[Webkit-unassigned] [Bug 269858] [web-animations] composed keyframe animation behaves differently in Webkit than Firefox and Chrome

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=269858

--- Comment #6 from Antoine Quint <graouts at webkit.org> ---
The problem is that when we encounter animations with implicit keyframes, we resolve those using the underlying style. In this case, this is the wrong approach because the underlying style should be used for the first of the two transform animations only, and the second animation ought to use the output of the first animation to use as the underlying value.

We may have to opt out of accelerating animations in this situation, at least with the existing codepath. Thankfully, the threaded animation resolution codepath handles this correctly.

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