next-best-practices

Next.js data fetching best practices recommend using Server Components for direct data access, Server Actions for mutations, and Route Handlers for API endpoints. Choosing the right pattern depends on whether you need streaming, caching, or client-side interaction.

React Server Component boundary errors in Next.js occur when invalid patterns cross Server and Client components. To resolve them, ensure you pass serializable props and correctly use directives to separate server-only logic from client-side interactivity.

Next.js error handling best practices use error.tsx for route-level recovery and global-error.tsx for application-wide boundaries. These files catch runtime errors, display fallback UI, and allow users to retry the failed segment without unmounting the layout.

Next.js optimization best practices involve using the built-in Image component for responsive loading and automatic format conversion. Font optimization is handled by next/font to prevent layout shifts and reduce external network requests during hydration.

Parallel and intercepting routes in Next.js are used for advanced routing patterns like modals and nested layouts. Use them when you need to render multiple route segments simultaneously or intercept navigation to show contextual UI without leaving the current route.

Next.js hydration errors happen when server-rendered HTML mismatches client-side rendering. Debugging hydration errors involves checking for browser-only APIs, timestamps, or random values in your components, and ensuring consistent rendering between server and client.