WorkerGlobalScope: caches property

Baseline Widely available

This feature is well established and works across many devices and browser versions. Its been available across browsers since April 2018.

Learn more
See full compatibility

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.

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 Nightly # self-caches

Browser compatibility

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This page was last modified on Aug 29, 2024 by MDN contributors.

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