模块化

module-header.js

/* global module, define,*/
;(function (root, factory) {
  'use strict'

  if (typeof module === 'object' && typeof module.exports === 'object') {
    /**
     * @type {{then:function}}
     */
    module.exports = factory()
  } else if (typeof define === 'function' && define.amd) {
    define([], factory)
  } else {
    root.Thenjs = factory()
  }
}(typeof window === 'object' ? window : this, function () {

});