This website that we are communicating on returns html from the server. That's how the web works

That's... no, servers sending HTML to the client was where we started with all this.

That's why the H in HTTP and in HTML stand for "Hypertext." Any time a webserver replies with something other than markup, _that's_ the extension/exception to that very old design.

Now, if you're talking about the separation of user-interface, data, logic, and where HTML fits in, that's a much bigger discussion.

partial html?

Returning html from a server is... just the WWW.

Oh I guess I missed the point. So everything is rendered on server and even templating is on server side. Fair.