ServiceWorkerGlobalScope.oninstall - Web APIs 编辑

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

self.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:

self.oninstall = 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

BCD tables only load in the browser

See also

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