bridge-8.x-1.x-dev/templates/navigation/menu--main.html.twig

{#
/**
 * @file
 * Theme 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 = "nav nav-stacked dropdown-menu">
    {% endif %}
    {% for item in items %}

      {%
        set classes = [
        item.is_expanded ? 'has-children js-has-children expanded dropdown',
        item.in_active_trail ? 'active-trail js-active-trail',
        item.title|clean_class,
        item.url.routeName == '<nolink>' ? 'nolink' : '',
        ]
      %}


        <li{{ item.attributes.addClass(classes) }}>

        {% set title %}
          <span>{{ item.title }}</span>
        {% endset %}


        {% if item.below %}
            {{ link(item.title, item.url, { 'class':['dropdown-toggle'], 'data-toggle':['dropdown']}) }}
        {% else %}
            {{ link(item.title, item.url) }}
        {% endif %}

        {% if item.below %}
          {{ menus.menu_links(item.below, attributes, menu_level + 1) }}
        {% endif %}

      </li>
    {% endfor %}
    </ul>
  {% endif %}
{% endmacro %}