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[css-contain-3] Make content-visibility animatable. - #8737

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flackr merged 2 commits into
w3c:mainfrom
flackr:content-visibility-animation
Apr 20, 2023
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[css-contain-3] Make content-visibility animatable.#8737
flackr merged 2 commits into
w3c:mainfrom
flackr:content-visibility-animation

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@flackr flackr commented Apr 19, 2023

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Allow animating content-visibility as animation type discrete with special interpolation to avoid hidden values similar to visibility. Fixes #8627

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[css-contain-3] Make content-visibility animatable.
2112e92 
Allow animating content-visibility as animation type discrete with
special interpolation to avoid hidden values similar to visibility.
Fixes w3c#8627
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flackr requested a review from mirisuzanne April 19, 2023 15:00
@mirisuzanne

mirisuzanne commented Apr 19, 2023

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This generally makes sense to me. The linked resolution had a third aspect, and it's not clear to me if it needs to be captured here:

Follow the same pattern as display for ensuring that css animations cannot deactivate themselves. Currently following that pattern would mean treating auto and hidden as revert.

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flackr commented Apr 20, 2023

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We're shifting away from that requirement for display as fewer special cases is simpler. See #6429 (comment)

Also I realized after making the recommendation for content-visibility that the same logic does not apply. content-visibility affects the visibility of its content, but the element itself remains visible (runs animations) even if set to hidden.

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mirisuzanne commented Apr 20, 2023

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Want to add a line in the changelog about this?

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flackr commented Apr 20, 2023

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Want to add a line in the changelog about this?

Thanks for the reminder, done.

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flackr merged commit 64fa7b9 into w3c:main Apr 20, 2023
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[css-contain-4] Make content-visibility animatable

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