在低版本的react中，npm调用react addon时，用

var React = require("react/addons");

Warning: require('react/addons') is deprecated. Access using require('react-addons-{addon}') instead

一：npm下载新的addon包，在官网上已经讲的十分清楚

Add-onsEdit on GitHub

The React add-ons are a collection of useful utility modules for building React apps.These should be considered experimentaland tend to change more often than the core.

• TransitionGroupandCSSTransitionGroup,for dealing with animations and transitions that are usually not simple to implement,such as before a component's removal.
• LinkedStateMixin,to simplify the coordination between user's form input data and the component's state.
• cloneWithProps,to make shallow copies of React components and change their props.
• createFragment,to create a set of externally-keyed children.
• update,a helper function that makes dealing with immutable data in JavaScript easier.
• PureRenderMixin,a performance booster under certain situations.
• shallowCompare,a helper function that performs a shallow comparison for props and state in a component to decide if a component should update.

The add-ons below are in the development (unminified) version of React only:

• TestUtils,simple helpers for writing test cases (unminified build only).
• Perf,for measuring performance and giving you hint where to optimize.

To get the add-ons,install them individually from npm (e.g.,npm install react-addons-pure-render-mixin). We don't support using the addons if you're not using npm.

如我想引入动画插件 则写成

npm install react-addons-css-transition-group

二：引入新的文件

 var React = require("react");
 var CSSTransitionGroup = require('react-addons-css-transition-group')

这样就不会再报警告了 而且react高版本会彻底废弃react/addons写法 请尽早更改为单独调用形式