typescript-patterns

To enforce strict type safety in a Next.js project, apply strict compiler options in your tsconfig and use reusable type utilities across modules and data-fetching hooks to reduce runtime errors.

You need discriminated unions for state management when building flexible APIs and state machines that require strong compile-time guarantees to prevent invalid state transitions in your Next.js components.

Use TypeScript generics and conditional types to build type-safe APIs by expressing precise shape constraints across modules, ensuring your data-fetching hooks and utility functions maintain robust compile-time validation.

The best way to refactor a Next.js module is to replace existing types with generic helpers and implement discriminated unions for state management, then run your local dev server to observe type-safety improvements.

No specific external dependencies are required to apply mapped types and generic helpers; you simply need standard TypeScript tooling installed to enforce these type utilities across your Next.js portfolio project.