https://www.ametekinstruments.it/-/media/base-themes/searchtheme/scripts/component-search-load-more.js?thm=1

1XA.component.search.loadMore = (function ($, document) {
2
3    var api = {},
4        initialized = false,
5        SearchLoadMoreModel,
6        SearchLoadMoreView;
7
8    SearchLoadMoreModel = Backbone.Model.extend({
9        defaults: {
10            dataProperties: {},
11            sig: []
12        }
13    });
14
15    SearchLoadMoreView = Backbone.View.extend({
16        initialize : function () {
17            var dataProperties = this.$el.data(),
18                that = this;
19
20            if (dataProperties.properties.searchResultsSignature === null){
21                dataProperties.properties.searchResultsSignature = "";
22            }
23
24            if (this.model) {
25                this.model.set('sig', dataProperties.properties.searchResultsSignature.split(','));
26            }
27
28            XA.component.search.vent.on("results-loaded", function (results) {
29                var sig = that.model.get('sig'),
30                    offset = typeof results.offset !== "undefined" ? results.offset : 0,
31                    i;
32
33                for (i = 0; i < sig.length; i++) {
34                    if (sig[i] === results.searchResultsSignature) {
35                        if (results.pageSize >= results.dataCount || offset + results.pageSize >= results.dataCount) {
36                            that.$el.hide();
37                        } else {
38                            that.$el.show();
39                        }
40                    }
41                }
42            });            
43        },
44        events: {
45            'mousedown input': 'loadMore'
46        },
47        loadMore: function () {
48            var sig = this.model.get('sig'),
49                i;
50
51            for (i = 0; i < sig.length; i++) {                
52                XA.component.search.vent.trigger('loadMore', {
53                    sig: sig[i]
54                });
55            }
56        }
57    });
58
59    api.init = function () {
60        if ($('body').hasClass('on-page-editor') || initialized) {
61            return;
62        }
63
64        var searchLoadMore = $('.load-more');
65        _.each(searchLoadMore, function (elem) {
66            new SearchLoadMoreView({el: $(elem), model : new SearchLoadMoreModel()});
67        });
68
69        initialized = true;
70    };
71
72    return api;
73
74}(jQuery, document));
75
76XA.register('searchLoadMore', XA.component.search.loadMore);