CSS 3 has some awesome new animation capabilities for web developers — rotating objects, fading them in and out and more — but writing the code is a bit more complicated than most CSS rules ...

In contrast to this, CSS Animations allow us to work with the DOM and can be composited onto the GPU, meaning we can achieve good performance with maintainable code.

Sencha says that "best of all, Sencha Animator outputs pure CSS3 animation code, so it's hardware accelerated on Apple iOS, which creates incredibly smooth animations." ...

In contrast to this, CSS Animations allow us to work with the DOM and can be composited onto the GPU, meaning we can achieve good performance with maintainable code.