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

24 Mentors

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

11,954 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

Exercism is a great website where I was able to have some very interesting challenges.

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 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 Randall Koutnik

Randall Koutnik blog

Level 13 JavaScript Wizard
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 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#.
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.
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.

Flatten Array
medium
arrays
lists
loops
recursion
Queen Attack
hard
control flow conditionals
control flow loops
equality
exception handling
optional values
parsing
text formatting
Rectangles
medium
arrays
control flow conditionals
control flow loops
matrices
strings
OCR Numbers
medium
control flow conditionals
control flow loops
equality
exception handling
integers
parsing
text formatting
Anagram
easy
filtering
strings
Allergies
medium
arrays
bitwise operations
control flow conditionals
control flow loops
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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