Combining fields to generate post title

Replies: 0

I’m using Forminator to collect customer information and create a custom post utilizing the customer’s full name as the post title by updating the code that I found here:

https://wordpress.org/support/topic/post-data-title-generate-from-other-field/

add_action( 'wp_footer', 'wpmudev_radio_field_auto_selection', 9999 );
function wpmudev_radio_field_auto_selection() {
    global $post;
    if ( is_a( $post, 'WP_Post' ) && !has_shortcode( $post->post_content, 'forminator_form' ) ) {
        return;
    }
    ?>
    <script type="text/javascript">
    (function($) {
        $.noConflict();
        $(document).ready(function() {
            setTimeout(function() {
                $('.forminator-custom-form').trigger('after.load.forminator');
            }, 1000);

            $(document).on('after.load.forminator', function(event, form_id) {
                if ( event.target.id == 'forminator-module-XXX' ) {
                    let _title = $('input[name="postdata-1-post-title"]');
                    _title.prop("readonly", true);

                    let _text = $('input[name="text-1"]');

                    $(_text).on("input", function() {
                        _title.val( $(this).val() );
                    });
                }
            });
        });
    })(jQuery);
    </script>
    <?php
}

The form works well, however, it only allows one name field to populate the post title at a time.

How can I modify the code so that it will to combine the First Name, Middle Name, and Last Name fields to populate the title field?