caches

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

The global caches read-only property 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
Service Workers 1 # self-caches

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
`caches`	40	16	42	No	27	11.1	40	40	42	27	11.3	4.0
`worker_support`	40	16	42	No	27	11.1	40	40	42	27	11.3	4.0