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

The method to protect the class properties in ES6 is similar to what we discussed in the [previous](https://www.educative.io/collection/page/5429798910296064/5907042445295616/6034811330232320) chapter. 

## Hiding Properties in ES6

In order to hide the *class properties*, they can be declared inside the `constructor` using the `var` *keyword* so that they're only accessible through getters/setters, which can also be defined inside the `constructor`. 

As discussed for the ES5 version, the convention of using `_` prefix before values that need to be protected is also followed in the ES6 version. 

## Example 

Let's take a look at an example that implements data hiding in ES6 version:

The method to protect the class properties in ES6 is similar to what we discussed in the [previous](https://www.educative.io/collection/page/5429798910296064/5907042445295616/6034811330232320) chapter. 

# Hiding Properties in ES6

In order to hide the *class properties*, they can be declared inside the `constructor` using the `var` *keyword* so that they're only accessible through getters/setters, which can also be defined inside the `constructor`. 

As discussed for the ES5 version, the convention of using `_` prefix before values that need to be protected is also followed in the ES6 version. 

# Example 

Let's take a look at an example that implements data hiding in ES6 version:

This lesson explains the steps to hide properties in the ES6 version of classes.

Introduction

Objects in JavaScript

Functions as Objects

Classes

Inheritance

Protecting Properties

Hiding Properties in ES6