CacheStorage.delete()

The delete() method of the CacheStorage interface finds the Cache object matching the cacheName, and if found, deletes the Cache object and returns a Promise that resolves to true. If no Cache object is found, it resolves to false.

You can access CacheStorage through the global caches property.

Syntax

caches.delete(cacheName).then(function(boolean) {
  // your cache is now deleted
});

Parameters

cacheName

The name of the cache you want to delete.

Return value

a Promise that resolves to true if the Cache object is found and deleted, and false otherwise.

Examples

In this code snippet we wait for an activate event, and then run a waitUntil() block that clears up any old, unused caches before a new service worker is activated. Here we have an array of cache names we want to keep (cachesToKeep). We return the keys of the caches in the CacheStorage object using CacheStorage.keys, then check each key to see if it is in the array. If not, we delete it using delete().

this.addEventListener('activate', function(event) {
  var cachesToKeep = ['v2'];

  event.waitUntil(
    caches.keys().then(function(keyList) {
      return Promise.all(keyList.map(function(key) {
        if (cachesToKeep.indexOf(key) === -1) {
          return caches.delete(key);
        }
      }));
    })
  );
});

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
delete
40
16
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
No
27
11.1
40
40
44
27
Yes
4.0

See also

© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/CacheStorage/delete