https://spets-santehnika.ru/g/templates/shop2/2.110.2/electrical-goods/additional_work/lazy_load/lazy_load.js

1shop2.queue.lazyLoad = function() {
2    var $document = $(document),
3        $window = $(window),
4        blocked = false,
5        products = $(".product-list");
6
7    function path(url, param, value) {
8        return url + (~url.indexOf("?") ? "&" : "?") + param + "=" + value;
9    }
10    
11    if (shop2.my.lazy_load_subpages && products.get(0)) {
12        $document.on("click", ".lazy-pagelist-btn", function(e){
13        	
14        	e.preventDefault();
15        	
16            var pagelist = $(".shop-pagelist");
17            var next = pagelist.find(".active-num").next().find("a");
18
19            if (!next.length) {
20                return;
21            }
22
23            if (!blocked && next.get(0)) {
24                blocked = true;
25              
26                $.get(path(next.attr("href"), "products_only", 1), function(data) {
27                	var productsHtml = $(data).filter(".product-list").html();
28                	var $lazyLoad = $(data).filter(".lazy-pagelist");
29                	
30                	$(".lazy-pagelist").remove();
31                	
32                	$(".product-list").append(productsHtml);
33                	$(".product-list").after($lazyLoad);
34                	
35                	$(".product-list .gr_lazy_load").each(function(){
36					    $(this).attr("src", $(this).attr("data-src"));
37					});  
38                	
39                	if (typeof viewLots === "function") {
40                		viewLots();
41                	};
42                	
43                	if (typeof amountInit === "function") {
44                		amountInit();
45                	};
46				    
47				    pagelist = $(".shop-pagelist");
48				    
49                    pagelist.find("a").each(function() {
50                        var $this = $(this),
51                            href = $this.attr("href");
52                        $this.attr("href", href.replace(/[&|\?]*products_only=[^&]/, ""));
53                    });
54
55                    blocked = false;
56                });
57                /*1553*/
58                var url = document.location.origin;
59				$.ajax({
60				    url: url,
61				    success: function(data){
62				        if (shop2.my.gr_img_lazyload) {
63				          try{
64				           var myLazyLoad = new LazyLoad();
65				           myLazyLoad.update();
66				          } catch (e) {
67				            console.log(e); 
68				          }
69				        }
70				    }
71				});
72                /*1553*/
73            }
74        });
75    }
76
77};