I read about ReactTransitionGroup, what is the advantage over the usual css animation?

Question

React

https://facebook.github.io/react/docs/animation.html
as far as I understand it hangs the same transition through its own set of classes.
Or did I misunderstand?
Who used it, where can I look at work?

Answer 1

From the documentation:
That is, this is not a replacement for the usual css animation, but as the authors write: an easy way to write css animation for react components that appear or are removed from the DOM
Through your set of classes. With the transition group, you just specify which classes will be used.