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

The WindowClient interface of the ServiceWorker API represents the scope of a service worker client that is a document in a browser context, controlled by an active worker. The service worker client independently selects and uses a service worker for its own loading and sub-resources.

Methods

WindowClient inherits methods from its parent interface, Client.

WindowClient.focus()
Gives user input focus to the current client. 
WindowClient.navigate()
Loads a specified URL into a controlled client page.

Properties

WindowClient inherits properties from its parent interface, Client.

WindowClient.focused Read only
A boolean that indicates whether the current client has focus.
WindowClient.visibilityState Read only
Indicates the visibility of the current client. This value can be one of hidden, visible, prerender, or unloaded.

Example

self.addEventListener('notificationclick', function(event) {
  console.log('On notification click: ', event.notification.tag);
  event.notification.close();

  // This looks to see if the current is already open and
  // focuses if it is
  event.waitUntil(clients.matchAll({
    type: "window"
  }).then(function(clientList) {
    for (var i = 0; i < clientList.length; i++) {
      var client = clientList[i];
      if (client.url == '/' && 'focus' in client) {
        client.focus();
        break;
      }
    }
    if (clients.openWindow)
      return clients.openWindow('/');
  }));
});

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome Full support 42Edge Full support YesFirefox Full support 44
Notes
Full support 44
Notes
Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).
IE No support NoOpera ? Safari No support NoWebView Android No support NoChrome Android Full support 42Edge Mobile ? Firefox Android Full support 44Opera Android ? Safari iOS No support NoSamsung Internet Android Full support 4.0
focus
Experimental
Chrome Full support 42Edge Full support YesFirefox Full support 44
Notes
Full support 44
Notes
Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).
IE No support NoOpera ? Safari No support NoWebView Android No support NoChrome Android Full support 42Edge Mobile ? Firefox Android Full support 44Opera Android ? Safari iOS No support NoSamsung Internet Android Full support 4.0
navigate
Experimental
Chrome Full support 49Edge Full support YesFirefox Full support 44
Notes
Full support 44
Notes
Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).
IE No support NoOpera ? Safari No support NoWebView Android No support NoChrome Android Full support 49Edge Mobile ? Firefox Android Full support 44Opera Android ? Safari iOS No support NoSamsung Internet Android Full support 4.0
focused
Experimental
Chrome Full support 42Edge Full support YesFirefox Full support 44
Notes
Full support 44
Notes
Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).
IE No support NoOpera ? Safari No support NoWebView Android No support NoChrome Android Full support 42Edge Mobile ? Firefox Android Full support 44Opera Android ? Safari iOS No support NoSamsung Internet Android Full support 4.0
visibilityState
Experimental
Chrome Full support 42Edge Full support YesFirefox Full support 44
Notes
Full support 44
Notes
Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).
IE No support NoOpera ? Safari No support NoWebView Android No support NoChrome Android Full support 42Edge Mobile ? Firefox Android Full support 44Opera Android ? Safari iOS No support NoSamsung Internet Android Full support 4.0
ancestorOriginsChrome ? Edge ? Firefox ? IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

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

See also

Document Tags and Contributors

Last updated by: fscholz,