This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The Clients interface of the Service Workers API represents a container for a list of Client objects.


Gets a service worker client matching a given id and returns it in a Promise.
Gets a list of service worker clients and returns them in a Promise. 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. 
Opens a service worker Client in a new browser window.
Allows an active Service Worker to set itself as the active worker for a client page when the worker and the page are in the same scope. 


clients.matchAll(options).then(function(clients) {
  for(i = 0 ; i < clients.length ; i++) {
    if(clients[i] === '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

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 40.0 44.0 (44.0)[1] No support ? No support
Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support ? 44.0 (44.0) (Yes) No support ? No support ?

[1] Service workers (and Push) have been disabled in the Firefox 45 Extended Support Release (ESR.)

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, Sebastianz, jpmedley, fscholz, teoli, Meggin
 Last updated by: chrisdavidmills,