ServiceWorkerRegistration: updatefound event

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

Syntax

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

js

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

onupdatefound = (event) => {};

Event type

A generic Event.

Examples

js

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

Specifications

Specification
Service Workers
# dom-serviceworkerregistration-onupdatefound

Browser compatibility

BCD tables only load in the browser

See also