How to trigger a horizontal scroll?

Question

css

Hello, there is a construction like

https://codepen.io/true404/pen/PoPQbNm

I need to show a LEFT scroll so that the menu specifically goes beyond the edges of the browser and a LEFT scroll appears, I didn’t google the solution - no one did such nonsense on purpose

Answer 1

The coordinate system is measured from the top left point of the viewport. From here grow all such features.
It works in the same way in operating systems, by the way, move the mouse to the upper left part of the screen, you won’t be able to display it, but you can already go beyond the right and bottom.
In combination with JS , something like this can get in the way.