js模块加载方式浅析

(function(req) {
 window._Req= req;
})((function($) {
 var _factory = function() {}; //模块工厂
 //docker
 _factory.prototype = {
 _origin: location.origin || location.protocol + "//" + location.host,//域名地址
 _aim: null,
 _config: function(param) {
 var _default = { //默认参数
 _coreDir: "",
 _moduleArr: [
 ['', '']
 ], //模块数组
 },
 _opt = {};
 $.extend(_opt, _default);
 if (typeof param === 'object')
 $.extend(_opt, param);
 this._aim = _opt;
 this._load(); //加载模块
 },
 _load: function() {
 try {
 var _modules = this._aim._moduleArr,
 _core = this._aim._coreDir;
 _modules.forEach(function(_element) {
 _element.forEach(function(_ele) {
 var _index = _ele.lastIndexOf('.'), 
 _moduleType = _ele.substring(_index + 1), 
 _moduleDir = _core + '/' + _ele, 
 _module = null;
 switch (_moduleType) {
 case 'js':
 _module = document.createElement('script');
 _module.src = _moduleDir;
 break;
 case 'css':
 _module = document.createElement('link');
 _module.href = _moduleDir;
 _module.rel = 'stylesheet';
 break;
 default:
 console.error("对不起模块类型不匹配");
 break;
 }
 document.head.appendChild(_module); 
 });
 }, this);
 } catch (ex) {
 throw ex;
 }
 }
 };
 return new _factory(); //返回工厂
})(jQuery))

_Req._config({
 _coreDir: "../jq-package",
 _moduleArr: [
 ['js/ui-dialog.js', 'css/dialog.css']
 ], //模块数组
 });