Utility Types

Built-in type helpers for common transformations.

Official docs

Utility Types — typescriptlang.org

Common Utilities

Type	Purpose
Partial<T>	All properties optional
Required<T>	All properties required
Pick<T, K>	Select subset of keys
Omit<T, K>	Exclude keys
Record<K, V>	Object with key type K and value type V

Example

interface User {
  id: number;
  name: string;
  email: string;
}

type UserPreview = Pick<User, 'id' | 'name'>;
type UserUpdate = Partial<Omit<User, 'id'>>;

Upstream Links

• Mapped Types