1. Dart
2. dart:html
3. SpeechSynthesis
4. speaking property

SpeechSynthesis class

1. Properties
2. hashCode
3. on
4. paused
5. pending
6. runtimeType
7. speaking
8. Methods
9. addEventListener
10. cancel
11. dispatchEvent
12. getVoices
13. noSuchMethod
14. pause
15. removeEventListener
16. resume
17. speak
18. toString
19. Operators
20. operator ==

bool get speaking native;