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Join Exercism’s JavaScript Track for access to 152 exercises grouped into 35 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.
Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for positive integers.
Parse and evaluate simple math word problems returning the answer as an integer.
Learn how to handle errors by creating a piece of software for a newspaper factory.
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 35 concepts and 152 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.
