This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The keys() method of the Cache interface returns a Promise that resolves to an array of Cache keys.

The requests are returned in the same order that they were inserted.

Note: Requests with duplicate URLs but different headers can be returned if their responses have the VARY header set on them.


cache.keys(request,{options}).then(function(keys) {
  //do something with your array of requests


A Promise that resolves to an array of Cache keys.


request Optional
The Request want to return, if a specific key is desired.
options Optional
An object whose properties control how matching is done in the keys operation. The available options are:
  • ignoreSearch: A Boolean that specifies whether the matching process should ignore the query string in the url. If set to true, the ?value=bar part of http://foo.com/?value=bar would be ignored when performing a match. It defaults to false.
  • ignoreMethod: A Boolean that, when set to true, prevents matching operations from validating the Request HTTP method (normally only GET and HEAD are allowed.) It defaults to false.
  • ignoreVary: A Boolean that, when set to true, tells the matching operation not to perform VARY header matching. In other words, if the URL matches you will get a match regardless of whether the Response object has a VARY header. It defaults to false.
  • cacheName: A DOMString that represents a specific cache to search within. Note that this option is ignored by Cache.keys().


caches.open('v1').then(function(cache) {
  cache.keys().then(function(keys) {
    keys.forEach(function(request, index, array) {


Specification Status Comment
Service Workers
The definition of 'Cache: keys' in that specification.
Working Draft Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 43 16 39
Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).
No 30 No
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 43 43 No 39 30 No 4.0

See also

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