1. Dart
2. dart:html
3. VRDisplay
4. isPresenting property

VRDisplay class

1. Properties
2. capabilities
3. depthFar
4. depthNear
5. displayId
6. displayName
7. isPresenting
8. stageParameters
9. hashCode
10. on
11. runtimeType
12. Methods
13. cancelAnimationFrame
14. exitPresent
15. getEyeParameters
16. getFrameData
17. getLayers
18. requestAnimationFrame
19. requestPresent
20. submitFrame
21. addEventListener
22. dispatchEvent
23. noSuchMethod
24. removeEventListener
25. toString
26. Operators
27. operator ==

bool get isPresenting native;