adaptivetheme-8.x-3.x-dev/at_core/templates/form/form.html.twig

{#
/**
 * @file
 * Theme override for a 'form' element.
 *
 * Available variables
 * - attributes: A list of HTML attributes for the wrapper element.
 * - children: The child elements of the form.
 *
 * @see template_preprocess_form()
 */
#}
<form{{ attributes.setAttribute('role', 'form') }}>
  {{ children }}
</form>