React 101

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.0/react-dom.min.js"></script>
<div id="app"/>

Babel + JSX

const App = (props) => (
	<div>
	  <p>Hello, {props.name}</p>
    <p>you are {props.age} years old</p>
	</div>
);

ReactDOM.render(
	<App name="Arunoda Susiripala" age="20"/>,
  document.getElementById('app')
);