Are there ready-made solutions for automated interface adaptation?

Question

Layout

I'm interested in the possibility of adapting the site by pressing one key.

Answer 1

Use frames

Answer 2

If you want it to adapt exactly by pressing a key, then add an event in JavaScript :)
Responsive layout cannot be done at the click of a finger, you need to correctly type it. How to make the layout "rubber" read on the Internet, there are a lot of articles, it's not difficult to find.