TypeScript Coach

Pick<Type, Keys>

Creates a new type by selecting one or more properties from an object type.

It is useful when you only need a subset of fields from a larger type.

type User = {
  id: number;
  name: string;
  email: string;
  password: string;
};
type UserPreview = Pick<User, 'id' | 'name'>

You can implement your own Pick with an index signature type.

type SimplePick<T, K extends keyof T> = {
    [P in K]: T[P]
}
// New and improved
type MyPick<T, K extends keyof T> = {
  [P in keyof T as K & P]: T[P]
}

The MyPick type is an improved utility type from the TypeScript FAQs.