Is it possible to fix a block before the scrolling of the elements in it is finished?

Question

css

Suppose there are 2 blocks on the site.
The first takes up the entire height of the screen. But it contains information that "does not fit" and therefore you need to fix this block until all the information is scrolled.
In what way can this be done?

Answer 1

Through css, set the parent block to
overflow: hidden;
overflow-y: scroll;