如何在TypeScript/Angular中初始化类型化对象？

class Person {
  name: string;
  age: number;

  constructor(name: string, age: number) {
    this.name = name;
    this.age = age;
  }
}

const person = new Person("John", 25);

const person = {
  name: "John",
  age: 25
};

const person = {} as Person;
person.name = "John";
person.age = 25;

const person = Object.assign({}, { name: "John", age: 25 });