JS (protected/modules/profile/widgets/assets/js/pagination.js)

document.querySelector(document).addEventListener('ready', function() {
    let addMoreBtn = document.querySelector('#add-more');
    let pager = document.querySelector('.pager__list');
    const animationClass = 'rotate';
    var clicks = clicks ? clicks : 1;

    addMoreBtn.addEventListener('click', (e) => {
        let btn = document.querySelector(e.currentTarget);
        if (btn.classList.contains(animationClass)) {
            return;
        }
        btn.classList.add(animationClass);

        let url = pager.querySelector('.pager-list__item_active:last + li a').attr('href')
        let ajax = new AppSendAJAX({
            'method': 'get',
            'serverScriptUrl': url
        });

        ajax.sendData().then((responseJson) => {
            let type = '';
            if (responseJson.hasOwnProperty('type')) {
                type = responseJson['type'];
            }

            let count = 0;
            if (responseJson.hasOwnProperty('gaData')) {
                responseJson['gaData'].forEach((e) => {
                    gaWrapper.ga('ec:addImpression', e);
                    cartRes.push(e);
                });

                count = clicks * 20 + responseJson['gaData'].length;
            }

            if (responseJson.hasOwnProperty('items')) {
                document.querySelector('.pagination-container').insertAdjacentHTML("beforeend",responseJson['items']);
                transformPaginationItems(++clicks, pager)
            }
            if (responseJson.hasOwnProperty('items_count')) {
                let showOnPageBlock = document.querySelector('.n-profile-paginator__text span')
                showOnPageBlock.text(Number.parseInt(showOnPageBlock.text()) + responseJson['items_count']);
            }
            document.querySelector(window).lazyLoadXT();

            modifyContent(type);

            if (count === 0) {
                count = document.querySelector('.pagination-item').length;
            }
            sendShowMoreGa(count, type);
        }).always(() => {
            btn.removeClass(animationClass);
        });
    });

    function transformPaginationItems(selectedPages, pager) {
        let currentPageNumber = pager.attr('data-current-page');
        let totalPageCount = pager.attr('data-last-page');
        let count = ((currentPageNumber - 1) + selectedPages) * parseInt(addMoreBtn.attr('data-limit'));
        let areMoreItems = count < parseInt(addMoreBtn.attr('data-items-count'));

        let pagination = new PaginationHelper(currentPageNumber, totalPageCount, undefined, selectedPages);
        pager.html(pagination.getHtml());

        if (!areMoreItems) {
            addMoreBtn.hide();
        }
    }

    function modifyContent(type) {
        if (type === 'products') {
            fillFavoritesHearts();

            return;
        }

        //Скрываем лишние названия месяцев
        let currId = '0';
        document.querySelector('div.n-profile-orders-list__date[data-id]').each(function () {
            document.querySelector(this).hide();
            let id = document.querySelector(this).attr('data-id');
            if (id !== currId) {
                document.querySelector(this).show();
                currId = id;
            }
        });

        newprofileOrdersUI._rebuildCartPictures();
    }
});