TypeScript 中 Omit、Pick、 Partial、Required

Omit 和 Pick

用于创建仅具有原始类型的一组选项的新类型。

interface User {
      id?: number;
      firstname: string;
      lastname?: string;
      age: number;
      telephone?: number;
      twitter?: string;
}

1. Omit: 删除定义字段

type UserPost = Omit<User, 'id'>;
// 结果
{
    firstname: string;
    lastname?: string;
    age: number;
    telephone?: number;
    twitter?: string;
}

1. Pick: 只拿定义的字段

type UserFullname = Pick<User, 'firstname' | 'lastname'>;
// 结果
{
    firstname: string;
    lastname?: string;
}