Set scrolling element to something other than the window

Hello everyone!
Is there a way to change what the scrolling container is from the default (window)?

The main use case I see is a website where the view is wrapped in a scrolling div (and so, the window/document isn't scrolling).
In my case, I'm doing this to have a css `perspective` on the scrolling div but still being able to have a `position: fixed;` background below.