There is no test suite (at least I'm not aware of it) beside what we have and what I will add to cover to align with the spec. http://dev.w3.org/csswg/css-animations/ also say : "No test suite". It's sad.
I'm supportive of this unprefixing. Do we have a test suite to make sure that our unprefixed versions conform to it? It took us a long time to get our <canvas> implementation to match the Canvas spec. I suspect the same may be true for our animations during the process of unprefixing them.
Support of unprefixed CSS properties for CSS Animations
It's pretty obvious but today Blink doesn't support setting unprefixed CSS properties for the animations module. You'll have to use the -webkit-* properties to make your animations work. Supporting the unprefixed counterpart will help the web towards a better place and avoid using proprietary names. With WebKit, Blink is the only major vendor not supporting it.
I believe that the implementation is pretty close to the spec but we need to investigate if parsing and behaviour is aligned. If we intent to change behaviour of the proprietary counterpart (in the name of sharing the code with the unprefixed part) then we potentially could break some sites around. Again based on my experience unprefixing the CSS Transitions (where I changed the behaviour to align with the spec in few cases) it doesn't seem to be an issue. It's a case by case basis that we can discuss on a given patch if the problem arise.
Ongoing technical constraints
It may sounds super easy to do like just aliasing the CSS properties in CSSPropertyNames.in but based on the experience of CSS Transitions (where the original implementation aliased the properties) it is slightly more tricky : property counts in the declared style, prefixed/unprefixed DOM events... Luckily these problems are resolved with the work on CSS Transitions so I expect the implementation to be faster. For the record unprefixed CSS Transitions are shipping since Chrome 26.
Will this feature be supported on all five Blink platforms (Windows, Mac, Linux, Chrome OS and Android)?
No. The feature is already in the engine. Should I add a row (and probably one for the CSS Transitions then)?
Requesting approval to ship?
No. I'd like to develop the change in the comfort zone like we did with the transitions properties and let the people experience it with the experimental features. When it's done then I will send an intent to ship.
-- Alexis Menard
Software Engineer @ Intel Open Source Technology Center
-- Alexis Menard Software Engineer @ Intel Open Source Technology Center
Intel Semiconductores do Brasil Ltda. Ave Dr. Chucri Zaidan, 940, Brooklin, 10 Andar
04583-904 São Paulo, SP Brazil
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