Function dragula

dragula.js:9–496

(initialContainers, options)

var documentElement = doc.documentElement;

function dragula (initialContainers, options) {
  var len = arguments.length;
  if (len === 1 && Array.isArray(initialContainers) === false) {
    options = initialContainers;
    initialContainers = [];
  }
  var _mirror; // mirror image
  var _source; // source container
  var _item; // item being dragged
  var _offsetX; // reference x
  var _offsetY; // reference y
  var _moveX; // reference move x
  var _moveY; // reference move y
  var _initialSibling; // reference sibling when grabbed
  var _currentSibling; // reference sibling now
  var _copy; // item used for copying
  var _renderTimer; // timer for setTimeout renderMirrorImage
  var _lastDropTarget = null; // last container item was over
  var _grabbed; // holds mousedown context until first mousemove

  var o = options || {};
  if (o.moves === void 0) { o.moves = always; }
  if (o.accepts === void 0) { o.accepts = always; }
  if (o.invalid === void 0) { o.invalid = invalidTarget; }
  if (o.containers === void 0) { o.containers = initialContainers || []; }
  if (o.isContainer === void 0) { o.isContainer = never; }
  if (o.copy === void 0) { o.copy = false; }
  if (o.copySortSource === void 0) { o.copySortSource = false; }
  if (o.revertOnSpill === void 0) { o.revertOnSpill = false; }
  if (o.removeOnSpill === void 0) { o.removeOnSpill = false; }
  if (o.direction === void 0) { o.direction = 'vertical'; }
  if (o.ignoreInputTextSelection === void 0) { o.ignoreInputTextSelection = true; }
  if (o.mirrorContainer === void 0) { o.mirrorContainer = doc.body; }

  var drake = emitter({
    containers: o.containers,
    start: manualStart,
    end: end,
    cancel: cancel,
    remove: remove,
    destroy: destroy,
    canMove: canMove,
    dragging: false
  });

  if (o.removeOnSpill === true) {
    drake.on('over', spillOver).on('out', spillOut);
  }

  events();

  return drake;

  function isContainer (el) {
    return drake.containers.indexOf(el) !== -1 || o.isContainer(el);
  }

  function events (remove) {