五、Typescript5-TS工具类型

TS自带的工具类型

官网地址：

Omit

去掉某个属性

interface User {
    id: number;
    name: string;
    gender: string;
}
type StudentWithoutGender = Omit<User, "gender">;

pick

选择某个属性

interface User {
    id: number;
    name: string;
    gender: string;
}
type StudentWithoutGender = Omit<User, "gender">;
// Pick选择某个属性
type StudentWithName = Pick<User, "name">;
type StudentWithoutGender1 = Pick<User, "id" | "name">;

Partial

将属性变成可选的

interface User {
    id: number;
    name: string;
    gender: string;
}
// Partial将属性变成可选的
type StudentPartial = Partial<User>;
const student:StudentPartial = {
    id: 123,
    name: "hello",
}

Record

构建一个对象类型

type StudentRecord = Record<"name" | "age", string>;
const s: StudentRecord = {
    name: "hello",
    age: "18",
}