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


request Optional
The Request want to return, if a specific key is desired. This can be a Request object or a URL.
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 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().

Return value

A Promise that resolves to an array of Cache keys.

Examples'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 compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome Full support 43Edge Full support 16Firefox Full support 39
Full support 39
Notes Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
IE No support NoOpera Full support 30Safari Full support 11WebView Android Full support 43Chrome Android Full support 43Firefox Android Full support 39Opera Android Full support 30Safari iOS Full support 11Samsung Internet Android Full support 4.0


Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.

See also