intro.js

;(function (id, name, context, definition) {

  // --------------------------------------------------------------------------
  // Dependencies
  //
  // This is an attempt to make this library compatible with multiple module
  // formats. Other UMD implementations do not take into account dependencies:
  // Example: https://github.com/ForbesLindesay/umd/blob/master/template.js
  //
  // **NOTE: Named AMD modules are more suitable for libraries as it provides
  // a consistent naming convention to access it by (anonymous AMD modules are
  // better suited on an app level where files/paths may be changed).
  // --------------------------------------------------------------------------
  var deps = [];

  // CommonJS
  if (typeof module !== 'undefined' && module.exports) {
    for (var i = 0, l = deps.length; i < l; i++) {
      deps[i] = require(deps[i])
    };

    module.exports = definition.apply(context, deps);

  // AMD
  } else if (typeof define === 'function' && define.amd) {
    define(id, deps, definition);

  // STANDARD
  } else {
    context[name] = definition.apply(context, deps);
  }

})('amdName', 'contextName', this, function () {