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RxJS Crash Course - Reactivex From Zero to Hero (Udemy.com)

Prepare for RxJS with and without Angular. Learn RxJS skills and concepts.

4.7
90 reviews

Created by: Oleksandr Kocherhin

Last updated February 2026

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What you will learn

  • Be very well prepared for any RxJS usages you will have
  • Excel in a wide variety of RxJS possibilities
  • Strengthen you RxJS skills and your knowledge of important concepts
  • Learn the skills, concepts, and techniques of RxJS
  • Feel very confident in RxJS projects

How it compares

Against the other 815 rated Udemy courses in Web Development on CourseDuck:

  • Rating4.7 out of 5higher than 86% of them
  • Reviews90#670 of 816 by number of reviews
  • Length2.5 hoursshorter than 83% of them
  • Last updatedFebruary 2026more recently than 75% of them

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Course Description

This course is great preparation for any RxJS that you may have coming up. Reactive programming needs a lot amount of knowledge, but the best way to prepare for it is a lot of practice! In this course you will learn everything that come from real RxJS projects and reactive programming. There are no excersises that nobody asks here. In every video you will learn something useful that you will write every day. We will take a deep dive into the skills, concepts, and techniques that are required to solve each problem.

When you have completed this course you will have mastered RxJS on a high level and you will also have learned the concepts, skills, and techniques, like creating custom Observables and using things like caching or combining streams that are necessary for you to excel in any reactive programming. You will feel very confident working with RxJS in any project you will have. On top of all this, you will strengthen your reactive programming skills and RxJS fundamentals in overall.

Core topics of the course:

  • Observables and Observers

  • Converting JS data to observables

  • Mapping and filtering streams

  • Working with API

  • Combining streams

  • Working with RxJS subjects

  • Caching streams

  • Solving callback hell with observables
Read More All Levels All Levels product length iconTime: 2.5h

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Instructor Details

Oleksandr Kocherhin

I am a full-stack developer with a passion for learning and teaching what I know. I have been programming for around 10 years and teaching for almost 6 years.

I believe in learning through doing and this philosophy is present in every course that I teach. I love exploring new web & mobile technologies and my courses focus on giving you the edge in our fast-moving industry.

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Reviews

4.7

90 ratings on Udemy

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By Felipe Padovani on 5/15/2026

the teacher is excellent ! The content prepared is also good and straightforward. But I wish there were more exercises to do, exemple, for each 2 lessons 3 or 4 simple exercises just to practice what has been taught

By Fernando Miguel Carrasco Gris on 4/17/2026

Great course, very concise and quick. It helped me to understand some RxJS concepts that I never could.

By Felipe Ventura on 3/8/2026

This course is exactly what I needed! Oleksandr speaks with the confidence of someone who knows his stuff -- and, thankfully, who also knows how to teach it.

By Lovekesh Pal on 1/13/2026

Instructor's pace is really good. He teaches concepts in depth and this helps in imagining the real use cases.

By Rohit Nanania on 12/21/2025

Amazing, a quick crash course for rxjs. Content is pretty good. Explanation from author is very clear.

By Nicholas on 7/6/2025

Straight to the point and no fluff! Well explained and as an Angular dev who just wanted to take a refresher to ensure I wasn't missing anything, he hits every rxjs concept you need to know to be efficient with it.

By Endeavour on 7/4/2025

A tad short, but covers the basics

By Yasser Eltibili on 4/30/2025

very useful course to learn rxjs and learning rxjs with ANGULAR ! amazing course

By Raed Al-Husseini on 8/26/2024

Excellent instruction. Perhaps a tiny bit slower would be great, but just a tiny bit. Otherwise an easy 5 stars so far.

By Alisson Trindade Souza on 6/2/2024

I really enjoyed reviewing my RxJS knowledge with this course. I would like to recommend it for everyone who wants to learn RxJS, because it's full of details.

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Overall Score : 94 / 100

RxJS Crash Course - Reactivex From Zero to Hero
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  • Video Duration: icon 2.5h
  • Price: See price on Udemy
  • Provider: icon Udemy
  • Updated: icon February 2026
  • Level: All Levels All Levels
  • Language: icon English
  • Certificate: icon Yes
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