The overscroll-behavior property in CSS controls whether an element will use “scroll chaining” or not. You have likely experienced this behavior before and perhaps took it for granted that scrolling works like this on the web! If you are inside of an element that has it’s own scrolling (say it’s vertical) and you have scrolled down to the bottom of it, then by default, the next parent element up (maybe the page itself) starts to scroll in that direction. If … Read article “overscroll-behavior”