Example code style I use of a Node.js module. Uses @felixge's Node Style Guide and some more conventions on naming and formatting.

articles.js

//
// Articles controller
//  Optional module description line.
//

'use strict';

var fs   = require('fs');
var path = require('path');

var Articles = require('./models/articles');
var Comments = require('./models/comments');

// Expose module
module.exports.index   = indexAction;
module.exports.archive = archiveAction;

// Renders the latest articles
function indexAction(req, res) {
  _render(res, 'index', Articles.getLatest());
}

// Renders the archive, articles older than a year
function archiveAction(req, res) {
  _render(res, 'archive', Articles.getArchive());
}

// Render view
function _render(res, file, articles) {
  res.render('articles/' + file + '.html', {
    articles: articles
  });
}