status-messages.html.twig

{#
/**
 * @file
 * Theme override for status messages.
 *
 * Displays status, error, and warning messages, grouped by type.
 *
 * An invisible heading identifies the messages for assistive technology.
 * Sighted users see a colored box. See http://www.w3.org/TR/WCAG-TECHS/H69.html
 * for info.
 *
 * Add an ARIA label to the contentinfo area so that assistive technology
 * user agents will better describe this landmark.
 *
 * Available variables:
 * - message_list: List of messages to be displayed, grouped by type.
 * - status_headings: List of all status types.
 * - attributes: HTML attributes for the element, including:
 *   - class: HTML classes.
 */
#}
<div data-drupal-messages>
  <div class="messages__wrapper container">
  {% block messages %}
  {% for type, messages in message_list %}
    {%
      set classes = [
        'messages',
        'messages--' ~ type,
      ]
    %}
    <div
      aria-label="{{ status_headings[type] }}"
      {{ attributes.addClass(classes)|without('aria-label') }}
      role={{ type == 'error' or type == 'warning' ? 'alert' : 'status' }}
    >
      <div class="messages__content">
        {% if status_headings[type] %}
          <h2 class="visually-hidden">{{ status_headings[type] }}</h2>
        {% endif %}
        {% if messages|length > 1 %}
          <ul class="messages__list">
            {% for message in messages %}
              <li class="messages__item">{{ message }}</li>
            {% endfor %}
          </ul>
        {% else %}
          <span class="messages__item">{{ messages|first }}</span>
        {% endif %}
      </div>
    </div>
    {# Remove type specific classes. #}
    {% set attributes = attributes.removeClass(classes) %}
  {% endfor %}
  {% endblock messages %}
  </div>
</div>