可以使用哪些技术在JavaScript中定义类,以及它们的权衡取舍？

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

Person.prototype.sayHello = function() {
  console.log("Hello, my name is " + this.name);
}

const person = new Person("John", 30);
person.sayHello();

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

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

const person = new Person("John", 30);
person.sayHello();

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

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

function createPerson(name, age) {
  const person = {};

  person.name = name;
  person.age = age;

  person.sayHello = function() {
    console.log("Hello, my name is " + this.name);
  }

  return person;
}

const person = createPerson("John", 30);
person.sayHello();