react篇章-React 组件-ES6 class 来定义一个组件

<!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>
</head>
<body>

<div id="example"></div>
<script type="text/babel">
function HelloMessage(props) {
    return <h1>Hello World!</h1>;
}

class Welcome extends React.Component {
  render() {
    return <h1>Hello World1 class</h1>;
  }
};
const element = <Welcome />;

ReactDOM.render(
    element,
    document.getElementById('example')
);
</script>

</body>
</html>