https://www.secunet.com/typo3temp/scriptmerger/compressed/Function…-2dd3de35c3804c5f2a51e1aa8da07d4c.min.gz.js

1// SCROLLING
2var windowWidth = 0;
3var html = document.documentElement;
4var body = document.body;
5var scroller = {
6    ease: 0.02, // <= scroll speed
7    endY: 0,
8    y: 0,
9    resizeRequest: 1,
10    scrollRequest: 0,
11};
12var requestId = null;
13$(document).ready(function() {
14    windowWidth = $(window).width();
15});
16
17//window.addEventListener("load", onLoad);
18
19function initLerpScroll(target) {
20    if(target) {
21        scroller.target = target;
22        body = document.body;
23
24        TweenLite.set(scroller.target, {
25            rotation: 0.01,
26            force3D: true
27        });
28
29        updateScroller();
30        window.focus();
31        window.addEventListener("resize", onResize);
32        document.addEventListener("scroll", onScroll);
33    }
34}
35
36function updateScroller() {
37    if (scroller.target) {
38
39        var resized = scroller.resizeRequest > 0;
40
41        if (resized) {
42            var height = scroller.target.clientHeight;
43            body.style.height = height + "px";
44            scroller.resizeRequest = 0;
45        }
46
47        var scrollY = window.pageYOffset || html.scrollTop || body.scrollTop || 0;
48
49        scroller.endY = scrollY;
50        scroller.y += (scrollY - scroller.y) * scroller.ease;
51
52        if (Math.abs(scrollY - scroller.y) < 0.05 || resized) {
53            scroller.y = scrollY;
54            scroller.scrollRequest = 0;
55        }
56
57        TweenLite.set(scroller.target, {
58            y: -scroller.y * 0.5
59        });
60
61        requestId =
62            scroller.scrollRequest > 0 ? requestAnimationFrame(updateScroller) : null;
63    }
64}
65
66function onScroll() {
67    scroller.scrollRequest++;
68    if (!requestId) {
69        requestId = requestAnimationFrame(updateScroller);
70    }
71}
72
73function onResize() {
74    if ($(window).width() != windowWidth) {
75        windowWidth = $(window).width();
76
77        scroller.resizeRequest++;
78        if (!requestId) {
79            requestId = requestAnimationFrame(updateScroller);
80        }
81    }
82}