Animated scroll in pure js?

Question

JavaScript

Hello everyone, for 3 hours I can not do this:
I need to animate the page using scrollBy(0, height), to the height of the block. Animation I need ease-out 0.4s; I'm digging around with this and I can't figure out how to do it - https://learn.javascript.ru/js-animation

Answer 1

Here is an implementation example