安装：
~~~
npm install md5 --save-dev
~~~
使用举例：
~~~
var React = require('react');
import {render} from 'react-dom';
import md5 from 'md5';
var Index = React.createClass({
getInitialState: function () {
return {
var hash = md5('xxxxxx');
};
},
render: function () {
return (
);
}
});
module.exports = Index;
~~~
