‫معرفی کتابخانه Loader برای بارگذاری JS و CSS

loader.load([
  'plugin/dropdowntree/css/style.min.css',  
  'plugin/dropdowntree/js/jstree.js',  
  'plugin/dropdowntree/js/jstree.checkbox.js',  
]).promise(function () {
  // run this code promise  
});

/*     
    loader version 0.2.1 2015    
    loader design by Behnam Mohammadi (http://itten.ir)
*/
window.loader = {  
    load: function (urls) {
        var loadCounter = 0;
        var promise = null;
        var ext = '';
        this.promise = function (fun) {
            promise = fun;
        };
        for (var i = 0; i < urls.length; i++) {
            ext = urls[i].substring(urls[i].length - 3);
            if (ext == '.js') {
                var script = document.createElement('script');
                script.src = urls[i];
                script.onload = function () {
                    loadCounter += 1;
                    if (loadCounter == urls.length) {
                        promise();
                    }
                };
                document.body.appendChild(script);
            } else if (ext == 'css') {
                var link = document.createElement('link');
                link.href = urls[i];
                link.rel = 'stylesheet';
                link.type = 'text\css';
                link.onload = function () {
                    loadCounter += 1;
                    if (loadCounter == urls.length) {
                        promise();
                    }
                };
                document.body.appendChild(link);
            }
        }
        return this;
    }
}