function cff_enqueue_test_scripts() {
    wp_enqueue_script(
        'cff-test',
        plugin_dir_url(__FILE__) . 'cff-to-cart.js',
        array('jquery'),
        '1.0',
        true
    );
}
add_action('wp_enqueue_scripts', 'cff_enqueue_test_scripts');
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://ned31.com/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://ned31.com/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://ned31.com/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://ned31.com/wp-sitemap-posts-product-1.xml</loc></sitemap><sitemap><loc>https://ned31.com/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://ned31.com/wp-sitemap-taxonomies-product_cat-1.xml</loc></sitemap><sitemap><loc>https://ned31.com/wp-sitemap-taxonomies-product_tag-1.xml</loc></sitemap><sitemap><loc>https://ned31.com/wp-sitemap-taxonomies-pa_colour-1.xml</loc></sitemap><sitemap><loc>https://ned31.com/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>