When they reach the bottom, the overflow container stops scrolling because there's no more content to consume. As an example, take an app drawer with a large number of items that the user may have to scroll through.
Scrolling is one of the most fundamental ways to interact with a page, but certain UX patterns can be tricky to deal with because of the browser's quirky default behaviors. # Background # Scroll boundaries and scroll chaining Scroll chaining on Chrome Android.
It's in development or being considered by other browsers.