This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
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
: TheRequest
object that would have triggered the event handler.clientId
: TheClient
that the current service worker is controlling. This property is not yet implemented in Chrome.isReload
: ABoolean
that signifies whether the page was reloaded or not when the event was dispatched.true
if yes, andfalse
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 tofalse
.
Specifications
Specification | Status | Comment |
---|---|---|
Service Workers The definition of 'FetchEvent' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 49.0 | 44.0 (44.0)[1] | No support | 24 | No support |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|
Basic support | No support | 49.0 | 44.0 (44.0) | (Yes) | No support | ? | No support | 49.0 |
[1] Service workers (and Push) have been disabled in the Firefox 45 Extended Support Release (ESR.)