Re: [csswg-drafts] [css-syntax-3] Restrict validity of substitution values and math functions (#8717)

  > All of the "substitution values" are invalid by virtue of only being defined in the context of a property on an element.

It is clear to me. I was thinking of the author who would like to understand why they are invalid outside of this context. But ok.

  > Math functions are resolveable anywhere

Actually, I was more interested in this clarification. So they can be a valid [keyframe selector](https://drafts.csswg.org/css-animations-1/#typedef-keyframe-selector)? (If so, this issue can be closed.) Or should a keyframe selector be defined with `<percentage-token>`?

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Received on Saturday, 15 April 2023 11:42:43 UTC