ServiceWorkerRegistration: updatefound event

Secure context Available in workers

The updatefound event of the ServiceWorkerRegistration interface is fired any time the installing property acquires a new service worker.

Syntax

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

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

onupdatefound = (event) => { }

Event type

A generic Event.

Examples

const registration = await navigator.serviceWorker.getRegistration();
if (registration) {
  registration.addEventListener("updatefound", () => {
    console.log("Service Worker update found!");
  });
}

Specifications

Browser compatibility

See also

• Using Service Workers