js原型对象

class Person {
  constructor(name,age) {
    this.name = name;
    this.age = age;
  }
  toString() {
    return '(' + this.name + ', ' + this.age + ')';
  }
};
let ruben = new Person("ruben",21);
console.log(ruben.toString())

(ruben,21)

Person.prototype.toString = function(){
    return "Person{" +
            "name='" + this.name + '\'' +
            ", age=" + this.age +
            '}';
}
console.log(ruben.toString())

Person{name='ruben', age=21}

console.log(Person.prototype)