How to make a mobile menu for a website?

Question

css

Hello. Tell me, where can I read information on how to make a dynamic menu for the site? Those. a person scrolls the page, and the menu stays at the top all the time. This is often used in all sorts of Landing Pages and other things.

Answer 1

https://www.youtube.com/watch?v=E04x2Q9sxSM

Answer 2

Everything is very simple
Go here Click
on any link and get something like the following

Answer 3

You register styles for the menu pisition:fixed; top:0;
Everything, the magic happened