Typescript从名称获取对象属性类型

interface MyObject {
  name: string;
  age: number;
  isStudent: boolean;
}

type MyObjectKeys = keyof MyObject; // "name" | "age" | "isStudent"

function getPropertyType<T, K extends keyof T>(obj: T, key: K): T[K] {
  return obj[key];
}

const myObject: MyObject = {
  name: "John",
  age: 25,
  isStudent: true,
};

const nameType = getPropertyType(myObject, "name"); // string
const ageType = getPropertyType(myObject, "age"); // number
const isStudentType = getPropertyType(myObject, "isStudent"); // boolean