So I am working on a little project, my first pwa or coding project in general.
Right now i need to implement real time notifications for admin users based on a property of the backend channging from “true” to “false” — better said if any “user.melden” gets set to true, a logged in admin should receive a notifiaction in real time.

So I just implemented service workers in my application and I tried to implement the mentioned functionality by following this guide. I have gotten the permission pop-up to work, but am kinda stuck on how i can implement the notification feature i mentioned.
Any guidance is much appreciated!