var page = 3;
    var emptyQuery = false;
    function load_posts() {
        page++;

        var category = $('.cat-list__item.active').data('category');
        $.ajax({
            url: flow.ajax_url,
            type: 'POST',
            beforeSend: function (jqXHR) {
                $('body').addClass('loading');

                if ($('.preloader').length) {
                    $('.preloader').removeClass('preloader--hidden');
                }
            },
            data: {
                action: 'scroll_post_load',
                page: page,
                category: category

            },
            success: function (response) {
                if ( response==0 ) {
                    emptyQuery = true;
                    if ($('.preloader').length) {
                        $('.preloader').addClass('preloader--hidden');
                    }
                } else {
                    if ($('.preloader').length) {
                        $('.preloader').addClass('preloader--hidden');
                    }

                    var html = response;
                    $(html).hide().appendTo('.posts-list').fadeIn(1000);
                }

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

function scroll_post_load(){
    $paged = $_POST['page'];
    $category = $_POST['category'];

    if( $category=='all' || !$category ) {
        $args = array(
            'post_type' => 'post',
            'post_status' => 'publish',
            'posts_per_page' => '3',
            'paged' => $paged
        );
    }
    if( $category ) {
        $args = array(
            'post_type' => 'post',
            'post_status' => 'publish',
            'posts_per_page' => '3',
            'paged' => $paged,
            'cat'   => $category
        );
    }

    $wp_query = new WP_Query( $args );
    if ( $wp_query->max_num_pages == get_query_var('paged')) {
        return '0';
    }

    if ($wp_query->have_posts()) :
        while ($wp_query->have_posts()) : $wp_query->the_post();
            show_template('loop-post');
        endwhile;
    endif;

    wp_die();
}
add_action('wp_ajax_scroll_post_load', 'scroll_post_load');
add_action('wp_ajax_nopriv_scroll_post_load', 'scroll_post_load');