ReadyState constructor Null safety

1. Dart
2. dart:html
3. ReadyState
4. ReadyState constructor

ReadyState class

1. Constructors
2. ReadyState
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Constants
12. COMPLETE
13. INTERACTIVE
14. LOADING