Works perfectly. As developer you also should add extra controls for your webApp

First set HTTPS certification on your server. Then install and config Super PWA. Works perfectly, offline mode works fine, caching works fine. Super PWA gets new files when modified so you can see on the WebApp aplication of your device the lastest versions.

Very nice indeed!

You can use javascript to improve your results, for example:
<script>
if (navigator.onLine) {
console.log(‘online’);
} else {
console.log(‘offline’);
}
</script>