onDragEnd property

ElementStream<MouseEvent> onDragEnd
@DocsEditable(), @DomName('Element.ondragend')

A stream of dragend events fired when this element completes a drag operation.

Other resources

Drag and drop sample based on the tutorial from HTML5Rocks. Drag and drop specification from WHATWG.

Implementation 

@DomName('Element.ondragend')
@DocsEditable()
ElementStream<MouseEvent> get onDragEnd;