I assumed you knew how to use tab-bar :) I rarely use emojis but this one I couldn't help myself.

It also works with mouse-face on any spans of glyphs embedded in the name string.

On Thu, Feb 27, 2025 at 1:42 PM Juri Linkov <juri@linkov.net> wrote:

> (defun my/tab-bar-tab-name-format-function (tab i)
> (propertize
> (tab-bar-tab-name-format-default tab i)
> 'mouse-face '(:inverse-video t))) ; or a named face
> (setopt tab-bar-tab-name-format-function
> #'my/tab-bar-tab-name-format-function)
>
> And move the mouse over the tab. It should invert. It does for me.

Thanks, now it works. The requirement is that the tab-bar-mode
should be disabled before evaluating the above code. Otherwise,
with already enabled tab-bar-mode it has no effect.