React is not defined about ngreact HOT 5 CLOSED

require('angular/angular');
require('angular-route/angular-route');
require('angular-animate/angular-animate');
require('flux-angular');
require('react');
require('ngreact');

// Declare app level module ---------------------------------------------------
var app = angular.module('app', ['ngRoute', 'ngAnimate', 'flux', 'react']);

require('./shared');
require('./components');

require('./header/header.js');

var React = require('react');

var Hello = React.createClass( {
    propTypes: {
        fname: React.PropTypes.string.isRequired,
        lname: React.PropTypes.string.isRequired
    },

    render: function() {
        return React.DOM.span( null,
            'Hello ' + this.props.fname + ' ' + this.props.lname
        );
    }
} );

angular.module('app').value( "Hello", Hello );
angular.module('app').directive( 'hello', function( reactDirective ) {
    return reactDirective( Hello );
} );

var React = require('react');

var Hello = React.createClass( {