Hidden scrollbars are just terrible UX all round for so many reasons: - Discoverability: You don't even know if a container is scrollable at all until you try.

Hidden scrollbars are just terrible UX all round for so many reasons: - Discoverability: You don't even know if a container is scrollable at all until you try. - Orientation: You don't know where you are in a document until you scroll to make the bar appear, and then you have to notice it before it disappears - Usability: It's much harder to target the scroll thumb to drag it. To find it you need to again scroll first, then notice it, then target it with the mouse, all under time pressure before it disappears. If you're on MacOS, do yourself (and your users) a favor and set them to always show.