);
}
function _iterableToArray(iter) {
  if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
}
function _unsupportedIterableToArray(o, minLen) {
  if (!o) return;
  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
  var n = Object.prototype.toString.call(o).slice(8, -1);
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}
function _arrayLikeToArray(arr, len) {
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  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
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}
function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}

var version = "1.15.6";

function userAgent(pattern) {
  if (typeof window !== 'undefined' && window.navigator) {
    return !! /*@__PURE__*/navigator.userAgent.match(pattern);
  }
}
var IE11OrLess = userAgent(/(?:Trident.*rv[ :]?11\.|msie|iemobile|Windows Phone)/i);
var Edge = userAgent(/Edge/i);
var FireFox = userAgent(/firefox/i);
var Safari = userAgent(/safari/i) && !userAgent(/chrome/i) && !userAgent(/android/i);
var IOS = userAgent(/iP(ad|od|hone)/i);
var ChromeForAndroid = userAgent(/chrome/i) && userAgent(/android/i);

var 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.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;
}
var R_SPACE = /\s+/g;
function toggleClass(el, name, state) {
  if (el && name) {
    if (el.classList) {
      el.classList[state ? 'add' : 'remove'](name);
    } else {
      var className = (' ' + el.className + ' ').replace(R_SPACE, ' ').replace(' ' + name + ' ', ' ');
      el.className = (className + (state ? ' ' + name : '')).replace(R_SPACE, ' ');
    }
  }
}
function css(el, prop, val) {
  var 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) {
  var appliedTransforms = '';
  if (typeof el === 'string') {
    appliedTransforms = el;
  } else {
    do {
      var transform = css(el, 'transform');
      if (transform && transform !== 'none') {
        appliedTransforms = transform + ' ' + appliedTransforms;
      }
      /* jshint boss:true */
    } while (!selfOnly && (el = el.parentNode));
  }
  var matrixFn = window.DOMMatrix || window.WebKitCSSMatrix || window.CSSMatrix || window.MSCSSMatrix;
  /*jshint -W056 */
  return matrixFn && new matrixFn(appliedTransforms);
}
function find(ctx, tagName, iterator) {
  if (ctx) {
    var list = ctx.getElementsByTagName(tagName),
      i = 0,
      n = list.length;
    if (iterator) {
      for (; i < n; i++) {
        iterator(list[i], i);
      }
    }
    return list;
  }
  return [];
}
function getWindowScrollingElement() {
  var 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;
  var 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')) {
          var 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()
    var 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
  };
}

/**
 * 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) {
  var parent = getParentAutoScrollElement(el, true),
    elSideVal = getRect(el)[elSide];

  /* jshint boss:true */
  while (parent) {
    var parentSideVal = getRect(parent)[parentSide],
      visible = void 0;
    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) {
  var 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) {
  var 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) {
  var 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) {
  var offsetLeft = 0,
    offsetTop = 0,
    winScroller = getWindowScrollingElement();
  if (el) {
    do {
      var 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 (var i in arr) {
    if (!arr.hasOwnProperty(i)) continue;
    for (var 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();
  var elem = el;
  var 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) {
      var 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 (var 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);
}
var _throttleTimeout;
function throttle(callback, ms) {
  return function () {
    if (!_throttleTimeout) {
      var 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) {
  var Polymer = window.Polymer;
  var $ = window.jQuery || window.Zepto;
  if (Polymer && Polymer.dom) {
    return Polymer.dom(el).cloneNode(true);
  } else if ($) {
    return $(el).clone(true)[0];
  } else {
    return el.cloneNode(true);
  }
}
function setRect(el, rect) {
  css(el, 'position', 'absolute');
  css(el, 'top', rect.top);
  css(el, 'left', rect.left);
  css(el, 'width', rect.width);
  css(el, 'height', rect.height);
}
function unsetRect(el) {
  css(el, 'position', '');
  css(el, 'top', '');
  css(el, 'left', '');
  css(el, 'width', '');
  css(el, 'height', '');
}
function getChildContainingRectFromElement(container, options, ghostEl) {
  var rect = {};
  Array.from(container.children).forEach(function (child) {
    var _rect$left, _rect$top, _rect$right, _rect$bottom;
    if (!closest(child, options.draggable, container, false) || child.animated || child === ghostEl) return;
    var childRect = getRect(child);
    rect.left = Math.min((_rect$left = rect.left) !== null && _rect$left !== void 0 ? _rect$left : Infinity, childRect.left);
    rect.top = Math.min((_rect$top = rect.top) !== null && _rect$top !== void 0 ? _rect$top : Infinity, childRect.top);
    rect.right = Math.max((_rect$right = rect.right) !== null && _rect$right !== void 0 ? _rect$right : -Infinity, childRect.right);
    rect.bottom = Math.max((_rect$bottom = rect.bottom) !== null && _rect$bottom !== void 0 ? _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;
}
var expando = 'Sortable' + new Date().getTime();

function AnimationStateManager() {
  var animationStates = [],
    animationCallbackId;
  return {
    captureAnimationState: function captureAnimationState() {
      animationStates = [];
      if (!this.options.animation) return;
      var children = [].slice.call(this.el.children);
      children.forEach(function (child) {
        if (css(child, 'display') === 'none' || child === Sortable.ghost) return;
        animationStates.push({
          target: child,
          rect: getRect(child)
        });
        var fromRect = _objectSpread2({}, animationStates[animationStates.length - 1].rect);

        // If animating: compensate for current animation
        if (child.thisAnimationDuration) {
          var childMatrix = matrix(child, true);
          if (childMatrix) {
            fromRect.top -= childMatrix.f;
            fromRect.left -= childMatrix.e;
          }
        }
        child.fromRect = fromRect;
      });
    },
    addAnimationState: function addAnimationState(state) {
      animationStates.push(state);
    },
    removeAnimationState: function removeAnimationState(target) {
      animationStates.splice(indexOfObject(animationStates, {
        target: target
      }), 1);
    },
    animateAll: function animateAll(callback) {
      var _this = this;
      if (!this.options.animation) {
        clearTimeout(animationCallbackId);
        if (typeof callback === 'function') callback();
        return;
      }
      var animating = false,
        animationTime = 0;
      animationStates.forEach(function (state) {
        var time = 0,
          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: function animate(target, currentRect, toRect, duration) {
      if (duration) {
        css(target, 'transition', '');
        css(target, 'transform', '');
        var 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;
}

var plugins = [];
var defaults = {
  initializeByDefault: true
};
var PluginManager = {
  mount: function mount(plugin) {
    // Set default static properties
    for (var option in defaults) {
      if (defaults.hasOwnProperty(option) && !(option in plugin)) {
        plugin[option] = defaults[option];
      }
    }
    plugins.forEach(function (p) {
      if (p.pluginName === plugin.pluginName) {
        throw "Sortable: Cannot mount plugin ".concat(plugin.pluginName, " more than once");
      }
    });
    plugins.push(plugin);
  },
  pluginEvent: function pluginEvent(eventName, sortable, evt) {
    var _this = this;
    this.eventCanceled = false;
    evt.cancel = function () {
      _this.eventCanceled = true;
    };
    var eventNameGlobal = eventName + 'Global';
    plugins.forEach(function (plugin) {
      if (!sortable[plugin.pluginName]) return;
      // Fire global events if it exists in this sortable
      if (sortable[plugin.pluginName][eventNameGlobal]) {
        sortable[plugin.pluginName][eventNameGlobal](_objectSpread2({
          sortable: 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](_objectSpread2({
          sortable: sortable
        }, evt));
      }
    });
  },
  initializePlugins: function initializePlugins(sortable, el, defaults, options) {
    plugins.forEach(function (plugin) {
      var pluginName = plugin.pluginName;
      if (!sortable.options[pluginName] && !plugin.initializeByDefault) return;
      var initialized = new plugin(sortable, el, sortable.options);
      initialized.sortable = sortable;
      initialized.options = sortable.options;
      sortable[pluginName] = initialized;

      // Add default options from plugin
      _extends(defaults, initialized.defaults);
    });
    for (var option in sortable.options) {
      if (!sortable.options.hasOwnProperty(option)) continue;
      var modified = this.modifyOption(sortable, option, sortable.options[option]);
      if (typeof modified !== 'undefined') {
        sortable.options[option] = modified;
      }
    }
  },
  getEventProperties: function getEventProperties(name, sortable) {
    var eventProperties = {};
    plugins.forEach(function (plugin) {
      if (typeof plugin.eventProperties !== 'function') return;
      _extends(eventProperties, plugin.eventProperties.call(sortable[plugin.pluginName], name));
    });
    return eventProperties;
  },
  modifyOption: function modifyOption(sortable, name, value) {
    var modifiedValue;
    plugins.forEach(function (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;
  }
};

function dispatchEvent(_ref) {
  var sortable = _ref.sortable,
    rootEl = _ref.rootEl,
    name = _ref.name,
    targetEl = _ref.targetEl,
    cloneEl = _ref.cloneEl,
    toEl = _ref.toEl,
    fromEl = _ref.fromEl,
    oldIndex = _ref.oldIndex,
    newIndex = _ref.newIndex,
    oldDraggableIndex = _ref.oldDraggableIndex,
    newDraggableIndex = _ref.newDraggableIndex,
    originalEvent = _ref.originalEvent,
    putSortable = _ref.putSortable,
    extraEventProperties = _ref.extraEventProperties;
  sortable = sortable || rootEl && rootEl[expando];
  if (!sortable) return;
  var 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;
  var allEventProperties = _objectSpread2(_objectSpread2({}, extraEventProperties), PluginManager.getEventProperties(name, sortable));
  for (var option in allEventProperties) {
    evt[option] = allEventProperties[option];
  }
  if (rootEl) {
    rootEl.dispatchEvent(evt);
  }
  if (options[onName]) {
    options[onName].call(sortable, evt);
  }
}

var _excluded = ["evt"];
var pluginEvent = function pluginEvent(eventName, sortable) {
  var _ref = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
    originalEvent = _ref.evt,
    data = _objectWithoutProperties(_ref, _excluded);
  PluginManager.pluginEvent.bind(Sortable)(eventName, sortable, _objectSpread2({
    dragEl: dragEl,
    parentEl: parentEl,
    ghostEl: ghostEl,
    rootEl: rootEl,
    nextEl: nextEl,
    lastDownEl: lastDownEl,
    cloneEl: cloneEl,
    cloneHidden: cloneHidden,
    dragStarted: moved,
    putSortable: putSortable,
    activeSortable: Sortable.active,
    originalEvent: originalEvent,
    oldIndex: oldIndex,
    oldDraggableIndex: oldDraggableIndex,
    newIndex: newIndex,
    newDraggableIndex: newDraggableIndex,
    hideGhostForTarget: _hideGhostForTarget,
    unhideGhostForTarget: _unhideGhostForTarget,
    cloneNowHidden: function cloneNowHidden() {
      cloneHidden = true;
    },
    cloneNowShown: function cloneNowShown() {
      cloneHidden = false;
    },
    dispatchSortableEvent: function dispatchSortableEvent(name) {
      _dispatchEvent({
        sortable: sortable,
        name: name,
        originalEvent: originalEvent
      });
    }
  }, data));
};
function _dispatchEvent(info) {
  dispatchEvent(_objectSpread2({
    putSortable: putSortable,
    cloneEl: cloneEl,
    targetEl: dragEl,
    rootEl: rootEl,
    oldIndex: oldIndex,
    oldDraggableIndex: oldDraggableIndex,
    newIndex: newIndex,
    newDraggableIndex: newDraggableIndex
  }, info));
}
var dragEl,
  parentEl,
  ghostEl,
  rootEl,
  nextEl,
  lastDownEl,
  cloneEl,
  cloneHidden,
  oldIndex,
  newIndex,
  oldDraggableIndex,
  newDraggableIndex,
  activeGroup,
  putSortable,
  awaitingDragStarted = false,
  ignoreNextClick = false,
  sortables = [],
  tapEvt,
  touchEvt,
  lastDx,
  lastDy,
  tapDistanceLeft,
  tapDistanceTop,
  moved,
  lastTarget,
  lastDirection,
  pastFirstInvertThresh = false,
  isCircumstantialInvert = false,
  targetMoveDistance,
  // For positioning ghost absolutely
  ghostRelativeParent,
  ghostRelativeParentInitialScroll = [],
  // (left, top)

  _silent = false,
  savedInputChecked = [];

/** @const */
var documentExists = typeof document !== 'undefined',
  PositionGhostAbsolutely = IOS,
  CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',
  // This will not pass for IE9, because IE9 DnD only works on anchors
  supportDraggable = documentExists && !ChromeForAndroid && !IOS && 'draggable' in document.createElement('div'),
  supportCssPointerEvents = function () {
    if (!documentExists) return;
    // false when <= IE11
    if (IE11OrLess) {
      return false;
    }
    var el = document.createElement('x');
    el.style.cssText = 'pointer-events:auto';
    return el.style.pointerEvents === 'auto';
  }(),
  _detectDirection = function _detectDirection(el, options) {
    var elCSS = css(el),
      elWidth = parseInt(elCSS.width) - parseInt(elCSS.paddingLeft) - parseInt(elCSS.paddingRight) - parseInt(elCSS.borderLeftWidth) - parseInt(elCSS.borderRightWidth),
      child1 = getChild(el, 0, options),
      child2 = getChild(el, 1, options),
      firstChildCSS = child1 && css(child1),
      secondChildCSS = child2 && css(child2),
      firstChildWidth = firstChildCSS && parseInt(firstChildCSS.marginLeft) + parseInt(firstChildCSS.marginRight) + getRect(child1).width,
      secondChildWidth = secondChildCSS && parseInt(secondChildCSS.marginLeft) + parseInt(secondChildCSS.marginRight) + getRect(child2).width;
    if (elCSS.display === 'flex') {
      return elCSS.flexDirection === 'column' || elCSS.flexDirection === 'column-reverse' ? 'vertical' : 'horizontal';
    }
    if (elCSS.display === 'grid') {
      return elCSS.gridTemplateColumns.split(' ').length <= 1 ? 'vertical' : 'horizontal';
    }
    if (child1 && firstChildCSS["float"] && firstChildCSS["float"] !== 'none') {
      var touchingSideChild2 = firstChildCSS["float"] === 'left' ? 'left' : 'right';
      return child2 && (secondChildCSS.clear === 'both' || secondChildCSS.clear === touchingSideChild2) ? 'vertical' : 'horizontal';
    }
    return child1 && (firstChildCSS.display === 'block' || firstChildCSS.display === 'flex' || firstChildCSS.display === 'table' || firstChildCSS.display === 'grid' || firstChildWidth >= elWidth && elCSS[CSSFloatProperty] === 'none' || child2 && elCSS[CSSFloatProperty] === 'none' && firstChildWidth + secondChildWidth > elWidth) ? 'vertical' : 'horizontal';
  },
  _dragElInRowColumn = function _dragElInRowColumn(dragRect, targetRect, vertical) {
    var dragElS1Opp = vertical ? dragRect.left : dragRect.top,
      dragElS2Opp = vertical ? dragRect.right : dragRect.bottom,
      dragElOppLength = vertical ? dragRect.width : dragRect.height,
      targetS1Opp = vertical ? targetRect.left : targetRect.top,
      targetS2Opp = vertical ? targetRect.right : targetRect.bottom,
      targetOppLength = vertical ? targetRect.width : targetRect.height;
    return dragElS1Opp === targetS1Opp || dragElS2Opp === targetS2Opp || dragElS1Opp + dragElOppLength / 2 === targetS1Opp + targetOppLength / 2;
  },
  /**
   * Detects first nearest empty sortable to X and Y position using emptyInsertThreshold.
   * @param  {Number} x      X position
   * @param  {Number} y      Y position
   * @return {HTMLElement}   Element of the first found nearest Sortable
   */
  _detectNearestEmptySortable = function _detectNearestEmptySortable(x, y) {
    var ret;
    sortables.some(function (sortable) {
      var threshold = sortable[expando].options.emptyInsertThreshold;
      if (!threshold || lastChild(sortable)) return;
      var rect = getRect(sortable),
        insideHorizontally = x >= rect.left - threshold && x <= rect.right + threshold,
        insideVertically = y >= rect.top - threshold && y <= rect.bottom + threshold;
      if (insideHorizontally && insideVertically) {
        return ret = sortable;
      }
    });
    return ret;
  },
  _prepareGroup = function _prepareGroup(options) {
    function toFn(value, pull) {
      return function (to, from, dragEl, evt) {
        var sameGroup = to.options.group.name && from.options.group.name && to.options.group.name === from.options.group.name;
        if (value == null && (pull || sameGroup)) {
          // Default pull value
          // Default pull and put value if same group
          return true;
        } else if (value == null || value === false) {
          return false;
        } else if (pull && value === 'clone') {
          return value;
        } else if (typeof value === 'function') {
          return toFn(value(to, from, dragEl, evt), pull)(to, from, dragEl, evt);
        } else {
          var otherGroup = (pull ? to : from).options.group.name;
          return value === true || typeof value === 'string' && value === otherGroup || value.join && value.indexOf(otherGroup) > -1;
        }
      };
    }
    var group = {};
    var originalGroup = options.group;
    if (!originalGroup || _typeof(originalGroup) != 'object') {
      originalGroup = {
        name: originalGroup
      };
    }
    group.name = originalGroup.name;
    group.checkPull = toFn(originalGroup.pull, true);
    group.checkPut = toFn(originalGroup.put);
    group.revertClone = originalGroup.revertClone;
    options.group = group;
  },
  _hideGhostForTarget = function _hideGhostForTarget() {
    if (!supportCssPointerEvents && ghostEl) {
      css(ghostEl, 'display', 'none');
    }
  },
  _unhideGhostForTarget = function _unhideGhostForTarget() {
    if (!supportCssPointerEvents && ghostEl) {
      css(ghostEl, 'display', '');
    }
  };

// #1184 fix - Prevent click event on fallback if dragged but item not changed position
if (documentExists && !ChromeForAndroid) {
  document.addEventListener('click', function (evt) {
    if (ignoreNextClick) {
      evt.preventDefault();
      evt.stopPropagation && evt.stopPropagation();
      evt.stopImmediatePropagation && evt.stopImmediatePropagation();
      ignoreNextClick = false;
      return false;
    }
  }, true);
}
var nearestEmptyInsertDetectEvent = function nearestEmptyInsertDetectEvent(evt) {
  if (dragEl) {
    evt = evt.touches ? evt.touches[0] : evt;
    var nearest = _detectNearestEmptySortable(evt.clientX, evt.clientY);
    if (nearest) {
      // Create imitation event
      var event = {};
      for (var i in evt) {
        if (evt.hasOwnProperty(i)) {
          event[i] = evt[i];
        }
      }
      event.target = event.rootEl = nearest;
      event.preventDefault = void 0;
      event.stopPropagation = void 0;
      nearest[expando]._onDragOver(event);
    }
  }
};
var _checkOutsideTargetEl = function _checkOutsideTargetEl(evt) {
  if (dragEl) {
    dragEl.parentNode[expando]._isOutsideThisEl(evt.target);
  }
};

/**
 * @class  Sortable
 * @param  {HTMLElement}  el
 * @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
  for (var name in defaults) {
    !(name in options) && (options[name] = defaults[name]);
  }
  _prepareGroup(options);

  // Bind all private methods
  for (var fn in this) {
    if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
      this[fn] = this[fn].bind(this);
    }
  }

  // Setup drag mode
  this.nativeDraggable = options.forceFallback ? false : supportDraggable;
  if (this.nativeDraggable) {
    // Touch start threshold cannot be greater than the native dragstart threshold
    this.options.touchStartThreshold = 1;
  }

  // Bind events
  if (options.supportPointer) {
    on(el, 'pointerdown', this._onTapStart);
  } else {
    on(el, 'mousedown', this._onTapStart);
    on(el, 'touchstart', this._onTapStart);
  }
  if (this.nativeDraggable) {
    on(el, 'dragover', this);
    on(el, 'dragenter', this);
  }
  sortables.push(this.el);

  // Restore sorting
  options.store && options.store.get && this.sort(options.store.get(this) || []);

  // Add animation state manager
  _extends(this, AnimationStateManager());
}
Sortable.prototype = /** @lends Sortable.prototype */{
  constructor: Sortable,
  _isOutsideThisEl: function _isOutsideThisEl(target) {
    if (!this.el.contains(target) && target !== this.el) {
      lastTarget = null;
    }
  },
  _getDirection: function _getDirection(evt, target) {
    return typeof this.options.direction === 'function' ? this.options.direction.call(this, evt, target, dragEl) : this.options.direction;
  },
  _onTapStart: function _onTapStart( /** Event|TouchEvent */evt) {
    if (!evt.cancelable) return;
    var _this = this,
      el = this.el,
      options = this.options,
      preventOnFilter = options.preventOnFilter,
      type = evt.type,
      touch = evt.touches && evt.touches[0] || evt.pointerType && evt.pointerType === 'touch' && evt,
      target = (touch || evt).target,
      originalTarget = evt.target.shadowRoot && (evt.path && evt.path[0] || evt.composedPath && evt.composedPath()[0]) || target,
      filter = options.filter;
    _saveInputCheckedState(el);

    // Don't trigger start event when an element is been dragged, otherwise the evt.oldindex always wrong when set option.group.
    if (dragEl) {
      return;
    }
    if (/mousedown|pointerdown/.test(type) && evt.button !== 0 || options.disabled) {
      return; // only left button and enabled
    }

    // cancel dnd if original target is content editable
    if (originalTarget.isContentEditable) {
      return;
    }

    // Safari ignores further event handling after mousedown
    if (!this.nativeDraggable && Safari && target && target.tagName.toUpperCase() === 'SELECT') {
      return;
    }
    target = closest(target, options.draggable, el, false);
    if (target && target.animated) {
      return;
    }
    if (lastDownEl === target) {
      // Ignoring duplicate `down`
      return;
    }

    // Get the index of the dragged element within its parent
    oldIndex = index(target);
    oldDraggableIndex = index(target, options.draggable);

    // Check filter
    if (typeof filter === 'function') {
      if (filter.call(this, evt, target, this)) {
        _dispatchEvent({
          sortable: _this,
          rootEl: originalTarget,
          name: 'filter',
          targetEl: target,
          toEl: el,
          fromEl: el
        });
        pluginEvent('filter', _this, {
          evt: evt
        });
        preventOnFilter && evt.preventDefault();
        return; // cancel dnd
      }
    } else if (filter) {
      filter = filter.split(',').some(function (criteria) {
        criteria = closest(originalTarget, criteria.trim(), el, false);
        if (criteria) {
          _dispatchEvent({
            sortable: _this,
            rootEl: criteria,
            name: 'filter',
            targetEl: target,
            fromEl: el,
            toEl: el
          });
          pluginEvent('filter', _this, {
            evt: evt
          });
          return true;
        }
      });
      if (filter) {
        preventOnFilter && evt.preventDefault();
        return; // cancel dnd
      }
    }
    if (options.handle && !closest(originalTarget, options.handle, el, false)) {
      return;
    }

    // Prepare `dragstart`
    this._prepareDragStart(evt, touch, target);
  },
  _prepareDragStart: function _prepareDragStart( /** Event */evt, /** Touch */touch, /** HTMLElement */target) {
    var _this = this,
      el = _this.el,
      options = _this.options,
      ownerDocument = el.ownerDocument,
      dragStartFn;
    if (target && !dragEl && target.parentNode === el) {
      var dragRect = getRect(target);
      rootEl = el;
      dragEl = target;
      parentEl = dragEl.parentNode;
      nextEl = dragEl.nextSibling;
      lastDownEl = target;
      activeGroup = options.group;
      Sortable.dragged = dragEl;
      tapEvt = {
        target: dragEl,
        clientX: (touch || evt).clientX,
        clientY: (touch || evt).clientY
      };
      tapDistanceLeft = tapEvt.clientX - dragRect.left;
      tapDistanceTop = tapEvt.clientY - dragRect.top;
      this._lastX = (touch || evt).clientX;
      this._lastY = (touch || evt).clientY;
      dragEl.style['will-change'] = 'all';
      dragStartFn = function dragStartFn() {
        pluginEvent('delayEnded', _this, {
          evt: evt
        });
        if (Sortable.eventCanceled) {
          _this._onDrop();
          return;
        }
        // Delayed drag has been triggered
        // we can re-enable the events: touchmove/mousemove
        _this._disableDelayedDragEvents();
        if (!FireFox && _this.nativeDraggable) {
          dragEl.draggable = true;
        }

        // Bind the events: dragstart/dragend
        _this._triggerDragStart(evt, touch);

        // Drag start event
        _dispatchEvent({
          sortable: _this,
          name: 'choose',
          originalEvent: evt
        });

        // Chosen item
        toggleClass(dragEl, options.chosenClass, true);
      };

      // Disable "draggable"
      options.ignore.split(',').forEach(function (criteria) {
        find(dragEl, criteria.trim(), _disableDraggable);
      });
      on(ownerDocument, 'dragover', nearestEmptyInsertDetectEvent);
      on(ownerDocument, 'mousemove', nearestEmptyInsertDetectEvent);
      on(ownerDocument, 'touchmove', nearestEmptyInsertDetectEvent);
      if (options.supportPointer) {
        on(ownerDocument, 'pointerup', _this._onDrop);
        // Native D&D triggers pointercancel
        !this.nativeDraggable && on(ownerDocument, 'pointercancel', _this._onDrop);
      } else {
        on(ownerDocument, 'mouseup', _this._onDrop);
        on(ownerDocument, 'touchend', _this._onDrop);
        on(ownerDocument, 'touchcancel', _this._onDrop);
      }

      // Make dragEl draggable (must be before delay for FireFox)
      if (FireFox && this.nativeDraggable) {
        this.options.touchStartThreshold = 4;
        dragEl.draggable = true;
      }
      pluginEvent('delayStart', this, {
        evt: evt
      });

      // Delay is impossible for native DnD in Edge or IE
      if (options.delay && (!options.delayOnTouchOnly || touch) && (!this.nativeDraggable || !(Edge || IE11OrLess))) {
        if (Sortable.eventCanceled) {
          this._onDrop();
          return;
        }
        // If the user moves the pointer or let go the click or touch
        // before the delay has been reached:
        // disable the delayed drag
        if (options.supportPointer) {
          on(ownerDocument, 'pointerup', _this._disableDelayedDrag);
          on(ownerDocument, 'pointercancel', _this._disableDelayedDrag);
        } else {
          on(ownerDocument, 'mouseup', _this._disableDelayedDrag);
          on(ownerDocument, 'touchend', _this._disableDelayedDrag);
          on(ownerDocument, 'touchcancel', _this._disableDelayedDrag);
        }
        on(ownerDocument, 'mousemove', _this._delayedDragTouchMoveHandler);
        on(ownerDocument, 'touchmove', _this._delayedDragTouchMoveHandler);
        options.supportPointer && on(ownerDocument, 'pointermove', _this._delayedDragTouchMoveHandler);
        _this._dragStartTimer = setTimeout(dragStartFn, options.delay);
      } else {
        dragStartFn();
      }
    }
  },
  _delayedDragTouchMoveHandler: function _delayedDragTouchMoveHandler( /** TouchEvent|PointerEvent **/e) {
    var touch = e.touches ? e.touches[0] : e;
    if (Math.max(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY)) >= Math.floor(this.options.touchStartThreshold / (this.nativeDraggable && window.devicePixelRatio || 1))) {
      this._disableDelayedDrag();
    }
  },
  _disableDelayedDrag: function _disableDelayedDrag() {
    dragEl && _disableDraggable(dragEl);
    clearTimeout(this._dragStartTimer);
    this._disableDelayedDragEvents();
  },
  _disableDelayedDragEvents: function _disableDelayedDragEvents() {
    var ownerDocument = this.el.ownerDocument;
    off(ownerDocument, 'mouseup', this._disableDelayedDrag);
    off(ownerDocument, 'touchend', this._disableDelayedDrag);
    off(ownerDocument, 'touchcancel', this._disableDelayedDrag);
    off(ownerDocument, 'pointerup', this._disableDelayedDrag);
    off(ownerDocument, 'pointercancel', this._disableDelayedDrag);
    off(ownerDocument, 'mousemove', this._delayedDragTouchMoveHandler);
    off(ownerDocument, 'touchmove', this._delayedDragTouchMoveHandler);
    off(ownerDocument, 'pointermove', this._delayedDragTouchMoveHandler);
  },
  _triggerDragStart: function _triggerDragStart( /** Event */evt, /** Touch */touch) {
    touch = touch || evt.pointerType == 'touch' && evt;
    if (!this.nativeDraggable || touch) {
      if (this.options.supportPointer) {
        on(document, 'pointermove', this._onTouchMove);
      } else if (touch) {
        on(document, 'touchmove', this._onTouchMove);
      } else {
        on(document, 'mousemove', this._onTouchMove);
      }
    } else {
      on(dragEl, 'dragend', this);
      on(rootEl, 'dragstart', this._onDragStart);
    }
    try {
      if (document.selection) {
        _nextTick(function () {
          document.selection.empty();
        });
      } else {
        window.getSelection().removeAllRanges(