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

"text/coffeescript" Script Tags

While it’s not recommended for serious use, CoffeeScripts may be included directly within the browser using <script type="text/coffeescript"> tags. The source includes a compressed and minified version of the compiler ([Download current version here, 51k when gzipped](/v<%= majorVersion %>/browser-compiler/coffeescript.js)) as docs/v<%= majorVersion %>/browser-compiler/coffeescript.js. Include this file on a page with inline CoffeeScript tags, and it will compile and evaluate them in order.

The usual caveats about CoffeeScript apply — your inline scripts will run within a closure wrapper, so if you want to expose global variables or functions, attach them to the window object.