jsx语法规则 

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>菜鸟教程 React 实例</title>
<script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
<script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
<script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
<style>
.foo{
	color:red;
}
</style>
</head>
<body>
	<div id="root"></div>
	<script type="text/babel">
	const element = <h1 className="foo">Hello, world</h1>;
	ReactDOM.render(element, document.getElementById('root'));
	</script>
</body>
</html>

1.1. render(){} 中必须被一个单独的大标签包裹，比如div或者section

posted on 2021-03-09 13:43  武当山大神父王喇嘛  阅读(36)  评论(0)    收藏  举报