Is there a way to add badge notifications using progressive web apps (PWA)?

I'm developing a progressive web application (PWA) that will eventually send notifications to users.

I already know that I'm able to send push notifications (like in any regular app), as explained in the following blog post: http://ift.tt/2vPQJj3.

I also know that I can add a PWA to the home screen, by creating a simple manifest file (http://ift.tt/1N7Lu3N).

However, after having the app in home screen, I would like to add a "hint" to user, letting him know that he has to access the application. A great way to do that is doing something like a "badge notification" (as showed in Facebook icon on the image below).

Is it possible to add this kind of behavior using progressive web applications?