CoffeeScript compiles to Javascript. Batman.js can most certainly be a Javascript framework and give examples in CoffeeScript. Many people prefer CoffeeScript for a variety of reasons, including readability.
Also, you aren't entitled to dictate instructions to other people who are giving you the benefit of their hard work. It's rude and obnoxious.
Maybe the guy you're replying to edited his post, but "If it's a JavaScript framework, please give code examples in JavaScript"--to me--reads as a rather polite request, rather than a dictum as you suggested.
Except for at the top of the example you pasted, and at the top of the documentation page, under "Introduction" in big letters, whe it says "batman.js is a framework for building rich single-page browser applications. It is written in CoffeeScript and its API is developed with CoffeeScript in mind, but of course you can use plain old JavaScript too."
The first version of Batman was written in plain Javascript, but Shopify has really been falling in love with CoffeeScript, so we decided to rewrite it before it was released.
Batman.coffee is more correct but sure doesn’t have the same ring to it…
Same problem as Spine."js", playing hide the salami. Most JS devs still think JS means ECMAScript. Call it what it is. Python packages compile to C but they don't call themselves names like "Django.C", that would be disingenuous and obnoxious
In fact, Python packages do not compile to C, so calling Django Django.C would expose a complete lack of understanding of Python. In fact, batman.js is closer to a Jinja template being named with a .html extension.
Sorry, my bad, but you can replace Python with some Scheme implementation or anything else that compiles to anything. The point was "compiles to" != "is".
CoffeeScript is not JavaScript. If it's a JavaScript framework, please give code examples in JavaScript.