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WindowOrWorkerGlobalScope.caches

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The caches read-only property of the WindowOrWorkerGlobalScope interface returns the CacheStorage object associated with the current context. This object enables functionality such as storing assets for offline use, and generating custom responses to requests.

Syntax

var myCacheStorage = self.caches; // or just caches

Value

A CacheStorage object.

Example

the following example shows how you'd use a cache in a service worker context to store 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'
      ]);
    })
  );
});

Specifications

Specification Status Comment
Service Workers
The definition of 'caches' in that specification.
Working Draft Defined in a WindowOrWorkerGlobalScope partial in the newest spec.
Service Workers Working Draft Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 40 ? 42
42
52
caches now defined on WindowOrWorkerGlobalScope mixin.
No ? No
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support Yes Yes ? 42
42
52
caches now defined on WindowOrWorkerGlobalScope mixin.
Yes Yes ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/caches