Mastering TypeScript - 2026 Edition (Udemy.com)
Learn the world's fastest growing programming language from scratch. Includes Webpack & React!
Created by: Colt Steele
Last updated June 2026
Our take
Based on the ratings of 7,410 students, a sample of their written reviews and the syllabus, as the course stood in June 2026. No course pays to be reviewed.
Colt Steele's TypeScript course is an 11-hour tour of the language for people who already write JavaScript and want to add types without wading through a framework first. The syllabus shows 151 lectures across 19 sections, starting with basic annotations and functions, then interfaces, the compiler, classes, generics and type narrowing, before closing with Webpack and a React section. It's pitched at complete TypeScript beginners, and the reviews agree: this is a first course, not a reference for advanced type gymnastics.
Students praise how plainly he explains things. Reviewers call the teaching clear, easy to follow and lightly funny, and one says other TypeScript courses covered the same ground in a more complicated form. The rating is 4.7 from about 7,400 reviews, with 95 percent at four or five stars. The complaints are consistent. There are no coding exercises and only 7 quizzes, and a 4-star reviewer says practice dries up in the harder later topics. Another misses mapped types and keyof. A 3-star review says the React and Webpack sections need refreshing, despite a June 2026 update, and one calls it chunks of knowledge, not a connected project.
Value is fine for a paid course this size, and it's a shorter, syntax-first alternative to the project-heavy React and Next.js course listed beside it. If the goal is to understand what the compiler is complaining about and read typed code with confidence, this does the job in a weekend or two. Pair it with a real project, because the course won't supply one, and expect to look up mapped types and keyof elsewhere.
Pros
- Explanations reviewers call clear, calm and lightly funny, easy to follow for JavaScript developers
- Goes past basic annotations into generics, type narrowing and type declarations
- Ends with Webpack and React setup, so the tooling side is not left as homework
- About 11 hours, short enough to finish; rated 4.7 from about 7,400 reviews
Cons
- No coding exercises and only 7 quizzes; reviewers say practice thins out in the harder later sections
- React and Webpack sections feel dated to some reviewers despite a June 2026 update
- Skips mapped types and keyof, and lessons feel like separate chunks rather than one project
Colt has an engaging way of teaching by using humour, a soft tone and provides in-depth detail in context with the lesson. I found this course easy to follow.
Beginner means new to TypeScript, not to programming; basic JavaScript experience is assumed.
What you will learn
- The ins and outs of ALL of TypeScript's syntax
- TypeScript Interfaces, Generics, Classes, Modules, and more
- Integrate TypeScript with Webpack
- Use TypeScript with ReactJS
Course content
19 sections · 151 lectures · 11 hours of video 7 quizzes, 11 articles
- 1Introduction 3 free previews6 lectures · 13 min
- 2Installation & Setup6 lectures · 14 min
- 3Type Annotation Basics 2 free previews6 lectures · 2 quizzes · 18 min
- 4Functions8 lectures · 2 quizzes · 27 min
- 5Object Types9 lectures · 1 quiz · 35 min
- 6Array Types4 lectures · 12 min
- 7Union Types5 lectures · 27 min
- 8Tuples and Enums6 lectures · 1 quiz · 25 min
- 9Interfaces8 lectures · 1 quiz · 26 min
- 10The TypeScript Compiler10 lectures · 33 min
- 11Mini Project: The DOM, Type Assertions, and More!12 lectures · 1.2 hours
- 12Classes10 lectures · 43 min
- 13TypeScript Classes10 lectures · 40 min
- 14Generics10 lectures · 48 min
- 15Type Narrowing8 lectures · 48 min
- 16Working With Type Declarations4 lectures · 30 min
- 17Modules7 lectures · 34 min
- 18Webpack & TypeScript9 lectures · 46 min
- 19React & TypeScript13 lectures · 59 min
Who it is for
The instructor says it suits
- Complete TypeScript Beginners
What you need before you start
- Basic JavaScript Experience
Course Description
Welcome to the best resource online for mastering TypeScript.
TypeScript is a powerful superset of JavaScript that makes development smoother, safer, and helps you catch errors and avoid bugs early on. TypeScript adds a bunch of useful features to the JavaScript that you know and love. It helps you be a more productive developer and forces you to write better code.
TypeScript has skyrocketed in popularity to become one of the world’s most popular and loved programming languages. It has doubled in popularity every year since 2017, and it continues to grow at an astronomical rate. It’s definitely the right time to learn TypeScript!
This course covers all the syntax, features, and concepts you need to master TypeScript and start using it in your own codebases. We start with the very basics of the type system and cover everything up to incorporating TypeScript in React codebases and using Webpack with TypeScript.
Here’s a detailed breakdown of the topics the course covers:
The TypeScript type system
Union Types
Intersection Types
Tuples and Enums
Interfaces
The TypeScript compiler and how to configure it
Working with the DOM and TypeScript
TypeScript Classes
Generics
Type Narrowing
Type Declarations
Working with 3rd party libraries
Webpack + TypeScript workflows
Integrating React and TypeScript
TypeScript’s Module System
Enroll in this course to learn what TypeScript is, why it’s so popular, and how to use it!
Instructor Details
- 4.7 Rating
7,410 Reviews
Colt Steele
Hi! I'm Colt. I'm a developer with a serious love for teaching. I've spent the last few years teaching people to program at 2 different immersive bootcamps where I've helped hundreds of people become web developers and change their lives. My graduates work at companies like Google, Salesforce, and Square.
Most recently, I led Galvanize's SF's 6 month immersive program as Lead Instructor and Curriculum Director. After graduating from my class, 94% of my students went on to receive full-time developer roles. I also worked at Udacity as a Senior Course Developer on the web development team where I got to reach thousands of students daily.
I’ve since focused my time on bringing my classroom teaching experience to an online environment. In 2016 I launched my Web Developer Bootcamp course, which has since gone on to become one of the best selling and top rated courses on Udemy. I was also voted Udemy’s Best New Instructor of 2016.
I've spent years figuring out the "formula" to teaching technical skills in a classroom environment, and I'm really excited to finally share my expertise with you. I can confidently say that my online courses are without a doubt the most comprehensive ones on the market.
Join me on this crazy adventure!
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Reviews
By Barbara Paulina Vazquez Trejo on 8/31/2026
De los 4 o 5 cursos que tengo del profesor, en todos cumple y supera mis expectativas, ya que su explicación es siempre clara, entretenida y aprendo bastante. Sabe combinar bien la teoría con ejercicios de codificación y proyectos, lo que me permite terminar el curso con el tema bien aprendido, solo me falta ponerlo en práctica y aplicarlo a mis propios proyectos.
By Mahjabin Alam on 8/25/2026
I have skimmed through some other courses on Typescript too. However, I realized quickly that I am getting the same thing in a complicated form. For someone who wants to start with Typescript, I recommend this course. When you want to start with React or some other framework, you will automatically learn the neety-greety on utilizing or setting up Typescript for those. No need to get the information encapsulated in usage wrapper.
By Usman Iqbal on 8/8/2026
This course is really good at providing the foundational knowledge in TypeScript. I like how it includes some more advanced topics, such as generics. It includes using Typescript for Classes and the basics of DOM manipulation & React. I personally didn't find the webpack section interesting, but it's good to have. The main downside was the lack of exercises/challenges in the later topics (which are also the more difficult topics). Practice is what consolidates knowledge and helps students to think for themselves.
By Daniel Gläsner on 5/29/2026
A solid introduction to the basics of TypeScript. However, the course feels more like separate chunks of knowledge rather than a connected learning path built around a real project. I would have liked to apply the concepts while building something practical.
By Richard Acquaye on 5/19/2026
I highly recommend this course. Colt has an engaging way of teaching by using humour, a soft tone and provides in-depth detail in context with the lesson. I found this course easy to follow.
By David McDonnell on 2/13/2026
Very easy to follow. well explained a lot of detail many snips identifying information sources about the subject. A very good refresher course. highly recommended.
By Morten Lejboelle on 1/10/2026
Great course focusing on the essentials of TS instead of trying to make a 50 hour course including everything in the world. Straight to the point explaining TS and strikes the balance well with explaining things quickly and accurately but don't overdo it in crazy detail such as other courses sometimes do and you are just waiting to move on.
By Anonymized User on 1/9/2026
Experienced and professional lecturer. I really enjoyed the short lectures and mixed with only few questions here and there. Great mix of coding examples that is adaptable and useful in real life. He has a good structure and nice extra material to look into. The only reason why it didn't get the top stars is because I found it a bit strong with the yellow/orange theme in the changing slides and some of the animations was not really to my taste. But that is a personal perspection. In the big whole, great course. Thank you!
By Lucas Hahne on 1/6/2026
That course really excells in teaching more than the fundamentals. I would always recommend it. The spead is great for everyone who already has a good understanding of Javascript and Typescript
By Alberto Saborio Gonzalez on 1/5/2026
I just wanna commend you on how good of a teacher you are. I never fully understood setters and getters. The explanaitions of previous videos I saw were not really clear. The way you explain it is consice and simple and I was able to really understand it in a couple of minutes. You are the best teacher i have found on Udemy so far!!
Quality Score
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Overall Score : 94 / 100












