prototype

 // objects inherit properties and methods 

from a prototype:

//prototype property allows you

 to add new properties to object constructors:

//class..

1:---

function obj(info){

    this.name=info;

}

obj.prototype.address="gurugram";

obj.prototype.showdata=function(){

    return this.address;

}

let obj1=new obj('raj')

console.log(obj1.showdata());

2:-----

class A{

    name;

    age;

    constructor(n,a){

        this.name=n;

        this.age=a;

    }

}

ob=new A("amit",23);

console.log(ob.name);

ob1=new A("raj",34);

ob.address="gurugram";

//console.log(ob);

//console.log(ob1.address);

//classname.prototype.key='value';

A.prototype.address="gurgram";

console.log(ob1);

console.log(ob1.address);

..........................

//let a=[1,2,3,4];

//additional property..by prototype..

//array object functon:---all object..

let user={

    "name":"gaurav",

    "rollno":2

}

let user1={

    "name":"gaurav1",

//    "rollno":3

}

user1.__proto__=user;//prototype inheritance..

console.log(user1);

...............

The Object.prototype is on the top of the prototype inheritance chain:

console.log(Object.prototype);

console.log(user1);