typescript中JavaScript的符号类型是接口还是类型？

// 使用接口定义符号类型
interface Person {
  name: string;
  age: number;
}

// 使用类型定义符号类型
type Point = {
  x: number;
  y: number;
};

// 使用接口实现符号类型
class Student implements Person {
  name: string;
  age: number;
  constructor(name: string, age: number) {
    this.name = name;
    this.age = age;
  }
}

// 使用类型别名定义复杂类型
type Result<T> = {
  success: boolean;
  data: T;
};

// 使用联合类型
type Status = "success" | "error";

// 使用交叉类型
type Admin = Person & {
  role: string;
};

// 使用符号类型
const person: Person = {
  name: "John",
  age: 25,
};

const point: Point = {
  x: 10,
  y: 20,
};

const result: Result<string> = {
  success: true,
  data: "Hello, world!",
};

const status: Status = "success";

const admin: Admin = {
  name: "Admin",
  age: 30,
  role: "admin",
};