presto-8.x-2.2/themes/presto_theme/templates/system/menu--main.html.twig

{#
/**
 * @file
 * Bootstrap Barrio's override to display a menu.
 *
 * Available variables:
 * - menu_name: The machine name of the menu.
 * - items: A nested list of menu items. Each menu item contains:
 *   - attributes: HTML attributes for the menu item.
 *   - below: The menu item child items.
 *   - title: The menu link title.
 *   - url: The menu link url, instance of \Drupal\Core\Url
 *   - localized_options: Menu link localized options.
 *   - is_expanded: TRUE if the link has visible children within the current
 *     menu tree.
 *   - is_collapsed: TRUE if the link has children within the current menu tree
 *     that are not currently visible.
 *   - in_active_trail: TRUE if the link is in the active trail.
 */
#}
{% import _self as menus %}

{#
  We call a macro which calls itself to render the full tree.
  @see http://twig.sensiolabs.org/doc/tags/macro.html
#}
{{ menus.menu_links(items, attributes, 0) }}

{% macro menu_links(items, attributes, menu_level) %}
  {% import _self as menus %}
  {% if items %}
    {% if menu_level == 0 %}
<ul{{ attributes.addClass('menu nav navbar-nav') }}>
  {% else %}
  <ul class="dropdown-menu">
    {% endif %}
    {% for item in items %}
      {%
      set classes = [
      menu_level ? 'dropdown-item' : 'nav-item',
      item.is_expanded ? 'menu-item--expanded',
      item.is_collapsed ? 'menu-item--collapsed',
      item.in_active_trail ? 'active',
      item.below ? 'dropdown',
      ]
      %}
      <li{{ item.attributes.addClass(classes) }}>
        {%
        set link_classes = [
        not menu_level ? 'nav-link',
        item.in_active_trail ? 'active',
        ]
        %}
        {% if item.below %}
          {{ link(item.title, item.url, {'class': link_classes, 'data-target': '#', 'data-toggle': 'dropdown', 'aria-expanded': 'false'}) }}
          {{ menus.menu_links(item.below, attributes, menu_level + 1) }}
        {% else %}
          {{ link(item.title, item.url, {'class': link_classes}) }}
        {% endif %}
      </li>
    {% endfor %}
  </ul>
  {% endif %}
  {% endmacro %}