Device (Screen Size) detection in HTML?

Question

If I were to create a website, and I want a slightly different UI for mobile than on PC, how could I do that? Is it possible in CSS and/or HTML?

Answer 1

Yup, it is possible. Media queries will help u.
https://www.w3schools.com/css/css_rwd_mediaqueries.asp

Answer 2

The simplest way to make a website « responsive » is to use a framework like bootstrap , the more populary ( you have a bootstrap course on sololearn )
but it’s better to control css with mediaqueries before use it