The install event of the ServiceWorkerGlobalScope interface is fired when a ServiceWorkerRegistration acquires a new ServiceWorkerRegistration.installing worker.
This event is not cancelable and does not bubble.
ServiceWorkerGlobalScope: install event
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener('install', event => { }); oninstall = event => { };
Event type
An ExtendableEvent. Inherits from Event.
Event properties
Doesn't implement any specific properties, but inherits properties from its parent, Event.
Examples
The following snippet shows how an install event handler can be used to populate a cache with a number of responses, which the service worker can then use to serve assets offline:
this.addEventListener('install', function(event) { event.waitUntil( caches.open('v1').then(function(cache) { return cache.addAll([ '/sw-test/', '/sw-test/index.html', '/sw-test/style.css', '/sw-test/app.js', '/sw-test/image-list.js', '/sw-test/star-wars-logo.jpg', '/sw-test/gallery/', '/sw-test/gallery/bountyHunters.jpg', '/sw-test/gallery/myLittleVader.jpg', '/sw-test/gallery/snowTroopers.jpg' ]) }) ); });
You can also set up the event handler using the oninstall property:
globalScope.oninstall = function(event) { ... };
Specifications
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
install_event |
40
|
17
|
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
|
No
|
24
|
11.1
|
40
|
40
|
44
|
24
|
11.3
|
4.0
|
See also
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/install_event
