## Server Files in Coffee-Script In order to create application files in coffee-script, you'll need to register the coffee-script extension: ```javascript require('coffee-script/register'); ``` You'll need to do this at any entry points for the app (e.g. the server.js file, mocha.opts, and gulp/grunt). It is recommended to leave the entry point of the app (server.js by default, specified as 'main' in package.json) as a javascript file, and then register coffee-script, and proceed with any coffee-requires. ## Client Files in Coffee-Script You can use the Coffeeify module to include Coffee files in your browser package. Use a build script like this: ```javascript // assuming you haven't done so already require('coffee-script/register'); var b = browserify({ basedir: appDir, extensions: ['.coffee'], //causes browserify to look for this extension debug: true }); b.transform('coffeeify'); //adds coffee compiler to the build pipeline b.require('./app.coffee', { expose: 'browser-app' }); //requiring your file will set the entry point boot.compileToBrowserify(appDir, b); var bundlePath = sandbox.resolve('browser-app-bundle.js'); //remember, the final result is still '.js' var out = fs.createWriteStream(bundlePath); b.bundle().pipe(out); ```