https://www.stadtwerke-lohmar.de/typo3temp/assets/vhs/vhs-assets-f6ba8e696259dd852f09f04d54a2cddd.js

1
2                
3                    (function() {
4                        
5                        //
6                        // Intersection Observer
7                        //
8                        if(!!window.IntersectionObserver) {
9                            let observerOptions991 = {
10                                root: null,
11                                rootMargin: "0px 0px 0px 0px",
12                                //threshold: .1//[]
13                            };
14                            var lastScrollTop991 = 0;
15                            const scrollIntersectionMarkers991 = document.querySelectorAll(".intro-animation-intersection-marker-991");
16                            const scrollIntersectionObserver991 = new IntersectionObserver (function (entries, observer) {
17                                var entryCounter = 0;
18                                entries.forEach(function(entry) {
19                                    var st = window.pageYOffset || document.documentElement.scrollTop;
20                                    if (st >= lastScrollTop991) {
21                                        // downscroll code
22                                        entry.target.classList.add('scrolled-down');
23                                        entry.target.classList.remove('scrolled-up');
24                                    } else {
25                                        // upscroll code
26                                        entry.target.classList.add('scrolled-up');
27                                        entry.target.classList.remove('scrolled-down');
28                                    }
29                                    lastScrollTop991 = st <= 0 ? 0 : st; // For Mobile or negative scrolling
30                                    
31                                    if (entry.isIntersecting) {
32                                        entry.target.classList.add('blended-in');
33                                        entry.target.classList.add('delay-index-'+entryCounter);
34                                        
35                                        if (document.querySelectorAll('.intro-animation-intersection-marker-991:not(.blended-in)').length === 0) {
36                                            document.getElementById('lr-image-gallery-991').classList.add('overflow-visible');
37                                        }
38
39                                        //var id = entry.target.id;
40                                        //scrollToTarget('#'+id);
41                                    }
42                                    /*
43                                    } else {
44                                        entry.target.classList.remove('blended-in', 'delay-index-0', 'delay-index-1', 'delay-index-2', 'delay-index-3', 'delay-index-4', 'delay-index-5', 'delay-index-6', 'delay-index-7', 'delay-index-8', 'delay-index-9', 'delay-index-10', 'delay-index-11');
45                                        document.getElementById('lr-image-gallery-991').classList.remove('overflow-visible');
46                                    }
47                                    */
48
49                                    entryCounter++;
50
51                                });
52                            }, observerOptions991);
53                            scrollIntersectionMarkers991.forEach(function (marker) {
54                                scrollIntersectionObserver991.observe(marker);
55                            });
56                                        
57                        }
58
59                    })();
60                
61            
62