The answer
Use protected routes. Wrap authenticated routes in a component that checks auth state and redirects unauthenticated users to login. Do not scatter auth checks across every page component.
React Router Best Practices for Scalable React Apps
How do I handle authentication in React Router?
More FAQs in React Router Best Practices for Scalable React Apps
Use nested routes for shared layouts, centralize route definitions in a single file or folder, use protected routes for authenticated pages, and lazy load large route components to keep the initial bundle small.
Modern React Router supports loaders for fetching data tied to a route and actions for handling mutations. They run before the route renders, so your components stay clean and data is ready when the page mounts.
Yes, for large routes. Lazy loading with React.lazy and Suspense keeps the initial bundle small and improves the first load. React Router works well with lazy components.
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