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JavaScript Add Methods to a Constructor Function Using Prototype

SAMER SAEID answered on April 2, 2022 Popularity 8/10 Helpfulness 2/10

answer JavaScript Add Methods to a Constructor Function Using Prototype

related javascript constructor and prototype

JavaScript Add Methods to a Constructor Function Using Prototype

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// constructor function
function Person () {
    this.name = 'John',
    this.age = 23
}

// creating objects
const person1 = new Person();
const person2 = new Person();

// adding a method to the constructor function
Person.prototype.greet = function() {
    console.log('hello' + ' ' +  this.name);
}

person1.greet(); // hello John
person2.greet(); // hello John

Popularity 8/10 Helpfulness 2/10 Language javascript

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Tags: add constructor function javascript methods prototype using

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Contributed on May 21 2022

SAMER SAEID

0 Answers Avg Quality 2/10

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javascript constructor and prototype

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//Define the object specific properties inside the constructor
function Human(name, age){
	this.name = name,
	this.age = age,
	this.friends = ["Ali", "Shehzad"]
}
//Define the shared properties and methods using the prototype
Human.prototype.sayName = function(){
	console.log(this.name);
}
//Create two objects using the Human constructor function
var person1 = new Human("Mohtashim", 31);
var person2 = new Human("Fasih", 40);

//Lets check if person1 and person2 have points to the same instance of the sayName function
console.log(person1.sayName === person2.sayName) // true

//Let's modify friends property and check
person1.friends.push("Fasih");

console.log(person1.friends)// Output: "Ali, Shehzad, Fasih"
console.log(person2.friends)//Output: "Ali, Shehzad"

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: constructor cons

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Contributed on Apr 02 2022

Comfortable Curlew

0 Answers Avg Quality 2/10

JavaScript Add Methods to a Constructor Function Using Prototype

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