[Webkit-unassigned] [Bug 188050] [Web Animations] Implied keyframes should not account for prior animations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188050

Antoine Quint <graouts at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[Web Animations] Multiple   |[Web Animations] Implied
                   |elements with similar       |keyframes should not
                   |animations progress at      |account for prior
                   |different rates             |animations

--- Comment #3 from Antoine Quint <graouts at apple.com> ---
The crux of the problem is that when we have an implied keyframe, such as a missing "from" in the test case, we use the provided pre-blend target style for the current animation, but this style may be affected by prior animations blending before it.

In the case of CSS Animations, it's a little different, since we compute implied keyframes up-front at the time the animations are created. So if the value at creation time and the value at start time are the same, everything looks right, but if the value changes during the delay phase for instance, or even in-flight, then we're wrong too.

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