What are the best practices for code splitting in React?

What are the best practices for code splitting in React?

Code splitting in React helps improve performance by loading only the necessary code. Some best practices include using dynamic imports, leveraging React.lazy and Suspense, and splitting routes.

Can you explain how to use React.lazy and Suspense?

Sure! You can use React.lazy to dynamically import a component. Wrap it in a Suspense component to handle loading states. Here's a quick example:

const LazyComponent = React.lazy(() => import('./LazyComponent'));

<Suspense fallback={<div>Loading...</div>}>
  <LazyComponent />
</Suspense>

What are some common pitfalls to avoid with code splitting?

Common pitfalls include over-splitting, which can lead to too many small bundles, and not handling loading states properly, which can result in a poor user experience.

How can I measure the performance impact of code splitting?

You can use tools like Lighthouse or Webpack Bundle Analyzer to measure the performance impact. They help visualize bundle sizes and loading times.