TypeScript Best Practices in 2024

TypeScript continues to evolve. Here are modern patterns and practices to level up your code.

Strict Mode

Always enable strict mode in tsconfig:

{
  "compilerOptions": {
    "strict": true
  }
}

Utility Types

Master built-in utility types:

type UserWithoutId = Omit<User, 'id'>;
type ReadonlyUser = Readonly<User>;
type PartialUser = Partial<User>;

Type Guards

Create type-safe guards for runtime checks:

function isUser(obj: unknown): obj is User {
  return typeof obj === 'object' && obj !== null && 'name' in obj;
}

Conclusion

TypeScript's type system is powerful. Use it to catch errors early and document your code.