How to fix scrolling?

Question

css

There is a roller on Pug and SCSS https://codepen.io/disney1993/pen/BRBJMB
I tried to transfer it to HTML CSS https://codepen.io/stgreg13/pen/wVYXXB
but scrolling stopped working where I went wrong like this is it possible to fix it and is it possible at all?

Answer 1

You just didn't include libraries, in codepen - settings.
There 1 external css file and 4 external js
https://codepen.io/origami1024/pen/PMyaXY