https://i.compasspub.com/kor/front/js/jquery.multiDownload.js

1(function ($) {
2
3    var methods = {
4        _download: function (options) {
5            var triggerDelay = (options && options.delay) || 100;
6            var cleaningDelay = (options && options.cleaningDelay) || 1000;
7
8            this.each(function (index, item) {
9                methods._createIFrame(item, index * triggerDelay, cleaningDelay);
10            });
11            return this;
12        },
13
14        _createIFrame: function (item, triggerDelay, cleaningDelay) {
15            setTimeout(function () {
16                var frame = $('<iframe style="display: none;" class="multi-download-frame"></iframe>');
17                frame.attr('src', $(item).attr('href') || $(item).attr('src'));
18                $(item).after(frame);
19                setTimeout(function () { frame.remove(); }, cleaningDelay);
20            }, triggerDelay);
21        }
22    };
23
24    $.fn.multiDownload = function(options) {
25        return methods._download.apply(this, arguments);
26    };
27
28})(jQuery);