
<div class="main">
  <div class="section" id="app1">reactここ</div>
</div>




<!--
<script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>
<script crossorigin src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.js"></script>
-->
<script crossorigin src="https://unpkg.com/react@18/umd/react.production.min.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js"></script>
<script crossorigin src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>


<!--reactスクリプト。type指定忘れずに-->
<script type="text/babel">
  //alert('react');
  ReactDOM.render(
    <h1>Hello, world!</h1>,
    document.getElementById('app1')
  );
</script>
