Hey guys - Addy (author of this mini-book here). Although the current edition is very much targeted at beginners, I'm working on a significantly more detailed version this summer which will also be released for free.

To those who have mentioned some patterns are indeed better suited to 'classical' programming languages, I completely agree with you - the reason I've included a mention of them is so that developers who may not have read the book by GoF get a little historic exposure to why those patterns were defined and where they fit in.

There will be a lot more JavaScript-centric content in the next version with a little less focus on the traditional patterns.