Show the Login Form first in the LearnDash Registration form

ld-show-the-login-form-first-on-page-load.php

<?php
/*
* Show the Login Form first on the Registration page.
*/

add_action( 'wp_footer', function () {
    // Get the LearnDash registration page ID.
    $ld_registration_page_id = learndash_registration_page_get_id();

    // Exit if user is already logged in or not on the registration page.
    if ( is_user_logged_in() || get_the_ID() !== $ld_registration_page_id ) {
        return;
    }

    // Enqueue jQuery only if it's not already enqueued.
    if ( ! wp_script_is( 'jquery', 'enqueued' ) ) {
        wp_enqueue_script( 'jquery' );
    }

    ?>
    <script>
        ( function($) {
            // Check if jQuery is defined.
            if ( typeof $ === 'undefined' ) {
                console.error( 'jQuery is not loaded' );
                return;
            }

            $( document ).ready( function() {
                $( '#learndash_registerform, .registration-login' ).hide();
                $( '.registration-login-form, .show-register-form, .show-password-reset-link' ).show();
            });
        })( jQuery );
    </script>
    <?php
});