import React from 'react';
import ReactDOM from 'react-dom';

// Create a new component. This component should produce some HTML.
const App = function() {
  return <div>Hi!</div>;
}

ReactDOM.render(<App />);
  
@@ -199,13 +199,51 @@
 (%3CApp /%3E
+, document.querySelector('.container')
 );%0A  

rendering the target