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

13,148 Students

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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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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 Cody Hoover

Cody Hoover https://github.com/hoovercj

I got started using typescript to write VS Code extensions such as Power Mode. I now mentor use it daily in my role as a front-end developer and mentor others on my team as we migrate more and more of our codebase to typescript.
Avatar of Noam Ben Shabat

Noam Ben Shabat GitHub

Full stack developer. Love typescript. Learned and still learning typescript and whould be happy to share my knowledge with others.
Avatar of Nadeem Shabir

Nadeem Shabir https://github.com/kiyanwang

Polyglot developer, loves programming, constantly learning!
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 Randall Koutnik

Randall Koutnik blog

Level 13 JavaScript Wizard
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.
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.

Roman Numerals
easy
control flow conditionals
control flow loops
pattern recognition
transforming
Pig Latin
medium
control flow conditionals
control flow loops
games
regular expressions
strings
transforming
Pascal's Triangle
medium
control flow conditionals
control flow loops
math
Binary Search Tree
medium
algorithms
control flow conditionals
control flow loops
recursion
Bob
easy
control flow conditionals
pattern recognition
polymorphism
regular expressions
strings
unicode
Anagram
easy
filtering
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 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.

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