我应该如何从函数中返回对象？

function createPerson() {
  return { name: 'John', age: 30 };
}

const person = createPerson();
console.log(person); // { name: 'John', age: 30 }

function Person(name, age) {
  this.name = name;
  this.age = age;
}

function createPerson(name, age) {
  return new Person(name, age);
}

const person = createPerson('John', 30);
console.log(person); // Person { name: 'John', age: 30 }

function createPerson(name, age) {
  return {
    name: name,
    age: age,
    sayHello: function() {
      console.log('Hello, my name is ' + this.name);
    }
  };
}

const person = createPerson('John', 30);
console.log(person); // { name: 'John', age: 30, sayHello: [Function] }
person.sayHello(); // Hello, my name is John

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  sayHello() {
    console.log('Hello, my name is ' + this.name);
  }
}

function createPerson(name, age) {
  return new Person(name, age);
}

const person = createPerson('John', 30);
console.log(person); // Person { name: 'John', age: 30 }
person.sayHello(); // Hello, my name is John