app component

js/components/app.js

@@ -0,0 +1,9 @@
+import React from 'react';
+
+class App extends React.Component {
+    render() {
+        return <h1>Hello!</h1>;
+    }
+}
+
+export default App;

js/components/heading.js

@@ -1,9 +0,0 @@
-import React from 'react';
-
-class Heading extends React.Component {
-    render() {
-        return <h1>Hello, {this.props.title}!</h1>;
-    }
-}
-
-export default Heading;

js/index.js

@@ -1,8 +1,8 @@
 import ReactDOM from 'react-dom';
 import React from 'react';
-import Heading from './components/heading.js';
+import App from './components/app.js';
 
 ReactDOM.render(
-  <Heading title="Matt"/>,
+  <App/>,
   document.querySelector('main')
 );