来自React的DOM差异文档：
所有DOM属性和属性（包括事件处理程序）都应包含驼峰，以与标准Javascript样式保持一致。
如果您检查浏览器的控制台，您会看到React对此警告您：
<meta charset="UTF-8"><script src="https://npmcdn.com/react@15.2.1/dist/react.js"></script><script src="https://npmcdn.com/react-dom@15.2.1/dist/react-dom.js"></script><script src="https://npmcdn.com/babel-core@5.8.38/browser-polyfill.min.js"></script><script src="https://npmcdn.com/babel-core@5.8.38/browser.min.js"></script><div id="app"></div><script type="text/babel">var App = React.createClass({ render() { return <table border="1"> <tbody> <tr> <th colspan="2">people are...</th> </tr> <tr> <td>monkeys</td> <td>donkeys</td> </tr> </tbody> </table> }})ReactDOM.render(<App who="World"/>, document.querySelector('#app'))</script>Warning: Unknown DOM property colspan. Did you mean colSpan? in th (created by App) in tr (created by App) in tbody (created by App) in table (created by App) in App
