CF

Object-oriented Programming in JavaScript

3h 53m 46s
English
Paid
Updated September 2026

Object-oriented Programming in JavaScript is a 57-lesson 3 hours 53 minutes self-paced course by Mosh Hamedani (Code with Mosh), Udemy. Object-oriented programming has been part of software development since the 1970s, and unlike specific frameworks or tools that come and go, it has stuck around because it's a way of thinking about code, not a technology to memorize.

Course facts

Lessons
57
Duration
3 hours 53 minutes
Level
All levels
Language
English
Updated
2026-09-11
Instructor
Mosh Hamedani (Code with Mosh), Udemy
Price
Premium

Object-oriented programming has been part of software development since the 1970s, and unlike specific frameworks or tools that come and go, it has stuck around because it's a way of thinking about code, not a technology to memorize. This 57-lesson course builds that thinking from the ground up.

Why it still matters

The core idea is hiding complexity behind a simple interface — much like a DVD player has complicated internals but only a few buttons you actually need to touch. Applied to code, OOP helps you:

  • Manage and reduce complexity in larger codebases
  • Cut down on redundant, repeated code
  • Build objects you can reuse across a project
  • Write code that's easier for the next developer to follow

Interview relevance

OOP questions come up regularly in technical interviews, and a candidate who clearly understands the paradigm — not just the syntax — tends to stand out. It's also the design foundation behind many of the popular frameworks developers use daily, so understanding it makes those tools easier to reason about too.

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

Who teaches Object-oriented Programming in JavaScript?

Mosh Hamedani (Code with Mosh)

Mosh Hamedani (Code with Mosh) thumbnail

Mosh Hamedani is the founder of Code with Mosh, one of the highest-volume independent online instructors in software education. He has been publishing courses continuously since the early Udemy era and has taught over a million students across his Udemy catalog and his standalone Code with Mosh platform. His teaching style is patient, rigorously structured, and deliberately beginner-tolerant — the courses are widely cited as some of the most accessible introductions to their respective topics.

The Code with Mosh catalog covers an unusually wide span: web development with HTML / CSS / JavaScript / React / Angular / Node.js, Python and Django, C# and .NET, mobile development with React Native and Flutter, SQL and database fundamentals, and the algorithm / data-structure interview prep tracks. Few independent instructors maintain this much breadth at consistent quality.

The CourseFlix listing under this source carries over 35 Code with Mosh courses spanning that range. Material is paid; Code with Mosh runs on per-course pricing on the original platform. Courses are aimed primarily at developers picking up a new technology from a clean start through to working production proficiency.

Udemy

Udemy thumbnail

Udemy is the largest open marketplace for online courses on the internet. Founded in 2010 by Eren Bali, Oktay Caglar, and Gagan Biyani and headquartered in San Francisco, the company went public on the Nasdaq in 2021 under the ticker UDMY. The platform hosts well over two hundred thousand courses across software development, IT and cloud, data science, design, business, marketing, and creative skills, taught by tens of thousands of independent instructors. Roughly seventy million learners use it worldwide, and the corporate arm — Udemy Business — supplies a curated subset of that catalog to enterprise customers.

Because Udemy is a marketplace rather than a single editorial publisher, the catalog is uneven by design. The strongest material lives in the long-form, project-based courses authored by working engineers — full-stack JavaScript, React, Node.js, Python data science, AWS, Docker and Kubernetes, mobile development with Flutter and React Native, and cloud certification preparation. The CourseFlix listing under this source is the slice of that catalog that has been mirrored here for offline-friendly viewing, organized by topic and updated as new releases land. Pricing on Udemy itself swings dramatically with the site's near-permanent sales, which is why the platform is best treated as a deep reference catalog: pick instructors with strong reviews and a track record of updating their material rather than buying on the headline price alone.

What lessons are included in Object-oriented Programming in JavaScript?

This is a demo lesson (10:00 remaining)

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#1: What is OOP?
All Course Lessons (57)
#Lesson TitleDurationAccess
1
What is OOP? Demo
01:46
2
Four Pillars of OOP
07:03
3
Setting Up the Development Environment
02:17
4
Course Structure
02:56
5
1- Introduction
00:46
6
2- Object Literals
03:04
7
3- Factories
02:52
8
4- Constructors
05:37
9
5- Constructor Property
02:25
10
6- Functions are Objects
04:48
11
7- Value vs Reference Types
05:50
12
8- Adding or Removing Properties
03:54
13
9- Enumerating Properties
02:51
14
10- Abstraction
04:03
15
11- Private Properties and Methods
04:06
16
Getters and Setters
05:37
17
14- Exercise- Stop Watch
02:09
18
15- Solution- Stopwatch
02:32
19
1- Inheritance
02:27
20
2- Prototypes and Prototypical Inheritance
05:34
21
3- Multi-level Inheritance
02:52
22
4- Property Descriptors
05:08
23
5- Constructor Prototypes
03:53
24
6- Prototype vs. Instance Members
06:05
25
7- Iterating Instance and Prototype Members
02:40
26
8- Avoid Extending the Built-in Objects
01:42
27
10- Exercise
01:34
28
11- Solution
05:39
29
1- Creating Your Own Prototypical Inheritance
05:35
30
2- Resetting the Constructor
04:02
31
3- Calling the Super Constructor
03:49
32
4- Intermediate Function Inheritance
03:06
33
5- Method Overriding
03:30
34
6- Polymorphism
04:23
35
7- When to Use Inheritance
03:24
36
8- Mixins
05:54
37
10- Exercise Prototypical Inheritence
03:19
38
11- Solution Prototypical Inheritance
05:54
39
12- Exercise- Polymorphism
02:36
40
13- Solution- Polymorphism
05:12
41
1- ES6 Classes
05:42
42
2- Hoisting
03:47
43
3- Static Methods
04:18
44
4- The This Keyword
04:58
45
5- Private Members Using Symbols
07:49
46
Private Members Using WeakMaps
06:59
47
7- Getters and Setters
02:51
48
Inheritance
04:01
49
9- Method Riding
02:34
50
11- Exercise
03:26
51
12- Solution
04:21
52
1- Modules
03:43
53
2- CommonJS Modules
05:52
54
3- ES6 Modules
03:25
55
4- ES6 Tooling
01:27
56
5- Babel
07:12
57
6- Webpack
08:27
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Frequently asked questions

What are the prerequisites for this course?
Before enrolling in this course, you should have a basic understanding of JavaScript, including familiarity with variables, functions, and basic control structures. The lessons will build on these concepts to introduce object-oriented programming principles.
What will I build during this course?
Throughout the course, you will work on several practical exercises, one of which includes building a Stopwatch application. These exercises are designed to help you apply object-oriented programming concepts such as encapsulation, inheritance, and polymorphism in a real-world context.
Who is the target audience for this course?
This course is intended for JavaScript developers who want to deepen their understanding of object-oriented programming concepts. It is suitable for those who have a basic knowledge of JavaScript and are looking to apply OOP principles to enhance their coding skills.
How does this course compare to other JavaScript courses?
Unlike general JavaScript courses, this course focuses specifically on object-oriented programming. It covers topics such as prototypes, inheritance, and ES6 classes in detail, which are essential for mastering OOP in JavaScript.
What specific tools or platforms will be used in the course?
The course involves setting up a development environment where you will use modern JavaScript tools like Babel and Webpack. These tools will help you understand modules and ES6 features, which are crucial for modern JavaScript development.
What topics are not covered in this course?
This course does not cover advanced JavaScript topics outside the scope of object-oriented programming, such as asynchronous programming, JavaScript frameworks, or server-side JavaScript with Node.js.
How will the skills from this course carry over to other areas or careers?
The skills gained from understanding object-oriented programming in JavaScript are transferable to other programming languages that support OOP. This foundational knowledge can also enhance your ability to work with JavaScript frameworks and libraries that rely on OOP principles.