Re: [csswg-drafts] [css-animations] Clarify properties that are not allowed in @keyframes rule (#2736)

> I think we still need to clarify whether non-animatable properties are exposed in the CSSOM. Specifically, from an above comment:

If a keyframe rule does not *contain* / *accept* non-animatable properties, they should not be exposed in CSSOM (according to [CSS Syntax](https://drafts.csswg.org/css-syntax/#declaration-rule-list)) and this issue can be closed:

> For rules that use `<style-block>` or `<declaration-list>`, the spec for the rule must define which properties, descriptors, and/or at-rules are valid inside the rule; this may be as simple as saying "The `@foo` rule accepts the properties/descriptors defined in this specification/section.", [...]. **Any declarations or at-rules found inside the block that are not defined as valid must be removed from the rule’s value**.

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Received on Saturday, 2 July 2022 12:12:15 UTC