description

# dragEnterEvent constant Null safety

EventStreamProvider<MouseEvent> const dragEnterEvent

A stream of `dragenter` events fired when a dragged object is first dragged over an element.

## Other resources

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

## Implementation

    static const EventStreamProvider dragEnterEvent =
        const EventStreamProvider('dragenter')