1. Dart
2. dart:html
3. BackgroundFetchedEvent
4. updateUI method

##### BackgroundFetchedEvent class

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

description

# updateUI method Null safety

Future updateUI (

1. String title

)

## Implementation

    Future updateUI(String title) =>
        promiseToFuture(JS("", "#.updateUI(#)", this, title));