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TypeScript Utility Types You Should Know

Essential TypeScript utility types for everyday development.

· 1 min read
typescript javascript

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Built-in Utility Types

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Partial and Required

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

type PartialUser = Partial<User>;
type RequiredUser = Required<PartialUser>;

Pick and Omit

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type UserPreview = Pick<User, 'id' | 'name'>;
type UserWithoutEmail = Omit<User, 'email'>;

Advanced Patterns

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Conditional Types

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type IsString<T> = T extends string ? true : false;

Template Literal Types

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Conclusion

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