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How can I improve the performance of my React app using code splitting?
Asked on Mar 22, 2026
Answer
Code splitting in React is a powerful technique to improve application performance by breaking down your app into smaller, manageable chunks that can be loaded on demand. This reduces the initial load time and improves the user experience by only loading the necessary code for a given route or component.
<!-- 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` and `Suspense` to dynamically import components only when they are needed.
- Ensure that your build tool (e.g., Webpack) is configured to support code splitting.
- Consider using route-based code splitting with libraries like `react-router` to load components based on the user's navigation.
- Monitor the performance impact using tools like Lighthouse or React Developer Tools.
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