How to make an up and down button?

Question

React

Tell me how to make a button up and back to the same place where I flipped through the list!
Live example of VKontakte in the feed

Answer 1

on the "up" button you save window.pageYOffset
and then on the "down" button you do

window.scrollTo({
  top: pageYOffset,   // сохраненное
  left: 0,
  behavior: 'smooth'
});

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