External Links in New Tab

External-Link-In-New-Tab.php

<?php
/*
Plugin Name: External Links in New Tab
Plugin URI: https://salvatorenoschese.it/mu-plugin-external-links-in-new-tab
Description: Opens external links in a new tab.
Version: 0.1
Author: Salvatore Noschese
Author URI: https://salvatorenoschese.it
*/

defined("ABSPATH") || die("Access denied.");

add_action('wp_footer', 'custom_external_links_script');
function custom_external_links_script() {
    ?>
    <script>
        (function () {
            var targetBlankPluginLinks = document.querySelectorAll('a[href^="https://"]');   
            targetBlankPluginLinks.forEach(function (targetBlankPluginLink) {
                // Check if the link's domain is different from the current page's domain
                if (targetBlankPluginLink.hostname !== window.location.hostname) {
                    targetBlankPluginLink.setAttribute('target', '_blank');
                }
            });
        })();
    </script>
    <?php
}