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[css-animation-2] Setting animation.effect.composite should override any further change to animation-composition #6975

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[css-animation-2] Setting animation.effect.composite should override any further change to animation-composition #6975

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5 changes: 5 additions & 0 deletions css-animations-2/Overview.bs
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Expand Up @@ -144,6 +144,11 @@ the changes from the programming interface take precedence as follows:
However, if the last matching ''@keyframes'' rule is removed
the animation must still be canceled.

* After successfully setting the {{KeyframeEffect/composite}} of the
{{Animation/effect}} of a {{CSSAnimation}} to some {{CompositeOperation}}
other than the original {{CompositeOperation}}, any subsequent change to
'animation-composition' will not be reflected in that {{KeyframeEffect}}.

Note, the reference to a successful call in the above rules
is necessary to ensure that
when an exception is thrown by any of these methods,
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