classintro.js

class Product{
    // name;
    // price;
    // rating;
    //#rating;//now we have declared the rating data member as private so it can't be accesed outside the class,using#
    constructor(n,p,r){
        this.name=n;//this keyword always point towards the plain object which has been created
        this.price=p;
        this.rating=r;
        console.log("Calling the constructor")//whenever object is being created the constructor function is called
     //if we have not defined the constructor then default constructor is called otherwise the construtor which we have created wil be called.
        //return 10; if you're returning primitive then it will be not returned
        return{x:0,y:20}//if you're returning non-primitive then it will be returned.
    //the main work of constructor is to return the object , if we have not created any custom object then it will return the object to which this keyword is pointing.
    //and if we have created an custom object it will return the custom object and will not return the object to which this keyword is pointing.
    }
    display(){//we have the access of this keyword in member functions
        console.log("Displaying the current product",this.name,this.price,this.rating)
    }
    static custom(){
        console.log("static function is called")//custom is a static function
    }
}
const p=new Product("Iphone",70000,5)//new creates an empty plain object.
//in the above piece of code we are calling the constructor method.
const o=new Product("Samsung",90000,5);
console.log(p)
//o.display();//this keyword refers to calling context and point towards the object if we obejct o is calling the member fucntion then it will show the key-values of the object o on calling the display function
//p.display();
//and p  calls the member function  after object o,so it will show the key-value of object p after object o
Product.custom();
//static funtion are always called using the class name , and not by the object name.