Use browserify.

src/js/main.js

@@ -3,17 +3,7 @@
  */
 (function (factory) {
   'use strict';
-
-  if (typeof define === 'function' && define.amd) {
-    // AMD. Register as an anonymous module.
-    define(['jquery'], factory);
-  } else if (typeof exports === 'object') {
-    // Node/CommonJS
-    factory(require('jquery'));
-  } else {
-    // Browser globals
-    factory(jQuery);
-  }
+  factory(jQuery);
 })(function ($) {
   'use strict';