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

19 Mentors

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

4,682 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

Exercism is a great website

What I like about it is that I am able to solve the challenges in a TDD way working in a environment that I am familiar (my own PC not a browser IDE) and the cherry on the top of the cake is that I have access to code reviews.

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 Cody Hoover

Cody Hoover https://github.com/hoovercj

I got started using typescript to write VS Code extensions such as Power Mode. I now mentor use it daily in my role as a front-end developer and mentor others on my team as we migrate more and more of our codebase to typescript.
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 Randall Koutnik

Randall Koutnik blog

Level 13 JavaScript Wizard
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 Brian Douglas

Brian Douglas hard-coded.com

Irish software engineer. Focused on the web platform.
Avatar of Giorgio Delgado

Giorgio Delgado Personal Site

I'm a full-stack developer interested in functional programming and statically-typed languages. The geek in me thinks that the world needs more Elm.
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.

Hamming
easy
control flow conditionals
control flow loops
equality
strings
Alphametics
medium
algorithms
games
Allergies
medium
arrays
bitwise operations
control flow conditionals
control flow loops
Difference Of Squares
easy
algorithms
control flow loops
integers
math
Twelve Days
medium
control flow conditionals
control flow loops
pattern recognition
polymorphism
strings
Pascal's Triangle
medium
control flow conditionals
control flow loops
math
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 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.
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.

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