05_react/uebungen/u01_hello-react/src/App.jsx

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+import React from 'react';
+
+function App() {
+  console.log('init App'); // JS logic
+  return (
+    <div className="container pt-5">
+      <h1>Hello React!</h1>
+    </div>
+  ); // JSX - View
+}
+
+export default App;

05_react/uebungen/u01_hello-react/src/index.jsx

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+import React, { StrictMode } from 'react';
+import ReactDOM from 'react-dom/client';
+
+// import von Komponente
+import App from './App';
+
+ReactDOM.createRoot(document.getElementById('root')) //
+  .render(
+    <StrictMode>
+      <App />
+    </StrictMode>,
+  );