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. | Editor's Draft | Defined in a WindowOrWorkerGlobalScope partial in the newest spec. |
| Service Workers | Editor's Draft | Initial definition. |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 40.0 |
42 (42) 52 (52)[1] | No support | ? | No support |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 42.0 (42) 52.0 (52)[1] | (Yes) | (Yes) | (Yes) |
[1] caches now defined on WindowOrWorkerGlobalScope mixin.
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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