react router animation example

https://github.com/reactjs/react-router/tree/80c71d57c936ed54babdde44309c01f6a4b56b77/examples/animations

https://github.com/chenbeitingting/react-route-page-animation/blob/master/app.js

https://github.com/chirigarikku/react-router-animation-demo

https://facebook.github.io/react/docs/animation.html