Typescript:如何定义条件typescript属性来访问React中的对象？

type ReactObject<T, K extends keyof T> = T[K] extends object ? T[K] : never;

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

// 使用示例
interface Person {
  name: string;
  age: number;
  address: {
    city: string;
    country: string;
  };
}

const person: Person = {
  name: "John",
  age: 25,
  address: {
    city: "New York",
    country: "USA",
  },
};

const city = getProperty(person, "address").city; // 类型推断为 string
const country = getProperty(person, "address").country; // 类型推断为 string
const invalid = getProperty(person, "age").country; // 编译错误，age属性不是对象类型