Next.js 16 エラーハンドリング完全ガイド:error.tsx・global-error.tsx・not-found.tsx・Sentry統合実装パターン(2026年版)
Next.js 16 App Routerのエラーハンドリングを、error.tsx・global-error.tsx・not-found.tsx・Sentry・onRequestErrorの5層で実装するパターンを、100件超の本番障害調査から得た知見と型安全なコードで解説します。
Priya spent four years on Vercel's developer experience team, where she wrote a chunk of the Turbopack incremental cache layer and rewrote the official App Router migration codemods used by tens of thousands of teams. Before that, she shipped the checkout funnel rewrite at Shopify on Next.js 12, cutting LCP from 3.4s to 1.1s on mid-tier Android. These days she runs an independent consultancy helping Series B companies untangle Pages Router monoliths into RSC-first App Router architectures. She has opinions about Server Actions, mostly negative ones, and is slowly coming around on Partial Prerendering after benchmarking it against six production workloads. She writes about cache semantics, streaming SSR, and the parts of the React docs that quietly contradict the Next.js docs. Eight years in frontend, three of them spent yelling at hydration mismatches.
Next.js 16 App Routerのエラーハンドリングを、error.tsx・global-error.tsx・not-found.tsx・Sentry・onRequestErrorの5層で実装するパターンを、100件超の本番障害調査から得た知見と型安全なコードで解説します。