If an element has overflow: auto or overflow: scroll, and its contents overflow, then scrollbars are shown… but only if the content overflows to the right or off the bottom.
Is it possible for the overflow to apply scrollbars if content is overflowing to the left, or off the top?
What you ask is somewhat contradictionary. If you want to show the whole content of a larger box inside a smaller box, you must have a scrollbar position for each side’s end. When you place content (with absolute position and/or negative margins) which overflows this “endpoint” in either direction, you essentially block yourself from using the scroll feature as it is intended to be. (this does not mean that I do not find it usefull sometimes 🙂