ClickHouse/docs/tools/mkdocs-material-theme/partials/nav.html

<nav class="md-nav md-nav--primary" data-md-level="0">
  {% if not config.extra.single_page %}
  <label class="md-nav__title md-nav__title--site" for="drawer">
    {{ config.site_name }}
  </label>

  <ul class="md-nav__list" data-md-scrollfix>
    {% for nav_item in nav %}
      {% set path = "nav-" + loop.index | string %}
      {% set level = 1 %}
      {% include "partials/nav-item.html" %}
    {% endfor %}
  </ul>
  {% endif %}

  <ul id="md-extra-nav" class="md-nav__list" data-md-scrollfix>
    <li class="md-nav__item md-nav__item--active">
      {% if config.theme.language == 'ru' %}
        {% if config.extra.single_page %}
          <a href="{{ base_url }}" class="md-nav__link md-nav__link--active">Многостраничная версия</a>
        {% else %}
          <a href="{{ base_url }}/single/" class="md-nav__link md-nav__link--active">Одностраничная версия</a>
        {% endif %}
      {% else %}
        {% if config.extra.single_page %}
          <a href="{{ base_url }}" class="md-nav__link md-nav__link--active">Multi page version</a>
        {% else %}
          <a href="{{ base_url }}/single/" class="md-nav__link md-nav__link--active">Single page version</a>
        {% endif %}
      {% endif %}
    </li>
    {% if config.repo_url %}
    <li class="md-nav__item md-nav__item--active">
      <a href="{{ config.repo_url }}" rel="external nofollow" target="_blank" class="md-nav__link">
        {% if config.theme.language == 'ru' %}
          Исходники ClickHouse
        {% else %}
          ClickHouse sources
        {% endif %}
      </a>
    </li>
    {% endif %}
  </ul>
</nav>