how to use html inside react code example

Example: React Directly in HTML

<!DOCTYPE html>
<html>
  <script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
  <script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
  <script src="https://unpkg.com/[email protected]/babel.min.js"></script>
  <body>
  
    <div id="mydiv"></div>

    <script type="text/babel">
      class Hello extends React.Component {
        render() {
          return <h1>Hello World!</h1>
        }
      }

      ReactDOM.render(<Hello />, document.getElementById('mydiv'))
    </script>
  </body>
</html>

Tags:

Html Example