Keep Gravity Forms Displayed After Submission

gravity-forms-confirmation-remain.php

<?php
// Allow the Gravity form to stay on the page when confirmation displays.
add_filter( 'gform_pre_submission_filter', 'dw_show_confirmation_and_form' );
function dw_show_confirmation_and_form( $form ) {

    // Inserts a shortcode for the form without title or description
    $shortcode = '[gravityform id="' . $form['id'] . '" title="false" description="false"]';

    // Ensures that new lines are not added to HTML Markup
    ob_start();
    echo do_shortcode($shortcode);
    $html = str_replace(array("\r","\n"),'',trim(ob_get_clean()));

    // Inserts the form before the confirmation message
    if ( array_key_exists( 'confirmations', $form ) ) {
        foreach ( $form['confirmations'] as $key => $confirmation ) {
            $form['confirmations'][ $key ]['message'] = $html . '<div class="confirmation-message">' . $form['confirmations'][ $key ]['message'] . '</div>';
        }
    }

    return $form;
}

// Insert Javascript into the site footer to clear Gravity Forms inputs after submission
add_action( 'wp_footer', 'dw_gf_footer_scripts' );
function dw_gf_footer_scripts() {
    ?>
    <script>
    // Get all form inputs into arrays
    const inputs = document.querySelectorAll('.gform-body input');
    const textareas = document.querySelectorAll('.gform-body textarea');
    const inputsArray = Array.from(inputs);
    const textareasArray = Array.from(textareas);

    // Run clearValues on each input and textarea
    inputsArray.forEach(clearValues);
    textareasArray.forEach(clearValues);

    // Clear the values of inputs
    function clearValues( elem ) {
        // Do not clear hidden values
        if(elem.type !== 'hidden') {
            elem.value = '';
        }
    }
    </script>
    <?php
}