pwabuilder-sw-register.js

// This is the "Offline page" service worker

// Add this below content to your HTML page inside a <script type="module"></script> tag, or add the js file to your page at the very top to register service worker

import 'https://cdn.jsdelivr.net/npm/@pwabuilder/pwaupdate';

const el = document.createElement('pwa-update');
document.body.appendChild(el);