Run ❯
<!DOCTYPE html> <html lang="en"> <title>Test React</title> <script src= "../../unpkg.com/react%4016.14.0/umd/react.production.min.js"></script> <script src= "../../unpkg.com/react-dom%4016.14.0/umd/react-dom.production.min.js"></script> <script src="../../unpkg.com/babel-standalone%406.15.0/babel.min.js"></script> <body> <div id="root"></div> <script type="text/babel"> function tick() { const element = (<h1>{new Date().toLocaleTimeString()}</h1>); ReactDOM.render(element, document.getElementById('root')); } setInterval(tick, 1000); </script> </body> </html>