How to make a fixed sidar with scrolling?

Question

JavaScript

Tell me a fixed sidebar script, which, if the sidebar is larger than the screen, fixes it only when it is scrolled all over, like how it is implemented here - https://1ps.ru/blog/sites/vyibiraem-cms-dlya-inter...

Only it hurts to jump there

upd: again: the sidebar is larger than the screen, the user scrolls down, the sidebar is fixed when the bottom of the screen is scrolled to the bottom of the sidebar, after that, if the user scrolls up, the sidebar remains in place and is fixed when you scroll to its upper border .

upd: an ideal example of the left sidebar in VK - https://habrastorage.org/webt/5b/47/30/5b4730f95f...

Answer 1

This plugin seems to work: leafo.net/sticky-kit