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onBeforeDrop

fires before a dragged element is released over the droppable area

function onBeforeDrop(
    // the drag-n-drop context
    context: object,
    // an HTML event object
    native_event: Event
): boolean

Returns

Section titled “Returns”

boolean returning false will prevent further drag-and-drop processing

Example

Section titled “Example”
grid.attachEvent("onBeforeDrop", function(context, native_event){
    //... some code here ...
    // return false to block operation
    return true;
});

also check the next samples:

Details

Section titled “Details”

The drag-and-drop context can have the following properties:

  • from - the source object
  • to - the target object
  • source - the ID of the dragged item(s)
  • target - the ID of the drop target, null for drop on empty space
  • start - the ID from which drag-n-drop was started

See also

Section titled “See also”

Articles

API