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 insecure contexts (HTTPS), in some or allsupporting browsers.

Note: This feature is only available inWeb Workers.

Thecaches read-only property of theWorkerGlobalScope interface returns theCacheStorage object associated with the current context.This object enables functionality such as storing assets for offline use, and generating custom responses to requests.

Value

ACacheStorage object.

Examples

The following example shows how you'd use a cache in aservice worker context to store assets offline.

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",        ]),      ),  );});