files/en-us/web/api/windowclient/focused/index.md
{{APIRef("Service Workers API")}}{{AvailableInWorkers("service")}}
The focused read-only property of the
{{domxref("WindowClient")}} interface is a boolean value that indicates whether
the current client has focus.
A boolean value.
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) {
if (!client.focused) return client.focus();
}
}
if (clients.openWindow) return clients.openWindow("/");
}),
);
});
{{Specifications}}
{{Compat}}