WindowClient
The WindowClient
interface of the ServiceWorker API represents the scope of a service worker client that is a document in a browsing context, controlled by an active worker. The service worker client independently selects and uses a service worker for its own loading and sub-resources.
Instance methods
WindowClient
inherits methods from its parent interface, Client
.
WindowClient.focus()
-
Gives user input focus to the current client.
-
Loads a specified URL into a controlled client page.
Instance 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"
, or"prerender"
.
Example
js
self.addEventListener("notificationclick", (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((clientList) => {
for (const client of clientList) {
if (client.url === "/" && "focus" in client) {
client.focus();
break;
}
}
if (clients.openWindow) return clients.openWindow("/");
})
);
});
Specifications
Specification |
---|
Service Workers # windowclient |
Browser compatibility
BCD tables only load in the browser