<html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>React App</title> <script src="https://cdn.staticfile.org/react/16.13.0/umd/react.development.js"></script> <script src="https://cdn.staticfile.org/react-dom/16.13.0/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="root"></div> <script type="text/babel"> class MyForm extends React.Component { constructor(props) { super(props); this.state = { mycar: 'Volvo' }; } render() { return ( <form> <select value={this.state.mycar}> <option value="Ford">Ford</option> <option value="Volvo" selected>Volvo</option> <option value="Fiat">Fiat</option> </select> </form> ); } } ReactDOM.render(<MyForm />, document.getElementById('root')); </script></body></html>