This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The focused
read-only property of the WindowClient
interface is a Boolean
that indicates whether the current client has focus.
Syntax
myFocused = WindowClient.focused;
Value
A Boolean
.
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) { if(!client.focused) return client.focus(); } } } if (clients.openWindow) return clients.openWindow('/'); })); });
Specifications
Specification | Status | Comment |
---|---|---|
Service Workers The definition of 'WindowClient' in that specification. |
Editor's 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 |
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 | 42.0 |
[1] Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)