<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Learn React</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>
<!-- 生产环境中不建议使用 -->
<script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
ReactDOM.render(
<h1>hello world</h1>, //JSX格式
document.getElementById("root")
);
</script>
</body>
</html>