fre.html

<!DOCTYPE html>
<html lang="en">

<head>
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Document</title>
</head>
<script src="./fre.js"> </script>

<body>
     <div id="example"></div>
     <script>
          const {
               render,
               setState,
               createElement
          } = React
          console.log('setState=', setState)
          var element = React.createElement(
               'h1',
               null,
               'Hello, world'
          )

          console.log('element==', element)
          render(React.createElement(
               'h1',
               null,
               'Hello, world'
          ), document.getElementById('example'));


     </script>
</body>

</html>