Progressive Web Apps (PWA) are a hybrid between web applications and mobile applications, in fact they are developed as web applications but with additional features, made available thanks to the use of Service Worker, a script that is located between the server and the browser.
In this repo I show how to familiarize yourself with the Service Worker to allow the web app to work even offline and to be installed on the Home screen of the device.
To scan the qr code I used instascan library.
You can try it here: QR Code Reader
⭐ If you liked what I did, if it was useful to you or if it served as a starting point for something more magical let me know with a star 💚