1. Dart
2. dart:html
3. TransitionEvent
4. elapsedTime property

##### TransitionEvent class

1. Constructors
2. TransitionEvent
3. Properties
4. bubbles
5. cancelable
6. composed
7. currentTarget
8. defaultPrevented
9. elapsedTime
10. eventPhase
11. hashCode
12. isTrusted
13. matchingTarget
14. path
15. propertyName
16. pseudoElement
17. runtimeType
18. target
19. timeStamp
20. type
21. Methods
22. composedPath
23. noSuchMethod
24. preventDefault
25. stopImmediatePropagation
26. stopPropagation
27. toString
28. Operators
29. operator ==

description

# elapsedTime property Null safety

num? elapsedTime

## Implementation

    num? get elapsedTime native;