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How can I improve the performance of a React app with lazy loading and code splitting?
Asked on Feb 06, 2026
Answer
Improving the performance of a React app can be effectively achieved through lazy loading and code splitting, which help to reduce the initial load time by loading components only when they are needed. This approach is particularly useful in large applications where not all components are required at once.
<!-- BEGIN COPY / PASTE -->
import React, { Suspense, lazy } from 'react';
const LazyComponent = lazy(() => import('./LazyComponent'));
function App() {
return (
<div>
<Suspense fallback={<div>Loading...</div>}>
<LazyComponent />
</Suspense>
</div>
);
}
export default App;
<!-- END COPY / PASTE -->Additional Comment:
- Use React's
lazy()to dynamically import components, which enables code splitting. - Wrap lazy-loaded components with
Suspenseto handle loading states. - Ensure that the fallback UI in
Suspenseis user-friendly and informative. - Consider using tools like Webpack or Parcel to further optimize code splitting and bundle size.
- Monitor performance improvements using React DevTools and browser performance tools.
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