To implement lazy loading in React, use the React.lazy() function for components and Suspense for fallback handling. For example:

const LazyComponent = React.lazy(() => import('./LazyComponent'));
function App() {
 return (
   <Suspense fallback={<div>Loading...</div>}>
     <LazyComponent />
   </Suspense>
 );
}

For routing, use React.lazy() with React Router:

const HomePage = React.lazy(() => import('./HomePage'));
<Route path="/" component={HomePage} />

This will load components only when they are needed.