1. Dart
2. dart:html
3. Notification
4. requireInteraction property

Notification class

1. Constructors
2. Notification
3. Properties
4. actions
5. badge
6. body
7. data
8. dir
9. hashCode
10. icon
11. image
12. lang
13. on
14. onClick
15. onClose
16. onError
17. onShow
18. renotify
19. requireInteraction
20. runtimeType
21. silent
22. tag
23. timestamp
24. title
25. vibrate
26. Methods
27. addEventListener
28. close
29. dispatchEvent
30. noSuchMethod
31. removeEventListener
32. toString
33. Operators
34. operator ==
35. Static properties
36. maxActions
37. permission
38. supported
39. Static methods
40. requestPermission
41. Constants
42. clickEvent
43. closeEvent
44. errorEvent
45. showEvent

bool get requireInteraction native;