ServiceWorkerContainer: controllerchange event

{{APIRef("Service Workers API")}}{{SecureContext_Header}}{{AvailableInWorkers}}

The controllerchange event of the {{domxref("ServiceWorkerContainer")}} interface fires when the document's associated {{domxref("ServiceWorkerRegistration")}} acquires a new {{domxref("ServiceWorkerRegistration.active","active")}} worker.

Syntax

Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.

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

oncontrollerchange = (event) => { }

Event type

A generic {{domxref("Event")}}.

Example

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

Specifications

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Browser compatibility

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