> This textbox trim seems like a fix for badly made fonts
That's not what it is. It's a typographic control that wasn't available in browsers before. It's got nothing to do with fonts being badly made. All textboxes (no matter which font) can be measured from many different places, and this lets you specify (via text-box-edge) which of those many different places you want to consider as the bounds of a specific textbox.
That's not what it is. It's a typographic control that wasn't available in browsers before. It's got nothing to do with fonts being badly made. All textboxes (no matter which font) can be measured from many different places, and this lets you specify (via text-box-edge) which of those many different places you want to consider as the bounds of a specific textbox.