https://nextjs.org/docs/app/api-reference/config/next-config-js/reactStrictMode
next.config.js: reactStrictMode | Next.js
Mar 25, 2026 - The complete Next.js runtime is now Strict Mode-compliant, learn how to opt-in
next config jsreactstrictmode
https://nextjs.org/docs/pages/api-reference/config/next-config-js/reactStrictMode
next.config.js Options: reactStrictMode | Next.js
Apr 15, 2025 - The complete Next.js runtime is now Strict Mode-compliant, learn how to opt-in
next config jsoptions