// src/HeavyWidget.jsx export default function HeavyWidget() { return

I'm a lazy-loaded component.

; } // src/App.jsx import { lazy, Suspense } from "react"; const HeavyWidget = lazy(() => import("./HeavyWidget")); function App() { return ( Loading...

}>
); } export default App; /* Notes: - HeavyWidget.jsx exports its component as a default export — lazy() specifically requires this. - Opening the browser's network tab and reloading shows HeavyWidget's code arriving as a separate JS chunk request, not bundled into the main app bundle. - The "Loading..." fallback would be visible briefly even on a fast connection, in the moment between the chunk request starting and finishing. */