PickReadonly<T, K>

Overview

Creates a new type where the specified keys are made readonly, while keeping the rest of the type remain unchaged.

Syntax

type PickReadonly<T, K extends keyof T> = Simplify<
  Omit<T, K> & Readonly<Pick<T, K>>
>;

• T: The original type from which keys are being picked.
• K: The keys from the original type T that should be made readonly.

Example

type User = {
  id: number;
  image: string;
  name: string;
  age: string;
  job: string;
  hobby: string[];
};

type SomeReadonlyUser = PickReadonly<User, 'image' | 'name' | 'age' | 'job'>;
// Result will be:
// {
//   id: number;
//   readonly image: string;
//   readonly name: string;
//   readonly age: string;
//   readonly job: string;
//   hobby: string[];
// };