Learn JavaScript

Learn JavaScript is an interactive online course that teaches modern JavaScript (ES2015+) through short lessons, coding challenges, and practical projects. You read concise lessons and write code directly in your browser, with immediate feedback on your solutions. The course includes a test-driven environment where you can practice concepts immediately after learning them, and compare your solutions with official answers.

The course stands out through its project-based approach with 17 real-world inspired projects like building a gem run game, implementing form validation, working with APIs like GitHub and currency conversion, and creating a food tracker app. It also includes a separate flashcards app that uses spaced repetition to help reinforce concepts. The entire learning experience happens in-browser with no setup required, and your progress syncs across devices.

This course is ideal for beginner developers who have basic programming experience in any language and want to learn JavaScript specifically. It's perfect for self-taught programmers, career switchers, or students who prefer hands-on learning over video tutorials. The free tier includes the first 77 lessons and 7 chapters, making it easy to try before committing to the one-time payment for full access.