Sending steam information to dhtml

Pretty much just what was said in the title, I am wondering if there is any way to log a player into a website inside a DHTML with their current steam login on the server. I am not finding anything online and can’t think of any ways to do it. I am assuming that there is no way to do it since I have never seen it before, but I figured I would ask.

Attempting to simulate a “login through steam” on my donation page, but I could see how this could lead to security issues which is why I am assuming it’s not possible.

Seems like I can use the built in steam browser and that won’t require steam guard passcodes, bout all I need. Nothing else seems possible.