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[css-fonts-5] font property uses it's own concept for reset-only sub-properties #11904
Description
The definition for font lists properties that are "reset implicitly" rather than using the "Reset-only sub-property" concept from Cascade-5. I assume it was written first? It would be nice to unify those.
Specifically I recently was going to implement font's concept of it generically but couldn't find it used anywhere else. Turns out it is used elsewhere, it just has a different name. 😅
Activity
svgeesus commentedon Mar 11, 2025
Yes these categories were introduced first, to clarify a specific bug in setting font shorthand properties:
font-palettebe reset by thefontshorthand? #7832in accordance with this CSSWG resolution
I agree that harmonization would be good, but Cascade 5 does not seem to cover all the categories (Cascaded Independently is missing) so this needs further discussion and coordination.
@fantasai @mirisuzanne @tabatkins
mirisuzanne commentedon Mar 12, 2025
My understanding is that properties which cascade independently are not sub-properties, so I'm not sure what it does to define the type of sub-property that behaves as not a sub-property? Is the goal to call out that some props named
foo-*are actually longhand sub-properties offoo, while some are independent but still part of the largerfoofeature? I don't think I've seen that called out before.svgeesus commentedon Mar 12, 2025
Put like that, it seems obvious. The problem was that some implementations were treating properties called
font-fooas if they were sub-properties, and so resetting them to initial values when thefontshorthand were set. We needed to clarify which were not sub-properties.I'm fine to add that clarification to Fonts 4, and to link to the Cascade 5 definition for
reset-only sub-property.[css-fonts-4] Refered to Cascade 5 for reset-only sub-property, rathe…
AtkinsSJ commentedon Mar 13, 2025
Perfect, thank you!