When comparing Eloquent JavaScript - A Modern Introduction to Programming vs exercism.org, the Slant community recommends exercism.org for most people. In the question“What are the best resources to learn JavaScript?” exercism.org is ranked 3rd while Eloquent JavaScript - A Modern Introduction to Programming is ranked 6th. The most important reason people chose exercism.org is:
Rather than merely test for code correctness, Exercism uses peer review to improve general programming techniques. Users are encouraged to comment on others' solutions, and refine their own based on feedback.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Teaches programming fundamentals
This is a book on programming and the fact that programming happens to be in JavaScript is secondary.
Pro Free version available
An online version is available for free here.
Pro Easy to follow, conversational presentation style
The book is written in a friendly, conversational way and progresses in an easy to follow way.
Pro Online version has interactive exercises
Try them out directly in your browser.

Pro Human review and feedback
Rather than merely test for code correctness, Exercism uses peer review to improve general programming techniques. Users are encouraged to comment on others' solutions, and refine their own based on feedback.

Pro Practice with production tools
Unlike many code practice websites, Exercism requires the user to develop and test entirely offline, submitting only the finished code. This promotes familiarity with essential tools and workflow, not just the bare language.
Cons
Con Overkill for experienced programmers looking to learn JavaScript
This book is less useful to people that already are well versed in programming and just want to pick up another language to add to their portfolio as it covers a lot of fundamentals of programming that can be skipped by experienced programmers.
Con Requires fast learning in order to understand complex topics
From chapters one through five, the reader will find this book easy to follow and the topics and concepts steadily increase in complexity. However, once you enter the later chapters, you will require a more rounded understanding of the language and should certainly complement the book with other learning material.
Con Not a great place to start for those without programming experience
This book is a beneficial supplement to other learning material, or for those who have experience with another programming language. However those new to programming will likely find themselves struggling with the fast pace of Eloquent JavaScript and the difficult-to-follow examples.

Con Custom commandline client
Exercism requires using a CLI utility to fetch and submit exercises. This is inconvenient compared to web-only alternatives, and poses an additional barrier to entry for some users.
