1. Dart
2. dart:html
3. Sensor
4. hasReading property

Sensor class

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

bool get hasReading native;