Implement a generic PartialByKeys<T, K> which takes two type argument T and K.

partial-by-keys.ts

interface User {
  name: string;
  age: number;
  address: string;
}

type PartialByKeys<T, K = keyof T> = Merge<
  {
    [P in keyof T as P extends K ? P : never]?: T[P];
  } & {
    [P in keyof T as P extends K ? never : P]: T[P];
  }
>;

type Merge<T> = {
  [P in keyof T]: T[P];
};

type UserPartialName = PartialByKeys<User, "name">;
// { name?:string; age:number; address:string }