TypeScript

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TypeScript is a language for writing more maintainable JavaScript. TypeScript adds optional types, classes, and modules to JavaScript.
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Track mentors

22 Mentors

Our mentors are friendly, experienced TypeScript developers who will help teach you new techniques and tricks.
Track students

5,812 Students

Join thousands of students who have enjoyed learning and improving their skills by taking this track.
Track exercises

87 Exercises

Hundreds of hours have gone into making these exercises fun, useful, and challenging to help you enjoy learning.

About TypeScript

class HelloWorld {
  static hello(name = 'World') {
        return `Hello, ${name}!`
    }
}

export default HelloWorld

TypeScript (TS) is a superset of JavaScript (JS), created at Microsoft in response to frustration developing large-scale applictions in JS. In a large JS project, knowing what properties your own objects have, what arguments your functions take (and what type they need to be) can become difficult. Similarly, since there is no ability to intelligently inspect JS code, when you include a package (like from npm), you have to keep the documentation up so you know what methods are available and what arguments they take. TS solves these issues. It is currently an open-source project hosted on Github. It supports tools for any browser as well as Node, for any host, on any OS. TTS compiles to readable, standards-based JavaScript.

TS adds a flexible type system to JS, in addition to interfaces (custom types) and modifying the syntax of some ECMAScript features such as classes. Types are optional and flexible (for example, you can specify an argument is a string OR a number). Types allow tooling available in most code editors that improve the development experience such as code completion and method detection, both in your own code and in packages you use. It supports many upcoming ECMASCript features (such as async/await). TS can be written in OO or functional styles. It is compatible with all existing JS packages. TS transpiles to clean, readable JS.

Try it out at the playground, and stay up to date via the Typescript blog and Twitter account.

Join the TypeScript track

A tremendous learning opportunity to explore the depth of your own knowledge

Exercism is fantastic in learning new languages but that is not the extent of it. If you are a "more experienced" programmer you may have encountered impostor syndrome: the idea you don't really know what you think you know. Exercism lets you solve problems and put them in the space of open feedback which is a tremendous learning opportunity to explore the depth of your own knowledge. Even if you have been programming in a language for awhile it is worth checking into Exercism to see where you stand with current implementation practices.

Relaxed. Encouraging. Supportive.

Meet the TypeScript Track mentors

Once you join the TypeScript language track, you will receive support and feedback from our team of mentors. Here are the bios of a few of the mentors of this track.

Avatar of Derk-Jan Karrenbeld

Derk-Jan Karrenbeld https://github.com/SleeplessByte

Typings for JavaScript is what that language needed. Programming professionally with TypeScript for over 3 years.
Avatar of Filip Gulan

Filip Gulan GitHub

I am Frontend engineer in the telecommunication company. I work with Angular and Typescript on daily basis. I love to learn and also teach.
Avatar of Yash Kulshrestha

Yash Kulshrestha https://github.com/YashdalfTheGray

I got introduced to Typescript through the Angular 2 alpha and since then, I've been using it for projects at and outside of work. I'm a huge fan of the typing system and miss it when I'm working in other languages.
Avatar of Brian Douglas

Brian Douglas hard-coded.com

Irish software engineer. Focused on the web platform.
Avatar of Aleksander Heintz

Aleksander Heintz My blog

I love programming, and do it both professionally and as a hobby. At work I do most javascript and typescript, but I've also done a lot of F# and C#.
Avatar of Archana Sriram

Archana Sriram https://github.com/archanid

JavaScript and Node.js are my top programming languages. I can't imagine writing them without TypeScript. I'm a professional software engineer with over two decades of work experience. I love to teach and mentor.
Fun. Challenging. Interesting

Community-sourced TypeScript exercises

These are a few of the 87 exercises on the TypeScript track. You can see all the exercises here.

Perfect Numbers
easy
arrays
control flow conditionals
control flow loops
integers
math
Robot Simulator
medium
control flow conditionals
control flow loops
exception handling
games
parsing
strings
Atbash Cipher
medium
algorithms
arrays
control flow conditionals
control flow loops
text formatting
Scrabble Score
medium
control flow conditionals
control flow loops
maps
strings
Prime Factors
medium
algorithms
control flow conditionals
control flow loops
integers
math
Rotational Cipher
medium
ascii
iterators
Passionate. Knowledgeable. Creative.

Meet the TypeScript Track maintainers

The TypeScript Maintainers are the brains behind the TypeScript Track. They spend their spare time creating interesting and challenging exercises that we can all learn from. We are incredibly grateful for their hard work. Here are the bios of a few of the maintainers of this track.

Avatar of Cristian Rivas Gómez

Cristian Rivas Gómez

I am a Software Engineering student from San Sebastian. I enjoy a lot reading about topics related to Java, software maintainability and web technologies. My love for TypeScript began developing web apps with Angular framework.
Avatar of Derk-Jan Karrenbeld

Derk-Jan Karrenbeld My website

All-round programmer, manager and owner of a Dutch software agency specializing in bespoke and tailored code.
Avatar of Dave Sudia

Dave Sudia

I'm a career-changer from education, and I used Exercism to reinforce my skills as I made the switch. I love TypeScript for the flexibility of JS with the consistency of strongly typed languages. Maintaining the TS track has grown my appreciation for the language.

Get started with the TypeScript track. As with everything on Exercism, it's 100% free!

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