To test the lazy loading implementation, you should verify that components are being loaded dynamically and that the chunk files are being requested correctly. Here's how to test and verify: 1. Open your browser's developer tools (F12 or Cmd+Opt+I) 2. Go to the Network tab 3. Navigate through your application routes that use lazy loading 4. Verify that JavaScript chunk files are being requested only when needed 5. Check the Sources tab to see if the chunks are being loaded dynamically Here's a basic example of how you might structure your lazy loaded route: ```javascript import React, { Suspense } from 'react'; import { Route, Switch } from 'react-router-dom'; const VideoGallery = React.lazy(() => import('./VideoGallery')); const VideoPlayer = React.lazy(() => import('./VideoPlayer')); function App() { return ( Loading Video Gallery...}> Loading Video Player...}> ); } ``` To simulate and verify the loading behavior: 1. Clear the browser cache 2. Watch the Network tab while navigating 3. You should see chunk files being loaded only when accessing specific routes 4. Verify that the loading states appear and disappear as expected Best practices: - Always monitor the performance metrics in the Chrome DevTools Performance tab - Ensure that the loading states provide good user feedback - Test on slow network conditions to verify behavior Further reading: - [React Code Splitting Documentation](https://reactjs.org/docs/code-splitting.html) - [React Lazy and Suspense](https://reactjs.org/docs/concurrent-mode-reference.html#reactlazy) - [Webpack Chunk Loading](https://webpack.js.org/guides/code-splitting/)