description

# onDragOver property Null safety

ElementStream<MouseEvent> onDragOver
override

A stream of `dragover` events fired when a dragged object is currently being dragged over this element.

## Other resources

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

## Implementation

    ElementStream<MouseEvent> get onDragOver => dragOverEvent.forElement(this);