[csswg-drafts] [web-animations-1] getKeyframes() processing steps need updating after null composite

graouts has just created a new issue for https://github.com/w3c/csswg-drafts:

== [web-animations-1] getKeyframes() processing steps need updating after null composite ==
In KeyframeEffectReadOnly::getKeyframes(), we now say that `composite` should always be set with a default of `null` in the non-normative section:

> **composite**
> The keyframe-specific composite operation used to combine the values specified in this keyframe with the underlying value.
> 
> This member will be null if the composite operation specified on the keyframe effect is being used.

However, in the (normative) processing steps below, we say:

> 2. Set offset, computedOffset, easing members of output keyframe to the respective values keyframe offset, computed keyframe offset, and keyframe-specific timing function of keyframe.
>
> 3. If keyframe has a keyframe-specific composite operation, set composite to that value.

I believe we should get rid of 3. and update 2. to read:

> 2. Set offset, computedOffset, easing, composite members of output keyframe to the respective values keyframe offset, computed keyframe offset, keyframe-specific timing function and keyframe-specific composite operation of keyframe.


Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/2289 using your GitHub account