If you are wondering why you would want to dive in, let me offer another good reason: there is Datascript (https://github.com/tonsky/datascript), which puts a good subset of Datalog inside your client-side browser app.
I found it very useful for dealing with relational data in browser apps.
This seems like a really interesting page, unfortunately it's currently hard to consume on a smartphone: no mobile view and not possible to enable Reader Mode even on Firefox for Android :(
To be fair, a big part of this page is the interactive exercises, which would be a nightmare to try to do on mobile anyway. So I can see why being compatible with mobile wasn't a big concern.
That's right, and even more holds: Syntactically, Datalog is a proper subset of Prolog!