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Join Exercism’s JavaScript Track for access to 149 exercises grouped into 33 JavaScript Concepts, with automatic analysis of your code and personal mentoring, all 100% free.
export function hello() {
return 'Hello, World!';
};
Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.
Implement the `keep` and `discard` operation on collections. Given a collection and a predicate on the collection's elements, `keep` returns a new collection containing those elements where the predicate is true, while `discard` returns a new collection containing those elements where the predicate is false.
Exercism's classic introductory exercise. Just say "Hello, World!".
Write a function to solve alphametics puzzles.
Build web-pages, write backend, create database scripts, make mobile apps, design CLI-s, and more.
Use prototype-based, object-oriented, functional, or declarative programming styles, and more.
Dynamically and weakly typed by default, gain typed confidence using Flow, JSDoc, or TypeScript.
Async/await, dedicated workers, or state sync in shared workers. No deadlocks or race conditions.
No need to reinvent the wheel. Build on top of > 1.3 million packages (April, 2020).
Frequent updates, following ECMAScript, a general purpose, cross platform, vendor-neutral standard.
Every language has its own way of doing things. JavaScript is no different. Our mentors will help you learn to think like a JavaScript developer and how to write idiomatic code in JavaScript. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in JavaScript - they'll help you discover the things you don't know that you don't know.
Learn more about mentoring
The JavaScript track on Exercism has 33 concepts and 149 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.
See all JavaScript exercises
The best part, it’s 100% free for everyone.
