The solution is to use a virtualised scrollbar as well, so you have a div whose only purpose is to show a scroll bar, and then when that scrolls you scale the s

The solution is to use a virtualised scrollbar as well, so you have a div whose only purpose is to show a scroll bar, and then when that scrolls you scale the scrollTop proportionally. E.g. dragging the scroll bar by 1 pixel might equate to moving the grid by 20 items, but this is fine because in grids of that size it's impossible to precisely scroll using a scroll bar anyway. Scrolling via the scroll wheel is unaffected so the user doesn't notice.