1. Dart
2. dart:html
3. ScreenOrientation
4. changeEvent constant

##### ScreenOrientation class

1. Properties
2. angle
3. hashCode
4. on
5. onChange
6. runtimeType
7. type
8. Methods
9. addEventListener
10. dispatchEvent
11. lock
12. noSuchMethod
13. removeEventListener
14. toString
15. unlock
16. Operators
17. operator ==
18. Constants
19. changeEvent

description

# changeEvent constant Null safety

EventStreamProvider<Event> const changeEvent

## Implementation

    static const EventStreamProvider changeEvent =
        const EventStreamProvider('change')