How to make a stop at the beginning of the block when scrolling?

Question

css

I recently saw an article on Habré that talked about this, but I could not find it again.
The bottom line is this: there is a page consisting of blocks and when scrolling, the beginning of the block should be fixed at the top of the screen (as here: https://www.amazeelabs.com/). And is it possible to do this without using JavaScript?

Answer 1

Easily