{% set additive_container_class = additive_container_class is not defined ? 'col-md-12' : additive_container_class %}<div class="{{ additive_container_class }} alert-container"> {% for label, messages in app.flashes([ 'success', 'warning', 'danger' ]) %} {% for message in messages %} <div class="alert alert-{{ label }}"> {{ message }} <button type="button" class="close btn-close pull-right" data-dismiss="alert" data-bs-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button> </div> {% endfor %} {% endfor %}</div>