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What an amazing article. Thanks for sharing. I've been wondering for some time now whether CSS should have a formal semantics to help implementations, and for

What an amazing article. Thanks for sharing. I've been wondering for some time now whether CSS should have a formal semantics to help implementations, and for posteriority (eg. not leaving behind a mess of specs making it infeasible to implement browsers from scratch/specs for generations to come). For an example of what I'm after, see [1], which is using attribute grammars/logic grammars for a small fragment of CSS box layout, and is one of the precious few attempts of a formal semantics for CSS. [1]: https://lmeyerov.github.io/projects/pbrowser/pubfiles/extended.pdf https://lmeyerov.github.io/projects/pbrowser/pubfiles/extend...

thinkMOAR 9y ago
The above, plus i did not know about 'rem'. And now i do, thanks for that.
- Manishearth 9y ago
  There are a bunch more interesting ones that folks often haven't heard of, like ex (relative to the height of an x) or ch (relative to the width of a 0) https://developer.mozilla.org/en-US/docs/Web/CSS/length https://developer.mozilla.org/en-US/docs/Web/CSS/length (not all of the ones in that page are implemented by browsers, e.g. I don't think anyone implements `cap` or `ic` since it's from a draft spec)