ajax pagination

<?php
//in functions.php
function bar_2_share_scripts() {
wp_enqueue_script('top-five-ajax-pagination', get_stylesheet_directory_uri() . '/assets/js/pagination.js', array('jquery'), microtime().'', true);
 global $wp_query;
    wp_localize_script( 'top-five-ajax-pagination', 'ajaxpagination', array(
        'ajaxurl' => admin_url( 'admin-ajax.php' ),
        'query_vars' => json_encode( $wp_query->query )
    ));
}
add_action( 'wp_enqueue_scripts', 'bar_2_share_scripts' );

function bar_ajax_pagination() {
    $p_type = array('articles', 'post');
    $_POST['postType'] = $p_type;
    $paged = $_POST['page'];

    $ppp = 6;
    $do_not_duplicate[] = get_the_ID();
    $query_vars = [
        'paged'             => $paged,
        'post_type'         => $p_type,
        'orderby'           =>'date',
        'order'             => 'DESC',
        'posts_per_page'    => $ppp,
        'post_parent'       => 0,
        'post__not_in'      => $do_not_duplicate


    ];

    // $query_vars['paged'] = $_POST['page'];


    $posts = new WP_Query( $query_vars );

    $GLOBALS['wp_query'] = $posts;

    if( ! $posts->have_posts() ) {
        get_template_part( 'content', 'none' );
    }
    else {
        while ( $posts->have_posts() ) {

            $posts->the_post();

            get_template_part( 'template-parts/content', $_POST['postType'] );
        }
//        $posts->rewind_posts();
        wp_reset_query();
    }

    die();
}

add_action( 'wp_ajax_nopriv_ajax_pagination', 'bar_ajax_pagination' );
add_action( 'wp_ajax_ajax_pagination', 'bar_ajax_pagination' );