ReactCSSTransitionGroup

【ReactCSSTransitionGroup】

　　ReactCSSTransitionGroup is a high-level API based on ReactTransitionGroup and is an easy way to perform CSS transitions and animations when a React component enters or leaves the DOM.

import ReactCSSTransitionGroup from 'react-addons-css-transition-group'; // ES6
var ReactCSSTransitionGroup = require('react-addons-css-transition-group'); // ES5 with npm

<ReactCSSTransitionGroup
          transitionName="example"
          transitionEnterTimeout={500}
          transitionLeaveTimeout={300}>
          {items}
        </ReactCSSTransitionGroup>

　　You must provide the key attribute for all children of ReactCSSTransitionGroup, even when only rendering a single item. This is how React will determine which children have entered, left, or stayed.

　　

参考：https://facebook.github.io/react/docs/animation.html#getting-started