form-response.html.twig

{% set newHtmlElementUniqueId = uniqueId('form-result-') %}

<div id="{{ newHtmlElementUniqueId }}" class="is-hidden">
    <div class="form-response">
        <p>
            Thank you {{ emailAddress }}!
        </p>
        <p>
            But our princess is in another castle...
        </p>
    </div>
</div>

<script>
    (function () {
        var $ = appRequire('jquery');
        var $sourceForm = $('#{{ formId }}');
        var $formReplacementContainer = $('#{{ newHtmlElementUniqueId }}');
        $sourceForm.replaceWith($formReplacementContainer.html());
        $formReplacementContainer.remove();
    })();
</script>