You Don't Know JS: Up and Going

In depth books on JavaScript, very good content and well written. Would highly recommend for anyone that wants to get a strong understanding of how JavaScript works.

I am a beginner but I find the series quite good to get into I am on the third book. So, 3 of the first books are good so far. But, maybe it depends on your learning style.

You Don't Know JS is an incredible book series, and I highly recommend it if you want to deeply understand JavaScript. However, I don't think it's a great resource for beginners, simply because there aren't many exercises, and it explores the language in depth right out of the gate. In order to really appreciate what the book is doing, I think you need to have some prior experience working with JavaScript.

Its an amazing series of books but if you are a total beginner I would recommend you to take some basic Javascript course first because it wont be easy to understand that books if you have no fundamentals. Also practicing your course knowledge can be helpful.

As a first book on JavaScript, it is everything that I thought it could be: concise, tightly written, absolutely disciplined, and devoid of the dead-tree filler found in much thicker programming books. I cannot recommend this series highly enough for anyone interested in JS. Instead of learning just enough to be dangerous, if you work through this series (preferably open in your browser of choice while writing and running all the code examples in your Developer Tools console), you should emerge with an understanding of closures, coercion, scope, hoisting, and the this identifier.

It's a nice introdution to Javascript. The only bad thing about the book is the fact that the author recommends using comments in the code to get it well explained/documented (he says comments should tell why and not what but it's not what it's shown in code!)

In general, this was a good introduction to both JavaScript and what will be covered in the other books in the 'You Don't Know JS' series. Thank you to the author (Kyle) for dedicating their time to writing these on a relatively small budget (if the Kickstarter is anything to go by), and for making these free to read on GitHub (great for those who want to learn how to code, but can't afford to).Unfortunately, I take issue with some of the language used in this book.- but JS developers seem to stand out from the crowd in the sense of typically not learning very much of the language- Terribly mistaken.- just keep following what the crowd say

This book seems to me too simple for other programmers trying to get into JS and too difficult for beginners. I feel like it's trying to be a happy medium between the two.

It seems I really don't know the JS. The book is not just reference book for ES6, it also explains the why the feature exists and the common pitfalls when using them. I will need to read some parts again to understand better.

Fantastic series. Explains everything within JS, and not just the good parts ). Being able to most efficiently utilize a tool requires a good understanding of the underlying technology. This series does a good job at explaining just that, in a very quick manner.

I used the books before I knew anything about JS and found them really helpful.I especially liked the fact that the books cover quite a lot of not-so-popular features of Javascript and suggest an alternative programming paradigm when working with JS.

Read it, and I'm not a fan. The author is too in love with Javascript he focuses too much on language details and not enough on using it effectively.