function Person(name) {
this.name = name;
}
Person.prototype.getName = function() {
return this.name;
}
var person = new Person("John Doe");
person.getName() //"John Doe"/*Prototype is used to add properties/methods to a
constructor function as in example below */
function ConstructorFunction(name){
this.name = name //referencing to current executing object
}
ConstructorFunction.prototype.age = 18
let objectName = new ConstructorFunction("Bob")
console.log(objectName.age) //18* Prototype
-Every object in JavaScript has a built-in property,
which is called its prototype.
-The prototype is itself an object, so the prototype will
have its own prototype, making what iss called a prototype chain.
-The chain ends when we reach a prototype that has null for
its own prototype.
-Prototypes are the mechanism by which JavaScript objects inherit
features from one another
const arr = [1,2,3,4]
// proto type : arr.__proto__
// prototype chain : arr.__proto__.__proto__.__proto__
// constructor function
function Person () {
this.name = 'John',
this.age = 23
}
// creating objects
const person1 = new Person();
const person2 = new Person();/*every object in js inherits properties and methods from it's prototype
which is itself an object */
var a = {}
console.log(a); //{} empty object with __proto__object.
//when we create object then global object Function is created which can be access by Objectr
Object.prototype.name="Shirshak";
console.log(a) // {} empty object with __proto_object which also contain name varibale which value is shirshak