WindowClient.focus()
The focus()
method of the WindowClient
interface gives user input focus to the current client and returns a
Promise
that resolves to the existing
WindowClient
.
Syntax
windowClient.focus().then(function(windowClient) {
// do something with your WindowClient once it has been focused
});
Parameters
None.
Return value
A Promise
that resolves to the existing WindowClient
.
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 |
---|
Service Workers 1 # client-focus |
Browser compatibility
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