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

23 Mentors

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

9,734 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.

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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 Nadeem Shabir

Nadeem Shabir https://github.com/kiyanwang

Polyglot developer, loves programming, constantly learning!
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 André König

André König https://github.com/akoenig

I'm a sofware architect & engineer and I love to share knowledge, because I think that everybody should be able to learn how to develop software.
Avatar of Monica Calderaro

Monica Calderaro https://github.com/mccr

I'm a career changer (used to be a telecommunication Engineer), always up for learning new things and helping along the way.
Avatar of Alexandre Gomes

Alexandre Gomes https://github.com/gomesalexandre

Full-Stack JavaScript developer. Lover of all things JS, TS, React and GraphQL. I enjoy learning by doing, and helping others learn the same way.
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#.
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.

Prime Factors
medium
algorithms
control flow conditionals
control flow loops
integers
math
Food Chain
medium
algorithms
text formatting
Clock
medium
integers
logic
strings
Space Age
easy
classes
floating point numbers
Triangle
easy
control flow conditionals
control flow loops
exception handling
integers
House
medium
arrays
control flow conditionals
control flow loops
recursion
strings
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.

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