Scrollbar getting focus when not visible about textual HOT 2 OPEN

Hey @chrisstjohn, thanks for your issue.

When I run dictionary.py and I TAB around, I can focus the vertical scroll and I get a blue border showing me where the focus is.
Don't you get a similar visual indication in your app?
If you don't, you can use TCSS and the :focus pseudoclass to add a visual indication when your focus is in another widget.

To me, it makes sense that the VerticalScroll in dictionary.py is focusable even when there's nothing to scroll.
I feel it's similar to how you're able to focus a button with TAB, regardless of whether clicking that button does something or not.

Now, what I'm focusing is a VerticalScroll and not a Markdown widget, so maybe there's some confusion in your case and focus is actually going somewhere else (you also can't see?).
Maybe share an MRE of your app/context.

from textual.

@chrisstjohn IDK if this will help you in any way, but I'll leave a link to #3717

from textual.