Re: [csswg-drafts] [css-animations-2][scroll-animations-1] Serialization of `animation-*` shorthands with longhand value lengths different than `animation-name` (#11659)

Actually, the tests on WPT do not make assertions against the serialization of the declared `animation` but of its sub-properties. Sorry.

`animation-timeline` is a sub-property of `animation` that is not reset-only so its declared value should have the same length than `animation-name` (when declared in `animation`). Its second list value *may be* omitted in the serialization of its declared/computed value because it is its initial value (shortest serialization principle). However, some of the other `animation-*` sub-properties that are not reset-only are also declared with their initial value as their second list value, which are not omitted in their serialization of their declared value on the WPT tests.

I think the serialization of the declared/computed value of `animation` should be able to represent all its longhands, even if the declared value of its reset-only sub-properties do not have the same length than `animation-name`. They only need to be declared to their initial value.

Similarly, I think the serialization of the declared/computed value of `animation-range` *may be* able to represent its longhands, even if their declared value do have not the same length than `animation-name`.

Finally, `animation-trigger-*` are [supposed](https://github.com/w3c/csswg-drafts/pull/11653#issuecomment-2644036921) to be reset-only.

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Received on Monday, 10 February 2025 07:10:22 UTC