It's not recommended for serious use because: * You have to include the "coffee-script.js" compiler file, which is medium large (mostly the generated parse tab

It's not recommended for serious use because: * You have to include the "coffee-script.js" compiler file, which is medium large (mostly the generated parse table). * It's harder to debug, because you're debugging through an eval(), without the compiled JavaScript handy. Those two caveats aside, it works fine. All of the interactions on the CoffeeScript.org homepage are powered by it.