与 ES5 相比，React 的 ES6 语法有何不同？

以下语法是 ES5 与 ES6 中的区别：

1.require 与 import

// ES5
var React = require('react');

// ES6
import React from 'react';

2.export 与 exports

// ES5
module.exports = Component;

// ES6
export default Component;

3.component 和 function

// ES5
var MyComponent = React.createClass({
    render: function() {
        return
            <h3>Hello Edureka!</h3>;
    }
});

// ES6
class MyComponent extends React.Component {
    render() {
        return
            <h3>Hello Edureka!</h3>;
    }
}

4.props

// ES5
var App = React.createClass({
    propTypes: { name: React.PropTypes.string },
    render: function() {
        return
            <h3>Hello, {this.props.name}!</h3>;
    }
});

// ES6
class App extends React.Component {
    render() {
        return
            <h3>Hello, {this.props.name}!</h3>;
    }
}

5.state

// ES5
var App = React.createClass({
    getInitialState: function() {
        return { name: 'world' };
    },
    render: function() {
        return
            <h3>Hello, {this.state.name}!</h3>;
    }
});

// ES6
class App extends React.Component {
    constructor() {
        super();
        this.state = { name: 'world' };
    }
    render() {
        return
            <h3>Hello, {this.state.name}!</h3>;
    }
}

.