Re: [csswg-drafts] [css-values] ch units shouldn’t cause font downloads

`.notdef` is well-understood, well-defined, and common. (It's just glyphid 0 in every font, commonly rendered as the tofu)

I'd propose making the spec somewhat flexible here, as I can think of a few reasonable behaviors off the top of my head, and we probably shouldn't prescribe any until we can do more research:

1. Use the font's .notdef glyph's width
1. Use the primary font's average character width
1. Pick another character that is renderable somewhere in the fallback list, and is representative

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Received on Sunday, 23 September 2018 07:05:05 UTC