hide inaktive menu points when scrolling down webpage

[joseke]

hi there, thank you for your amazing work! really enjoy designing my webpage with laytheme!

so for now, I would like to know the best practice for hiding the inaktive menu points in my menu at the top of the page when scrolling down the website. so that only the menubar with aktive menu points is displayed.

like in this example :
https://alexandraschuessler.com/two-dimensional-work

since I'm just a beginner, I just only have really basic clues in custom design with css.

is there somebody, who could explain how I manage to do that in a understandable way?

thank you soooo much!!! really appreciate it!

my website:https://plu-architektur.com

[arminunruh]

sry i dont have time to code this for u

basically u need to use javascript