TypeScript

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

23 Mentors

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

9,740 Students

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

89 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

The reviews are incredibly helpful because they help me see things that I missed, learn about new ways and sometimes interesting discussions that can add a fun twist to maybe a simple problem.

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 Christoph Lipp

Christoph Lipp https://github.com/ser1us

I mainly use Typescript at work and I really appreciate the type safety it provides. Combine it with the awesome Visual Studio Code and you're in for a treat. Another well done language by Microsoft.
Avatar of Nadeem Shabir

Nadeem Shabir https://github.com/kiyanwang

Polyglot developer, loves programming, constantly learning!
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 Cedd Burge

Cedd Burge Blog Posts

I'm a software lead / architect / manager type thing and I have a strong focus on code quality. Typescript has an incredible type system, which helps confidence when refactoring, and allows the IDE (VS Code in my case) to provide more help. It's definitely a step up from Javascript for me, although other opinions are available.
Avatar of Vitor Fernandes

Vitor Fernandes https://github.com/vmlf01

I'm a fullstack developer working mostly with Node and Angular. I've been tracking TypeScript evolution since version 1.8 and I've used C# for most of my career, so I'm no stranger to types!
Avatar of Diego Colombo

Diego Colombo https://github.com/colombod

Using typescript professionally on projects, I love to network and help
Fun. Challenging. Interesting

Community-sourced TypeScript exercises

These are a few of the 89 exercises on the TypeScript track. You can see all the exercises here.

Largest Series Product
medium
control flow conditionals
control flow loops
exception handling
integers
regular expressions
strings
math
Leap
easy
booleans
integers
logic
Nucleotide Count
medium
arrays
control flow conditionals
control flow loops
strings
text formatting
Complex Numbers
medium
arrays
control flow conditionals
control flow loops
math
Prime Factors
medium
algorithms
control flow conditionals
control flow loops
integers
math
Strain
medium
algorithms
arrays
callbacks
control flow conditionals
control flow loops
filtering
lists
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.

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

Join the TypeScript Track