JavaScript

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JavaScript is a scripting language, primarily used for creating dynamic websites and programming web servers. It's a very popular language, and supports a variety of programming paradigms.
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Track mentors

110 Mentors

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

45,258 Students

Join thousands of students who have enjoyed learning and improving their skills by taking this track.
Track exercises

99 Exercises

Hundreds of hours have gone into making these exercises fun, useful, and challenging to help you enjoy learning.

About JavaScript

export function hello() {
  return 'Hello, World!';
};

ECMAScript is the standard that defines JavaScript, the language that allows web pages to be dynamic. It is an interpreted language, which means that it doesn't need to be compiled by the programmer: instead the client (such as a web browser) will parse the code and turn it into code that their machine can run - suitable for creating dynamic websites that can run on any browser on any computer!

In addition to use in web pages with modern web browsers, and it can also be executed on servers where the NodeJS platform is installed where it can be used for creating a web server too.

"ECMAScript has grown to be one of the world’s most widely used general purpose programming languages. It is best known as the language embedded in web browsers but has also been widely adopted for server and embedded applications." — ECMA International Language Specification

Starting with the 6th edition (commonly known as ES2015 or ES6) in 2015, a new edition of the standard will be released each year. The 6th edition was a major update which brought many enhancements over ES5, including notably template strings, expressive arrow function syntax, and cleaner syntax for defining classes.

However, support for the newest syntax is incomplete in current browsers and the latest node, and often requires transpilation with a tool like Babel.

Note: This track supports the latest ECMAScript syntax via Babel and the @babel/preset-env plugin, and new experimental features will be enabled with each release of the specification. Here, you will find code that not all runtimes are able to run.

Join the JavaScript 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 JavaScript Track mentors

Once you join the JavaScript 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 Oliver Radini

Oliver Radini Oliver Radini

I'm a Javascript developer. I've been working with Javascript for around 5 years now. I really love to help beginners learn to program, and show people what a great language javascript can be.
Avatar of June

June Website

I really like using JavaScript in the back-end. After a web development bootcamp I was working as Node.js developer for 2 years before switching to Go.
Avatar of Celestine Ekoh-Ordan

Celestine Ekoh-Ordan Personal Website

I am a full stack software developer with experience primarily in the JavaScript stack.
Avatar of Alfredo Alonso

Alfredo Alonso Website

I'm a Frontend Developer working on {{js_library_or_framework_used_nowadays}}. I love the idea behind Exercism and I really enjoy helping others to learn and I belive that also helps to keep pushing my own knowledge. Feel free to reach out!
Avatar of Koen Wellens

Koen Wellens My blog where I review books.

I've been working with JavaScript for about 6 years now. I think I've come at a level where I can help others.
Avatar of Shannon Tjoa

Shannon Tjoa https://github.com/shannontjoa

I love JavaScript for its dynamic nature. I have been using it for my professional work and personal projects
Fun. Challenging. Interesting

Community-sourced JavaScript exercises

These are a few of the 99 exercises on the JavaScript track. You can see all the exercises here.

Sieve
medium
integers
recursion
math
conditionals
loops
Wordy
medium
exception handling
parsing
pattern recognition
regular expressions
strings
conditionals
loops
Armstrong Numbers
easy
algorithms
math
Collatz Conjecture
easy
exception handling
integers
recursion
math
conditionals
loops
D&D Character
easy
classes
randomness
Transpose
easy
arrays
lists
loops
matrices
strings
text formatting
Passionate. Knowledgeable. Creative.

Meet the JavaScript Track maintainers

The JavaScript Maintainers are the brains behind the JavaScript 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 Tejas Bubane

Tejas Bubane My blog

Primarily a Ruby & Javascript coder, getting better at functional programming, emacs lover.
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.

Get started with the JavaScript track. As with everything on Exercism, it's 100% free!

Join the JavaScript Track