Progressive Web Apps with React

Listening for the page load

We don't want to register our service worker until the page has finished loading; there's no point, and it can lead to complications, so we'll add an event listener to the window for the 'load' event:

<script>  if ('serviceWorker' in navigator) {    window.addEventListener('load', function() {    });  } else {    console.log('service worker is not supported');  }</script>