ServiceWorkerContainer: controllerchange event

Secure contextAvailable in 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) => { }

Event type

A generic Event.

Example

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

Specifications

Browser compatibility