I really wish Coffeescript frameworks would stop calling themselves Javascript. Why not Chocolate.coffee instead?
Why can't they just be separate languages? Stop mixing them up. You don't see Dart and JavaScript getting mixed up.
Whether or not a library happens to be written in CoffeeScript is immaterial to your use of it as a JavaScript developer. Now, if the docs aren't good enough because they don't cater to your preferred language reading choices, then that's a legit beef, and it's a documentation deficiency that should be fixed. No need for knee-jerk "dislike".
I propose that CoffeeScript is a language, complete and separate from JavaScript and that people start treating it as such so people who prefer readability over less typing don't have to deal with it if they don't want to.