[Javascript] Object constructor

//Object constructor

//Object constructor khai báo với declare function

function User(firstName,lastName,avatar) {

   this.firstName=firstName;

   this.lastName=lastName;

   this.avatar=avatar;

   this.getName=function(){

      return `${this.firstName} ${this.lastName}`;

   }

}

//Object constructor khai báo với express function

var use=function (firstName,lastName,avatar) {

   this.firstName=firstName;

   this.lastName=lastName;

   this.avatar=avatar;

   this.getName=function(){

      return `${this.firstName} ${this.lastName}`;

   }

}

   var use=new User('Hải','Trương','Avatar')

   var cus=new User('Giang','Nguyễn','Avatar')

//Thêm thuộc tính cho use

   use.tittle='Chia sẻ FB'

   console.log(use.getName());