Hello,

We had an issue filed on Open UI about enforcing accessible scrollbars. While we have requested the site from the person that filed it; it does indicate a potentially lax spec text.

In the telecon today regarding this topic (if Open UI was the right venue for such a discussion) we denoted that the spec text could have more text around increased hit-targets or even possibly over-riding the min/max regions to match a "usable" behavior. Likewise I recommend that the following change be made:

The scrollbar should nonetheless remain wide enough to be usable.

change to:

The scrollbar MUST be wide enough to be usable when a user begins to interact with it.

As noted we can add in more insights and even potentially recommended dimensions based on studies that I'm sure companies within this group have done to inform the design guidelines for their scrollers.