错误：未捕获的类型错误：无法读取未定义的属性“替换”

Question

我正在编辑wordpress页面，但没有做任何异常操作，但是我的主页突然失去了背景色（现在边框是白色的，但是页面中间应该是白色的）。

我的控制台不断向我扔：

Uncaught TypeError: Cannot read property 'replace' of undefined

at HTMLButtonElement.<anonymous> (ajax-filter-posts.js?ver=1:57)
at HTMLDivElement.dispatch (jquery.js?ver=1.12.4:3)

at HTMLDivElement.r.handle (jquery.js?ver=1.12.4:3)

at Object.trigger (jquery.js?ver=1.12.4:3)

at Object.a.event.trigger (jquery-migrate.min.js?ver=1.4.1:2)

at HTMLButtonElement.<anonymous> (jquery.js?ver=1.12.4:3)

at Function.each (jquery.js?ver=1.12.4:2)

at a.fn.init.each (jquery.js?ver=1.12.4:2)

at a.fn.init.trigger (jquery.js?ver=1.12.4:3)
    at HTMLDivElement.<anonymous> (ajax-filter-posts.js?ver=1:76)

该怎么办？我的 ajax-filter-posts.js？ver = 1：57 看起来像这样：

(function($) {
$doc = $(document);
$doc.ready( function() {
    /*Retrieve posts*/
    var container = $('.container-async');
    container.each(function() {
        var $movie_tab_id = $(this).attr('id'),
            $movie_tab = "#" + $movie_tab_id,
            $content = $($movie_tab).find('.category-content.flw');
        function get_posts($params) {
            $.ajax({
                type: 'POST',
                url: blockter.ajax_url,
                data: {
                    action: 'do_filter_posts',
                    nonce: blockter.nonce,
                    params: $params
                },
                dataType: 'json',
                success: function(data, textStatus, XMLHttpRequest) {
                    if (data.status === 200) {
                        $content.html(data.content);
                    }
                    else if (data.status === 201) {
                        $content.html(data.message);
                    }
                },
                error: function(MLHttpRequest, textStatus, errorThrown) {

                },
                complete: function(data, textStatus) {

                    msg = textStatus;

                    if (textStatus === 'success') {
                        msg = data.responseJSON.found;
                    }

                    $content.removeClass('loading');
                }
            });
        }

        $($movie_tab).on('click', 'button[data-filter], .category-pagination li a', function(event) {
            if(event.preventDefault) { event.preventDefault(); }
            var $this = $(this),
                $mediaType = null;
            /*Set filter active*/
            if ($this.data('filter')) {
                $this.addClass('active').siblings().removeClass('active');
                $page = $this.data('page');
                $mediaType = $this.data('media');
                $postin = $this.data('postin');
            }
            else {
                /*Pagination*/
                $page = parseInt($this.attr('href').replace(/\D/g,''));
                $mediaType = $this.parent().data('media');
                $postin = $this.parent().data('postin');
                $this = $('.category-filter button.active');
            }
            $content.addClass('loading');
            $content.append('<div class="ajaxloading"></div>');
            $params = {
                'page' : $page,
                'tax'  : $this.data('filter'),
                'term' : $this.data('term'),
                'qty'  : $this.closest($($movie_tab)).data('paged'),
                'media': $mediaType,
                'postin': $this.data('postin'),
            };

            /*Run query*/
            get_posts($params);
        });
        $('button[data-term="all-terms"]').trigger('click');
    });

    var $movie_tab_id = $('.container-async').attr('id'),
    $movie_tab = "#" + $movie_tab_id,
    $content = $($movie_tab).find('.category-content.flw'),
    $contents = $($movie_tab).find('.category-content.specific');

    $($movie_tab).on('click', 'button[data-filter], .category-pagination li a', function(event) {
        $.ajax({
            type: 'POST',
            url: blockter.ajax_url,
            data: {
                action: 'do_filter_posts',
                nonce: blockter.nonce,
                params: $params
            },
            dataType: 'json',
            success: function(data, textStatus, XMLHttpRequest) {
                if (data.status === 200) {
                    $content.html(data.content);
                    $contents.html(data.content);
                }
                else if (data.status === 201) {
                    $content.html(data.message);    
                    $contents.html(data.message);   
                }
            },
            error: function(MLHttpRequest, textStatus, errorThrown) {

            },
            complete: function(data, textStatus) {

                msg = textStatus;

                if (textStatus === 'success') {
                    msg = data.responseJSON.found;
                }

                $content.removeClass('loading');
                $contents.removeClass('loading');
            }
        });
        $contents.addClass('loading');
        $contents.append('<div class="ajaxloading"></div>');

    });
});

})(jQuery);

并指出错误在这里：

/*Pagination*/
                $page = parseInt($this.attr('href').replace(/\D/g,''));
                $mediaType = $this.parent().data('media');
                $postin = $this.parent().data('postin');
                $this = $('.category-filter button.active');