2030129 - keyframes inheriting from a reset property not animating correctly

Status: NEW

(Core :: CSS Transitions and Animations, defect, P3)

Description

[Emilio Cobos Álvarez [:emilio]]

That's because we don't keep the inherit around from keyframe computation / uncomputation, causing us not to set the INHERITS_RESET_STYLE flag properly.

Causes WPT failures like https://searchfox.org/firefox-main/rev/187dc6baf299450446944dc90ba2239913004ba8/testing/web-platform/meta/web-animations/responsive/box-shadow-responsive.html.ini#2.

Bug 1533327 is tangentially related (we don't keep the wide keyword around for long enough).

I found this in bug 2029949 where I tried to optimize non-inherited custom property changes the same way as non-inherited non-custom property changes are already optimized today.

For now I'm keeping the unoptimized codepath for custom properties, but it'd be good to fix this properly...