https://eulemagazin.de/wp-content/themes/eule/src/js/ajax/load_next_page.js?ver=1.0.0

1/**
2 * Override pagination link with ajax call
3 *
4 * @url https://rudrastyh.com/wordpress/load-more-posts-ajax.html
5 */
6jQuery(document).ready(function($) {
7    var container = document.querySelector('#paginationcontainer');
8    var button = document.querySelector('nav.pagination a');
9    
10    if (button) {
11        /**
12         * Grab request data from global object set via wp_localize_script.
13         */
14        var requestData = ajaxDataNextPage;
15        var buttonContent = button.innerHTML;
16        button.addEventListener("click", function (e) {
17            e.preventDefault();
18            button.style.width = $(button).outerWidth() + 'px';
19            button.classList.add('disabled');
20            button.innerHTML = "<div class='loading'></div>";
21
22            var data = {
23                'action': 'load_next_page',
24                'query': requestData.posts,
25                'page': requestData.currentPage
26            };
27            jQuery.post(requestData.ajaxUrl, data)
28                .done(function (response) {
29                    var tmpContainer = document.createElement('div');
30                    tmpContainer.innerHTML = response;
31                    while (tmpContainer.firstChild) {
32                        container.appendChild(tmpContainer.firstChild);
33                    }
34                    requestData.currentPage++;
35                    if (requestData.currentPage === requestData.maxPage) {
36                        button.remove();
37                    }
38                })
39                .fail(function() {
40                    console.error('Ajax pagination request failed');
41                })
42                .always(function() {
43                    button.innerHTML = buttonContent;
44                    button.style.width = 'auto';
45                    button.classList.remove('disabled');
46                });
47        });
48    }
49});