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beforeDrag

fires before dragging of an item has started

beforeDrag: (data: object, events: MouseEvent) => void | boolean;

Parameters:

  • data: object - data object. It can contain the following parameters:
    • start: string | number - the id of an item, from which the dragging process has started
    • source: array - an array with ids of dragged items
    • target: string | number - the id of a potential target item
  • events: MouseEvent - a native HTML event object

Returns:

Return false to block dragging of an item; otherwise, true.

Example

list.events.on("beforeDrag", function(data, events) {
    // your logic here
    return false;
});

Related sample: List. Events

Change log:

added in v7.0