{% if modal %}
  <button
    type="button"
    class="{{ css_class|default:'button chassis-standard-button chassis-primary-button' }}"
    data-chassis-modal-url="{{ modal.url }}"
  >
    {% if icon_class %}<i class="{{ icon_class }}" aria-hidden="true"></i>{% endif %}
    <span>{{ label|default:modal.title }}</span>
  </button>
{% endif %}