ServiceWorkerContainer: controllerchange event

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is available in Web Workers.

The controllerchange event of the ServiceWorkerContainer interface fires when the document's associated ServiceWorkerRegistration acquires a new active worker.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("controllerchange", (event) => { })

oncontrollerchange = (event) => { }

A generic Event.

navigator.serviceWorker.addEventListener("controllerchange", () => {
  console.log("The controller of current browsing context has changed.");
});