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Object-oriented Programming in JavaScript

Solidify your understanding of JavaScript and prepare for technical interviews

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What is Object-oriented Programming (OOP)?


Object-oriented programming (OOP) is a popular programming paradigm or style of programming. It’s been around since ‘70s, but unlike tools and frameworks that come and go, OOP is still very relevant today. That’s because it’s not a programming language or a tool. It’s a style of programming.

Why learn OOP?


OOP helps you manage and reduce complexity in software by building re-usable building blocks (objects). Properly designed objects provide a simple interface and hide the unnecessary complexity from the outside, just like a DVD player! A DVD player has a complex logic board on the inside and a few buttons on the outside. When you press the play button, you don’t care how all those microchips talk to each other.

Object-oriented programming helps you:

  • Manage and reduce complexity
  • Eliminate redundant code
  • Build re-usable building blocks
  • Write cleaner code

An essential skills for every developer


OOP comes up in many technical interviews. So if you really want to be a serious developer, you need to understand object-oriented programming. As a technical interviewer myself, if I see a candidate with OOP on their resume, that candidate stands out to me. 

It may interest you to know that many of the popular frameworks out there that you might be using are actually designed with OOP concepts in mind. Angular is an example of such frameworks! 

A Step-by-Step, A to Z course

What you'll get when you sign up for this course:

  • Learn all about object-oriented programming in JavaScript
  • No more wasting time on disjointed tutorials
  • Learn at your own pace - lifetime access - so take your time if you prefer
  • Watch on any device, online or offline
  • Solidify your understanding of JavaScript
  • Prepare for technical interviews
  • Confidently build applications with Node, Angular, React, Vue and other JavaScript libraries
  • Learn the best practices and common pitfalls to avoid
  • Certificate of completion to present to your employer

You'll learn

  • The core principles of OOP: encapsulation, abstraction, inheritance and polymorphism
  • How to implement OOP concepts in JavaScript
  • All about objects, their properties, property descriptors, getters and setters
  • Difference between factory and constructor functions
  • How "this" works in JavaScript
  • Prototypes and prototypical inheritance: one of the confusing parts of JavaScript
  • ES6+ features used in object-oriented programming

This course is for you if:

You’re a developer who already knows OOP principles but want to learn how to implement them in JavaScript.


You’re a developers who is not familiar with OOP, perhaps you just know the basics of JavaScript and want to solidify your understanding of JS and prepare for technical interviews.

Having OOP and JS on your resume helps you
find more jobs and make more money.

"Hi Mosh, I'm really loving your OOP course. I’m finally understanding prototypical inheritance and async programming! I'm 8 months into learning how to become a developer, and making very good progress. My previous instruction before your courses on those subjects wasn't thorough enough to be especially useful. You really hammer home details about constructor functions and the use of the .prototype property. "

- Brian Haller

"After completing this course in Object Oriented programming with JavaScript, I feel much better prepared for jobs which have me use JavaScript in an MVC pattern. Mosh was able to clearly explain the code that he writes so that beginners could understand it. I am able to write cleaner, more eloquent code thanks to his lectures and have enjoyed spending time with this course. I am glad to call Mosh a teacher."

- Mathew Hemmingway

Get started now!



Your Instructor


Mosh Hamedani
Mosh Hamedani

Hi! My name is Mosh Hamedani. Over the last three years, I've taught over 1M students how to code or how to become a better coder through my online courses and YouTube channel.

I've been working as a software engineer for the past 18 years and I love to share my knowledge with you. It’s my mission to make coding accessible to everyone.


Class Curriculum



Frequently Asked Questions


When does the course start and finish?
The course starts now and never ends! It is a completely self-paced online course - you decide when you start and when you finish.
How long do I have access to the course?
How does lifetime access sound? After enrolling, you have unlimited access to this course for as long as you like - across any and all devices you own.
What if I am unhappy with the course?
We would never want you to be unhappy! If you are unsatisfied with your purchase, contact us in the first 30 days and we will give you a full refund.

Full Money Back Guarantee for 30 Days

Try it risk-free

You can ask for a full refund any time during the first 30 days if you decide the course isn’t for you.

Full, instant refund, no questions asked.

"Mosh does a great job of covering the many variants of OOP in JS. He is thorough while being accessible and I really enjoyed his careful review of each concept as we went along."

- Shawn Larkin

Are you ready to take your
JavaScript skills to the next level?

Stop wasting your time jumping from one tutorial to another. Enroll in the course to get:

  • 4 hours of HD videos
  • Exercises and solutions
  • Little known expert tips
  • Best practices to apply
  • Common mistakes to avoid
  • Unlimited access
  • Learn at your own pace
  • Watch online or offline
  • Watch on any devices
  • Certificate of completion

With a 30-day full money-back guarantee, what do you have to lose?

Get started now!