1. Dart
2. dart:html
3. BroadcastChannel
4. onMessage property

##### BroadcastChannel class

1. Constructors
2. BroadcastChannel
3. Properties
4. hashCode
5. name
6. on
7. onMessage
8. runtimeType
9. Methods
10. addEventListener
11. close
12. dispatchEvent
13. noSuchMethod
14. postMessage
15. removeEventListener
16. toString
17. Operators
18. operator ==
19. Constants
20. messageEvent

description

# onMessage property Null safety

Stream<MessageEvent> onMessage

## Implementation

    Stream<MessageEvent> get onMessage => messageEvent.forTarget(this);