JavaScript is one of the most popular languages used by programmers all around the world. In this course, you'll be introduced to the Object-Oriented Paradigm of JavaScript. The course will discuss OOP in both, ES5 and ES6 versions of JavaScript. It begins with a basic introduction to what Object-Oriented programming is, followed by its comparison to other languages. It then introduces the new  OOP features available in ES6 version and compares it to the ES5 version. The course then discusses objects in JavaScript followed by the use of function as objects in OOP. It goes over the interesting concepts of prototype objects, data encapsulation, and classes. It then delves into the more complex concepts of inheritance in both the versions, including prototypal inheritance, prototype chaining, method overriding and mixins. The course is filled with interesting illustrations to help in your understanding of the concepts as well as numerous quizzes and exercises to help you practice.

Learn Object-Oriented Programming in JavaScript


## Adding Properties

We already discussed why properties could be added to the *prototype* object of a *constructor* function. Now let' look at the method to do so.


### Syntax
Here is how *properties* can be added to a *constructor* function using the *prototype* property:


ConstructorFunctionName.prototype.PropertyName = PropertyValue

Since the property is being defined on the *prototype* of the *constructor function*, the double dot notation has to be used to set the property values. First, the prototype property is accessed using the dot notation, and then the property is defined on it using the dot operator.

Similarly, the double dot notation has to be used to get the property values defined on the prototype object as well.


# Adding Properties

We already discussed why properties could be added to the *prototype* object of a *constructor* function. Now let' look at the method to do so.


## Syntax
Here is how *properties* can be added to a *constructor* function using the *prototype* property:


This lesson teaches how to add properties and methods to an object prototype.

Introduction

Objects in JavaScript

Functions as Objects

Classes

Inheritance

Using Prototype Objects

Adding Properties

Syntax