https://www.milujsvujzivot.eu/js/masonry/js/masonry.filter.js

1/* -- Filter Plugin -- */
2(function ($) {
3    'use strict';
4    $.fn.masonryFilter = function (options) {
5        //reload masonry
6        var reload = function ($container) {
7            setTimeout(function () {
8                $container.masonry("layout");
9            }, 100);
10        };
11
12        var process = function ($container) {
13            var items = $container.masonry("getAllItems"),
14                revealItems = [],
15                hideItems = [];
16
17            $.each(items, function(i) {
18                var item = items[i];
19                var elm = $(item.element),
20                    shouldShow = options.filter && options.filter.call(elm);
21
22                if (shouldShow) {
23                    if (item.isHidden) {
24                        // -- Have to set this property so masonry does
25                        //    not include hidden items when calling "layout"
26                        item.isIgnored = false;
27                        revealItems.push(item);
28                    }
29                } else {
30                    if (!item.isHidden) {                        
31                        // -- Easier to set this property directy rather than
32                        //    using the "ignore" method, as it takes in a DOM
33                        //    element rather than the masonry item object.
34                        item.isIgnored = true;
35                        hideItems.push(item);
36                    }
37                }
38            });
39
40            $container.masonry('hide', hideItems);
41            $container.masonry('reveal', revealItems);
42
43            reload($container);
44        };
45
46        return this.each(function () {
47            var self = $(this);
48            process(self);
49        });
50    };
51}(window.jQuery));