I'm very glad you posted your comment. It's a reasonable view and the one that I wanted to respond to.

To the author: I don't think you should rewrite this in JavaScript if you like CoffeeScript. I think you should write all of the examples in your README in CoffeeScript. I don't think you'll draw interest from people who aren't open to CoffeeScript, at least early on. Those who are already using CoffeeScript or are curious (I'm somewhere between the two) will prefer all the examples to be in CoffeeScript.

Besides that, there is some overhead in switching between reading the two languages. I was wondering why there were so many parens when I hit the first couple JavaScript examples.