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

17 Mentors

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

3,783 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.

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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 Matt Helliwell

Matt Helliwell https://github.com/matthelliwell2

I'm a senior developer at a UK software house, currently working on microservices and front-ends in Typescript
Avatar of Randall Koutnik

Randall Koutnik blog

Level 13 JavaScript Wizard
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 Brenton Alker

Brenton Alker github.com/tekerson

As a believer in the communicative power of type systems, I think TypeScript has an opportunity to bring lessons learned in other communities to the world of front-end web development.
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.

Run Length Encoding

easy
control flow conditionals
exception handling
parsing
pattern recognition
regular expressions
strings
text formatting

Nucleotide Count

medium
arrays
control flow conditionals
control flow loops
strings
text formatting

Collatz Conjecture

medium
conditionals
exception handling
integers
recursion
math

Diamond

medium
arrays
control flow conditionals
control flow loops
exception handling
games
parsing
text formatting

Robot Name

medium
control flow conditionals
exception handling
randomness
regular expressions
sets

Connect

medium
arrays
control flow conditionals
control flow loops
games
maps
parsing
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 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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