ServiceWorkerGlobalScope.oninstall

The oninstall property of the ServiceWorkerGlobalScope interface is an event handler fired whenever an install event occurs (when the service worker installs). This happens before activation.

Syntax

ServiceWorkerGlobalScope.oninstall = function(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.add(
        '/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'
     );
   })
   );
});

Specifications

Browser compatibility

See also

• Using Service Workers
• Service workers basic code example
• Is ServiceWorker ready?
• Promise
• Using web workers