But there are other problems with the comment.
There's no mention of CoffeeScript anywhere
It's in the 2nd paragraph of the docs. Not prominent, but somewhere.
CoffeeScript is not JavaScript
Technically true, I suppose, but they are beyond related.
If it's a JavaScript framework
Maybe it's a CoffeeScript framework? My sense is that at the very least, the use of CoffeeScript is an important aspect of the project.