[csswg-drafts] [scroll-animations] @scroll-timeline in shadow trees (#5167)

andruud has just created a new issue for https://github.com/w3c/csswg-drafts:

== [scroll-animations] @scroll-timeline in shadow trees ==
Should we temporarily spec that `@scroll-timeline` is ignored in shadow trees, and add a note that this will change in the future? (See similar text in css-properties-values-api).

There is currently ongoing work in the WG regarding how @-rules and "name-defining things + references" in general should work in shadow trees, and it's a quite complicated problem to solve.

It doesn't really make sense to attempt to solve this "locally" via the scroll-animations spec, and the feature will be held back for a long time (probably) if we choose to block on this.

cc @majido 

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/5167 using your GitHub account