https://vnews24.it/wp-content/plugins/instagram-widget-by-wpzoom/js/instagram-widget.js

1jQuery(function($) {
2    var ticking = false;
3
4    $.fn.zoomInstagramWidget = function () {
5        return $(this).each(function () {
6            var $list = $(this);
7
8            var minItemsPerRow   = $list.data('images-per-row');
9            var desiredItemWidth = $list.data('image-width');
10            var itemSpacing      = $list.data('image-spacing');
11            var imageLazyLoading = $list.data('image-lazy-loading');
12
13            var containerWidth = $list.width();
14
15            var fitPerRow;
16            var itemWidth;
17
18            if (containerWidth / desiredItemWidth < minItemsPerRow) {
19                fitPerRow = minItemsPerRow;
20                itemWidth = Math.floor((containerWidth - 1 - (minItemsPerRow - 1) * itemSpacing) / minItemsPerRow);
21            } else {
22                fitPerRow = Math.floor((containerWidth - 1) / desiredItemWidth);
23                itemWidth = Math.floor((containerWidth - 1 - (fitPerRow - 1) * itemSpacing) / fitPerRow);
24            }
25
26            $list.find('li').each(function(i) {
27                if ( ++i % fitPerRow == 0 ) {
28                    $(this).css('margin-right', '0');
29                } else {
30                    $(this).css('margin-right', itemSpacing + 'px');
31                    $(this).css('margin-bottom', itemSpacing + 'px');
32                }
33            });
34
35            $list.find('a.zoom-instagram-link').css({
36                width: itemWidth,
37                height: itemWidth
38            });
39
40            if (imageLazyLoading) {
41                $list.find('a.zoom-instagram-link').lazy();
42            }
43
44            $list.removeClass('zoom-instagram-widget__items--no-js');
45        });
46    };
47
48    function requestTick() {
49        if (!ticking) {
50            ticking = true;
51            requestAnimationFrame()(update);
52        }
53    }
54
55    function requestAnimationFrame() {
56        return  window.requestAnimationFrame       ||
57                window.webkitRequestAnimationFrame ||
58                window.mozRequestAnimationFrame    ||
59                function (callback){
60                    window.setTimeout(callback, 1000 / 60);
61                };
62    }
63
64    function update() {
65        $('.zoom-instagram-widget__items').zoomInstagramWidget();
66        ticking = false;
67    }
68
69    $(window).on('resize orientationchange', requestTick);
70    requestTick();
71});