[css-inline-3] vertical-align: super and font metrics (original) (raw)

We currently encourage UAs to use the parent font's metrics when positioning a superscript or subscript using vertical-align, but it doesn't seem like browser implementations, at least, do that. And I'm guessing making such a change would have noticeable Web-compat implications.

Should we introduce additional keywords, like font-super / font-sub or an additional use-font keyword to allow for using font metrics?