1. Dart
2. dart:html
3. OrientationSensor
4. quaternion property

##### OrientationSensor class

1. Properties
2. activated
3. hashCode
4. hasReading
5. on
6. onError
7. quaternion
8. runtimeType
9. timestamp
10. Methods
11. addEventListener
12. dispatchEvent
13. noSuchMethod
14. populateMatrix
15. removeEventListener
16. start
17. stop
18. toString
19. Operators
20. operator ==

description

# quaternion property Null safety

List<num>? quaternion

## Implementation

    List<num>? get quaternion native;