RESOLVED WONTFIX Bug 279732
[scroll-animations] add `animation-timeline` to the `animation` shorthand 
https://bugs.webkit.org/show_bug.cgi?id=279732
Summary [scroll-animations] add `animation-timeline` to the `animation` shorthand
Antoine Quint
Reported 2024-09-15 03:41:15 PDT
The `animation-timeline` property is part of the `animation` shorthand. See https://github.com/web-platform-tests/wpt/issues/43500 for further discussion.
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Radar WebKit Bug Importer
Comment 1 2024-09-15 03:41:55 PDT
<rdar://problem/136031404>
Bramus
Comment 2 2024-09-15 06:44:56 PDT
Is this correct? IIRC we resolved on `animation-timeline` being a reset-only sub-property of the `animation` shorthand. There was a resolution on allowing `animation-timeline` in the shorthand under certain conditions (see https://github.com/w3c/csswg-drafts/issues/6946#issuecomment-1646065211) but AFAIK this has not been detailed nor specced yet.
Antoine Quint
Comment 3 2024-09-15 11:10:09 PDT
I see! The spec still lists `<single-animation-timeline>` in the animation shorthand https://drafts.csswg.org/css-animations-2/#animation-shorthand. I'm not sure when the new syntax is expected to be specified, but the spec should get updated to remove `<single-animation-timeline>` entirely for the time being.
Bramus
Comment 4 2024-09-15 11:15:16 PDT
Agree on removing `<single-animation-timeline>` entirely for the time being. Best to double check with flackr and/or fantasai.
Antoine Quint
Comment 5 2024-09-24 02:48:53 PDT
Talked with fantasai and it doesn't look like the spec is ready for us to implement animation-timeline as part of the shorthand. We'll close this for now. Thanks for bringing this up Bramus.
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