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

5,641 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 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.
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 Nadeem Shabir

Nadeem Shabir https://github.com/kiyanwang

Polyglot developer, loves programming, constantly learning!
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 Brian Douglas

Brian Douglas hard-coded.com

Irish software engineer. Focused on the web platform.
Avatar of Brenton Alker

Brenton Alker https://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.

Prime Factors
medium
algorithms
control flow conditionals
control flow loops
integers
math
Queen Attack
hard
control flow conditionals
control flow loops
equality
exception handling
optional values
parsing
text formatting
Clock
medium
integers
logic
strings
Accumulate
medium
algorithms
callbacks
control flow conditionals
lists
Roman Numerals
easy
control flow conditionals
control flow loops
pattern recognition
transforming
Variable Length Quantity
medium
algorithms
arrays
bitwise operations
control flow conditionals
control flow loops
exception handling
lists
loops
transforming
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 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 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!

Join the TypeScript Track