Configuring TypeScript Strict Mode in a Next.js Project

TypeScript strict mode improves type safety and reduces runtime errors.

Environment

Next.js 16, TypeScript 5, standard tsconfig.json generated by create-next-app.

Working approach

Enable strict: true in tsconfig.json. Review errors and fix missing types, null checks, and implicit any types.

Verification

Run npm run build. A clean build indicates strict settings are satisfied.