1. Dart
2. dart:html
3. AnimationEffectTimingReadOnly
4. duration property

##### AnimationEffectTimingReadOnly class

1. Properties
2. delay
3. direction
4. duration
5. easing
6. endDelay
7. fill
8. hashCode
9. iterations
10. iterationStart
11. runtimeType
12. Methods
13. noSuchMethod
14. toString
15. Operators
16. operator ==

description

# duration property Null safety

Object? duration

## Implementation

    Object? get duration native;