1. Dart
2. dart:html
3. FetchEvent
4. preloadResponse property

FetchEvent class

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

Future get preloadResponse =>
    promiseToFuture(JS("", "#.preloadResponse", this));