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: TheRequestobject that would have triggered the event handler.clientId: TheClientthat the current service worker is controlling. This property is not yet implemented in Chrome.isReload: ABooleanthat signifies whether the page was reloaded or not when the event was dispatched.trueif yes, andfalseif 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
We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
| 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 and 52 Extended Support Releases (ESR.)