Re: [csswg-drafts] [css-text] Allow letter-spacing to have unitless values like line-height

Also, in the twitter thread Jen instigated, I suggested "per mille of em" and have this follow up from DB

> Anything that’s based on the em is fine. Permille, percent, and upm are three good examples, and are all convertable via math, although rounding is the biggest issue with conversion.
>
> Anything that’s based on something else, the “default” instance, or “regular”, or a % of that... Anything where the Relationship between that and the em is unknown, (such as wght, wdth or slnt) those are bad, and are not interchangeable via math. Knowing the relationship between the default and the em is the biggest issue. 


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Received on Tuesday, 6 November 2018 17:27:01 UTC