Open External Link in New Tab in WordPress

add_action('wp_footer', 'open_external_links_in_new_tab');

function open_external_links_in_new_tab() {

    ?>

    <script type="text/javascript">

    document.addEventListener("DOMContentLoaded", function() {

        const domain = window.location.hostname;

        const links = document.querySelectorAll("a[href^='http']");

        links.forEach(link => {

            if (link.hostname !== domain) {

                link.setAttribute("target", "_blank");

                link.setAttribute("rel", "noopener noreferrer");

            }

        });

    });

    </script>

    <?php

}