cjs-module-example.js

'use strict';

// Define reusable utils, outside of exported function body
var someUtilA = function () {
  /* ... */
};
var someUtilB = function () {
  /* ... */
};

// Export main function
module.exports = function (a, b, c) {
  /* ... */
  var d = someUtilA(a, b);
  /* ... */
  return result;
};