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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.

Client WindowClient

Instance 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.

Instance properties

WindowClient inherits properties from its parent interface, Client.

WindowClient.ancestorOrigins Read only

An array of strings that indicates the ancestor origins of the browsing context represented by this WindowClient in reverse order.

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

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
WindowClient 42 17 44 No 29 11.1 42 42 44 29 11.3 4.0
ancestorOrigins No No No No No 16 No No No No No No
focus 42 17 44 No 29 11.1 42 42 44 29 11.3 4.0
focused 42 17 44 No 29 11.1 42 42 44 29 11.3 4.0
navigate 49 17 50 No 36 16
11.1–16This method exists, but always throws NotSupportedError.
 42 49 50 36 16
11.3–16This method exists, but always throws NotSupportedError.
 4.0
visibilityState 42 17 44 No 29 11.1 42 42 44 29 11.3 4.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WindowClient