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Next.js App Router Production Debugging Guide

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Next.js App Router Debugging

A concise guide to diagnosing production-only issues in Next.js App Router:

  • Compare server vs client output, capture HTML snapshots.
  • Use use client boundaries carefully; avoid client-only logic in RSC.
  • Log hydration keys and props; diff checksum-like markers.
  • Validate data freshness and cache headers end-to-end.

References: Next.js 14+, React 18, Vercel platform.

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