[Idea] Header Flexible Fixed

[eveneme]

The header with the Flexible Fixed function, meaning that when scrolling down, it disappears after a while, and if you start scrolling back up, it reappears. It seems to me that this is a good option because when you scroll down, you have more screen space, and when scrolling back up, the header appears so you don't have to scroll all the way to the top. Example below from one side.

This function would be available on both mobile devices and computers.

Example: https://youtu.be/RYR13lBJhHA

[eveneme]

DEMO: https://www.woltlab.pl/