Service Worker which is a javascript file that enables your PWA for offline. This feature is available in the major browsers that supports service worker.
PWA will show a custom offline page when there's no network (offline mode).
You can set default offline text message using our PWA Generator.
Optional: We provide a default offline html page which display a message that you are offline but you can customize it manually (using HTML, CSS, JS) based on requirement & creativity like display a contact information etc.