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 UserInfo extends React.Component {
	nationality(string) {
	  return string;
  }
  render() {
    const userInfo = {
      age: 12,
      nationality: 'Random',
    };
    return (
      <div>
        {userInfo.age && <b>{userInfo.age} • </b>}
        {userInfo.nationality && this.nationality(userInfo.nationality)}
      </div>
    );
  }
}

ReactDOM.render(
  <UserInfo />,
  document.getElementById('container')
);