Deep Omit

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题目

Implement a typeDeepOmit, Like Utility types Omit, A type takes two arguments.

For example:

type obj = {
  person: {
    name: string;
    age: {
      value: number;
    };
  };
};

type test1 = DeepOmit<obj, "person">; // {}
type test2 = DeepOmit<obj, "person.name">; // { person: { age: { value: number } } }
type test3 = DeepOmit<obj, "name">; // { person: { name: string; age: { value: number } } }
type test4 = DeepOmit<obj, "person.age.value">; // { person: { name: string; age: {} } }

解答

type DeepOmit<T, Paths> = Paths extends `${infer K}.${infer R}`
  ? K extends keyof T
    ? {
        [P in keyof T]: P extends K ? DeepOmit<T[P], R> : T[P];
      }
    : T
  : {
      [K in keyof T as K extends Paths ? never : K]: T[K];
    };