Clean TypeScript

TypeScript best practices for type safety involve enforcing strict type checking, using `unknown` instead of `any`, and applying safe type narrowing to reduce bugs. Recommended `tsconfig.json` settings also enforce strictness across your codebase.

Handle null and undefined values in TypeScript safely by utilizing optional chaining and the nullish coalescing operator. This practice prevents unexpected runtime crashes when accessing deeply nested object properties.

Use discriminated unions in TypeScript to manage clear state transitions and enable exhaustive type checking. This pattern allows you to safely narrow types based on a shared, literal property across related object types.

The best way to maximize TypeScript code reusability is by applying built-in utility types and writing custom generic functions. Generics provide flexible type constraints without duplicating type definitions.

No external project dependencies are required to apply these TypeScript best practices. The guidelines focus on standard language features and recommended `tsconfig.json` strictness settings for immediate integration.