https://www.rionesanpaolo-asti.it/wp-content/plugins/wp-snow-effect/public/js/jsnow.js?ver=1.5

1(function ($) {
2    $.fn.jSnow = function (h) {
3        var j = $.extend({}, $.fn.jSnow.defaults, h);
4        var k, WIN_HEIGHT;
5        var l = j.flakes;
6        var m = j.flakeCode;
7        var n = j.flakeColor;
8        var o = j.flakeMinSize;
9        var p = j.flakeMaxSize;
10        var q = j.fallingSpeedMin;
11        var r = j.fallingSpeedMax;
12        var s = j.interval;
13        var t = j.zIndex;
14        var vs = j.vSize;
15        var fa = j.fadeAway;
16        var fs = j.followScroll;
17        setWaH();
18        var useGif = false;
19        //if ($.browser.msie && (parseFloat($.browser.version) < 8))useGif = true;
20        if ($('body').is('.lt-ie8 *')) {
21            useGif = true;
22        }
23        //if ($.browser.msie && (parseFloat($.browser.version) < 8) && t == "auto")t = 0;
24        if ($('body').is('.lt-ie8 *') && t == "auto")t = 0;
25
26        var u = $("<div \/>");
27        u.css({
28            width: k + "px",
29            height: 1,
30            display: "block",
31            overflow: "visible",
32            position: "absolute",
33            left: "1px",
34            zIndex: t
35        });
36        if (fs) {
37            u.css('top', $("html").scrollTop() + 1 + "px");
38        } else {
39            u.css = '1px';
40        }
41        $("body").prepend(u).css({height: "100%"});
42        $("html").css({"overflow-y": "scroll", "overflow-x": "hidden"});
43        var v = Array();
44        generateFlake(l, false);
45        setInterval(animateFlakes, s);
46        window.onresize = setWaH;
47        function setWaH() {
48            k = $('body').width();
49            var def_h = window.innerHeight || document.documentElement.clientHeight;
50            def_h -= 50;
51            if (!vs || vs > def_h ) {
52                WIN_HEIGHT = window.innerHeight || document.documentElement.clientHeight
53                WIN_HEIGHT -= 50;
54            } else WIN_HEIGHT = vs;
55        };
56        if (fs) {
57            window.onscroll = function () {
58                u.css({top: $("html").scrollTop() + "px"})
59            };
60        }
61        function generateFlake(a, b) {
62            a = a || 1;
63            b = b || false;
64            var i = 0;
65            for (i = 0; i < a; i++) {
66                var c = $("<span \/>");
67                var d = o + Math.floor(Math.random() * p);
68                var e = m[Math.floor(Math.random() * m.length)];
69                if (e.indexOf(".gif") != -1 || e.indexOf(".png") != -1) {
70                    var f = new Image();
71                    if (useGif)e = e.replace("png", "gif");
72                    f.src = e;
73                    e = "<img src='" + e + "' alt='jSnowFlake'>"
74                }
75                c.html(e).css({
76                    color: n[Math.floor(Math.random() * n.length)],
77                    fontSize: d + "px",
78                    display: "block",
79                    position: "absolute",
80                    cursor: "default",
81                    "pointer-events": "none",
82                    "z-index": t
83                });
84                $(u).append(c);
85                f_left = Math.floor(Math.random() * (k - c.width() - 50)) + 25;
86                f_top = (b) ? -1 * c.height() : Math.floor(Math.random() * (WIN_HEIGHT - 50));
87                var g = Math.floor(Math.random() * 90);
88                jQuery.data(c, "posData", {
89                    top: f_top,
90                    left: f_left,
91                    rad: Math.random() * 50,
92                    i: Math.ceil(q + Math.random() * (r - q)),
93                    swingRange: g
94                });
95                c.css({top: f_top + "px", left: f_left + "px"});
96                v.push(c)
97            }
98        };
99        function animateFlakes() {
100            var i = 0;
101            for (i = v.length - 1; i >= 0; i--) {
102                var f = v[i];
103                var a = jQuery.data(f, "posData");
104                a.top += a.i;
105                var b = Number();
106                b = Math.cos((a.rad / 180) * Math.PI);
107                a.rad += 2;
108                var X = a.left - b * a.swingRange;
109                if (fa) {
110                    op = (WIN_HEIGHT - a.top < 100) ? ((WIN_HEIGHT - a.top) / 100) : 1;

111                    f.css('opacity', op);
112                }
113                f.css({top: a.top + "px", left: X + "px"});
114                if (a.top > WIN_HEIGHT) {
115                    jQuery.removeData(f);
116                    f.remove();
117                    v.splice(i, 1);
118                    generateFlake(1, true)
119                }
120            }
121        };
122        return this
123    };
124    $.fn.jSnow.defaults = {
125        flakes: 30,
126        fallingSpeedMin: 1,
127        fallingSpeedMax: 3,
128        flakeMaxSize: 20,
129        flakeMinSize: 10,
130        flakeCode: ["•"],
131        flakeColor: ["#fff"],
132        zIndex: "auto",
133        interval: 50,
134        fadeAway: true,
135    }
136})(jQuery);