WorkerGlobalScope: caches property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is only available in Web Workers.
The caches
read-only property of the WorkerGlobalScope
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.
Value
A CacheStorage
object.
Examples
The following example shows how you'd use a cache in a service worker context to store assets offline.
js
self.addEventListener("install", (event) => {
event.waitUntil(
self.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",
]),
),
);
});
Specifications
Specification |
---|
Service Workers # self-caches |
Browser compatibility
BCD tables only load in the browser