FetchEvent.FetchEvent()

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The FetchEvent() constructor creates a new FetchEvent object.

Syntax

var myFetchEvent = new FetchEvent(type, init);

Parameters

type
The type of the Event.
init Optional
An options object containing any custom settings that you want to apply to the event object. Options are as follows:
  • request: The Request object that would have triggered the event handler.
  • clientId: The Client that the current service worker is controlling. This property is not yet implemented in Chrome.
  • isReload: A Boolean that signifies whether the page was reloaded or not when the event was dispatched. true if yes, and false if not. Typically, pressing the refresh button in a browser is a reload, while clicking a link and pressing the back button is not. If not present, it defaults to false.

Specifications

Specification Status Comment
Service Workers
The definition of 'FetchEvent' in that specification.
Working Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome Full support 40Edge Full support YesFirefox Full support 44
Notes
Full support 44
Notes
Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)
IE No support NoOpera Full support 27Safari No support NoWebView Android Full support 40Chrome Android Full support 40Edge Mobile ? Firefox Android Full support 44Opera Android Full support 27Safari iOS No support NoSamsung Internet Android Full support 4.0

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.

See also

Document Tags and Contributors

Contributors to this page: connorshea, chrisdavidmills, dgashmdn, jpmedley, teoli, kscarfone
Last updated by: connorshea,