We're looking for a person or people to help audit MDN to find places we could speed up. Is this you or someone you know? Check out the RFP: https://mzl.la/2IHcMiE


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

The matchAll() method of the Clients interface returns a Promise for a list of service worker Client objects. Include the options parameter to return all service worker clients whose origin is the same as the associated service worker's origin. If options are not included, the method returns only the service worker clients controlled by the service worker.


ServiceWorkerClients.matchAll(options).then(function(clients) {
  // do something with your clients list


options Optional
An options object allowing you to set options for the matching operation. Available options are:
  • includeUncontrolled: A Boolean — if set to true, the matching operation will return all service worker clients who share the same origin as the current service worker. Otherwise, it returns only the service worker clients controlled by the current service worker. The default is false.
  • type: Sets the type of clients you want matched. Available values are window, worker, sharedworker, and all. The default is all.

Return value

Promise that resolves to an array of Client objects. In Chrome 46/Firefox 54 and later, this method returns clients in most recently focused order, correct as per spec.


clients.matchAll(options).then(function(clientList) {
  for (var i = 0 ; i < clients.length ; i++) {
    if (clientList[i].url === 'index.html') {
      // or do something else involving the matching client


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support471 ?



No32 No
includeUncontrolled option471 ?453 No38 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support471471 ?



32 No4.0
includeUncontrolled option471471 ?45338 No ?

1. Client objects returned in most recent focus order.

2. Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).

3. includeUncontrolled support.

Document Tags and Contributors

 Last updated by: fscholz,