使用模板文字
模板文字允许使用多行字符串，以保留前导/尾随空格和换行符。
class SomeComponent extends React.Component { render() { return ( <pre>{` Hello , World . `}</pre> ) }}class SomeComponent extends React.Component { render() { return ( <pre>{` Hello , World . `}</pre> ) }}ReactDOM.render( <SomeComponent />, document.getElementById('pre'))<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.3/react.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.3/react-dom.min.js"></script><!-- The content rendered into this tag should match the content below. --><div id="pre"></div><pre> Hello , World .</pre>
