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.
var myCacheStorage = self.caches; // or just caches
A CacheStorage
object.
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' ]); }) ); });
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. |
Desktop | ||||||
---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
Basic support | 40 | ? | 42
|
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
|
Yes | Yes | ? |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/caches