[web-animations-1] Should a property be not animatable by default? #8428
Description
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I created a few PRs to add Animation Type to property definitions that were missing this field, because Web Animations 1 says:
Unless otherwise specified, all CSS properties are animatable.
There might be some reason for this choice but if not, I think it would be easier to define properties as not animatable unless otherwise specified, eg. when they are not defined with Animation Type.