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.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
A CacheStorage object.
The following example shows how you'd use a cache in a service worker context to store assets offline.
js
this.addEventListener("install", (event) => {
event.waitUntil(
caches
.open("v1")
.then((cache) =>
cache.addAll([
"/",
"/index.html",
"/style.css",
"/app.js",
"/image-list.js",
"/star-wars-logo.jpg",
"/gallery/",
"/gallery/bountyHunters.jpg",
"/gallery/myLittleVader.jpg",
"/gallery/snowTroopers.jpg",
]),
),
);
});
| Specification |
|---|
| Service Workers # self-caches |
| 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 | 41 | No | 27 | 11.1 | 40 | 40 | 41 | 27 | 11.3 | 4.0 |
secure_context_required |
65 | 79 | 103 | No | 52 | 11.1 | 65 | 65 | 103 | 47 | 11.3 | 9.0 |
worker_support |
40 | 16 | 41 | No | 27 | 11.1 | 40 | 40 | 41 | 27 | 11.3 | 4.0 |
© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/caches