How to overload constructor of an Object in JS (Javascript)?

Question

Can I do something like?:

function User(form) {
    this._username = form.username.value;
    this._password = form.password.value;
    this._surname = form.surn         


        

Answer 1

You can create constructor using ES6 features as below.

class Person {
  constructor(name, surname) {
    if (typeof name === "object") {
      this.name = name.name;
      this.surname = name.surname;
    } else {
      this.name = name;
      this.surname = surname;
    }
  }
}

const person1 = new Person("Rufat", "Gulabli");
const person2 = new Person({ name: "Rufat", surname: "Gulabli" });
const person3 = new Person();
console.log(person1);
console.log(person2);
console.log(person3);

Print Out:

• Person { name: 'Rufat', surname: 'Gulabli' }
• Person { name: 'Rufat', surname: 'Gulabli' }
• Person { name: undefined, surname: undefined }