How can I do this?

I recently stumbled upon a website în my country which has a nice feature for portfolio. Can you guys please let me know how can I do that effect on portfoio sites?
https://www.baboon.ro/proiecte-realizate/
Basically i'm interested in that "scroll feature" when you hover over with your mouse over every sites that they made.

Here you go
https://divinotes.com/create-image-scrolls-hover/