ServiceWorkerGlobalScope: install event - Web APIs 编辑

The install event of the ServiceWorkerGlobalScope interface is fired when a ServiceWorkerRegistration acquires a new ServiceWorkerRegistration.installing worker.

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 ServiceWorkerGlobalScope.oninstall property:

globalScope.oninstall = function(event) {
  ...
};

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• activate event
• ServiceWorkerGlobalScope
• Service Worker API