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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 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
, orunloaded
.
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) return client.focus(); } 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
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 42.0 | 44.0 (44.0)[1] | No support | ? | No support |
navigate() |
49.0 |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|
Basic support | No support | No support | 44.0 (44.0) | (Yes) | No support | ? | No support | 42.0 |
navigate() |
No support | No support | 49.0 |
[1] Service workers (and Push) have been disabled in the Firefox 45 Extended Support Release (ESR.)