Scrollspy in Bootstrap 4

Hi there!

Can anyone explain in dummie talk how to make a scrollspy is Bootstrap 4?
Or is there a good manual on the web somewhere? Ik keep finding explanations but these are all for Bootstrap 3, which is very different.
It’s all i need to finish my portfolio and get in to the good stuff.
Thnks for you consideration!

@SkyC thnks man! This is just what I needed and the exact reason I love the FCC community, whenever your hopelessly lost, just ask and the community will hell!