jashkenas--coffeescript/documentation/sections/comments.md

Comments

In CoffeeScript, comments are denoted by the # character. Everything from a # to the end of the line is ignored by the compiler, and will be excluded from the JavaScript output.

codeFor('comment')

Sometimes you’d like to pass a block comment through to the generated JavaScript. For example, when you need to embed a licensing header at the top of a file. Block comments, which mirror the syntax for block strings, are preserved in the generated output.

codeFor('block_comment')