React Base Fiddle (JSX)

Starting point for creating JSFiddles with React.

HTML

<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

Babel + JSX

class Hello extends React.Component {
  render() {
    return <div>Hello {this.props.name}</div>;
  }
}

ReactDOM.render(
  <div>
    <p tabIndex={-1}
       style={{}}
       onKeyDown={event => alert(event.keyCode)}>
      Click to focus, then hit a key.
    </p>
    
  </div>,
  document.getElementById('container')
);