onDragStart property
Stream<MouseEvent> onDragStartStream of dragstart events handled by this Window.
Source
@DomName('Window.ondragstart')
@DocsEditable()
Stream<MouseEvent> get onDragStart => Element.dragStartEvent.forTarget(this);
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-html/Window/onDragStart.html