https://www.archspace.cz/themes/archspace/js/transformParallaxFluid.js?v=230329163654

1(function ($) {
2
3    $.fn.transformParallaxFluid = function (options) {
4
5        $(this).each(function () {
6
7
8            var settings = $.extend({
9                speed: 1.2, // 1 = default page speed, parallax is ignored
10                offset: 0,
11                axis: "y",
12                breakpoint: 990
13            }, options);
14
15            var isX = (settings.axis == "x");
16
17            var $that = $(this);
18
19            var visibleAt = $that.offset().top - $(window).height();
20            if (visibleAt < 0) {
21                visibleAt = 0;
22            }
23
24            var currentVal = 0;
25            var destinationVal = 0;
26
27            var reposition = function () {
28
29                var width = $(window).width();
30                if (window.matchMedia("(min-width: " + settings.breakpoint + "px)").matches) {
31                    var wtop = $(window).scrollTop();
32                    if (wtop >= visibleAt) {
33
34                        var seeing = wtop - visibleAt;
35                        var val = seeing * (1 - settings.speed);
36                        destinationVal = val - settings.offset;
37                    }
38                } else {
39                    $that.css("transform", "");
40                }
41            };
42
43
44            var redraw = function () {
45                var diff = currentVal - destinationVal;
46                if (diff > 1 || diff < -1) {
47                    currentVal -= diff / 12;
48
49                    if (isX) {
50                        $that[0].style.transform = "translate3d(" + (currentVal) + "px, 0, 0)";
51                    } else {
52                        $that[0].style.transform = "translate3d(0, " + (-currentVal) + "px, 0)";
53                    }
54                } else {
55                    if (currentVal != destinationVal) {
56                        if (isX) {
57                            $that[0].style.transform = "translate3d(" + (destinationVal) + "px, 0, 0)";
58                        } else {
59                            $that[0].style.transform = "translate3d(0, " + (-destinationVal) + "px, 0)";
60                        }
61                        currentVal = destinationVal;
62                        $(window).trigger("scroll");
63                    }
64                }
65
66                window.requestAnimationFrame(redraw);
67            };
68
69
70            window.requestAnimationFrame(redraw);
71
72            setTimeout(reposition, 1);
73            $(window).on("scroll resize", reposition);
74            reposition();
75        });
76    };
77}(jQuery));