软件下载多个对象转载

$(body).on(click, "#Download",function(){//单击下载按钮
    let triggerDelay = 100;
    let removeDelay = 1000;
    let url_arr=[];
    //多个file文件选择checkbox
    $(input[name="filePath"]:checked).each(function(){
        url_arr.push($(this).val());//取到下载url
    });
    url_arr.forEach(function(item,index){
        _createIFrame(item, index * triggerDelay, removeDelay);
    })
    function _createIFrame(url, triggerDelay, removeDelay) {
        //动态添加iframe，设置src然后删除
        setTimeout(function() {
            var frame = $();
            frame.attr(src, url);
            $(document.body).after(frame);
            setTimeout(function() {
                frame.remove();
            }, removeDelay);
        }, triggerDelay);
    }
  }