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Better object oriented pattern in javascript in so mistakes call be avoided in a better way very simple

check the code below

--------------------------------------------------------

https://stackblitz.com/edit/js-9vhtdm?file=index.js

 //better ES5 object oriented in es5

//rules 
//1. you can pass values in any order
//2. default value
//3. handle undefined in a better way  throw new Error





function Hero(obj=undefined)
{
    //if object is null return throw a new Error
    if(obj===undefined)
    {
      throw new Error("Empty Object");
    }
    const {name,age}=obj
    this.name=name;
    this.age=age;
}

//now extend myhero class
function Myhero(obj=undefined)
{
    //now call super class or parent class must
    Hero.call(this,obj);
}
let P=Myhero.prototype=Object.create(Hero.prototype);
P.constructor=Myhero;
P.sayHello=function()
{
    return `my name is => ${this.name} and my age is ${this.age}`;
}

//when u create a instance of Myhero class you can pass values using a object biggest benfit is you can pass value in any order
let H1=new Myhero({name:"manish",age:30});
console.log(H1.sayHello())


let H2=new Myhero({age:29,name:"deepak"});
console.log(H2.sayHello())
//--------------------------------------------ES6 way

class Monster
{
  constructor(obj=undefined)
  {
      if(obj===undefined)
      {
        throw new Error("Empty Object");
      }
      const {name,age}=obj
      this.name=name;
      this.age=age;
  }

}
console.log("---------------------------------------------------------------");
class XMonster extends Monster
{
    constructor(obj=undefined)
    {
       super(obj);
    }
    
   sayHello()
   {
     return `my name is => ${this.name} and my age is ${this.age}`;
   }
}

let M1=new XMonster({name:"manishX",age:30});
console.log(M1.sayHello())


let M1=new XMonster({age:29,name:"deepakY"});
console.log(M1.sayHello())

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