public/serviceWorkerRegister.js

if ('serviceWorker' in navigator) {
 window.addEventListener('load', function () {
 navigator.serviceWorker.register('/serviceWorker.js').then(function (registration) {
 console.log('ServiceWorker registration successful with scope: ', registration.scope);
 }, function (err) {
 console.error('ServiceWorker registration failed: ', err);
 });
 });
}