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
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 40 | Yes | 441 | No | 27 | No |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | 40 | 40 | ? | 44 | 27 | No | 4.0 |
1. Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)