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

<header class="md-header" data-md-component="header">

  <!-- Yandex.Metrika counter -->
  <script type="text/javascript">
      (function (d, w, c) {
          (w[c] = w[c] || []).push(function() {
              try {
                  w.yaCounter18343495 = new Ya.Metrika2({
                      id:18343495,
                      clickmap:true,
                      trackLinks:true,
                      accurateTrackBounce:true,
                      webvisor: {% if builder != "singlehtml" %}true{% else %}false{% endif %}
                  });
              } catch(e) { }
          });
          var n = d.getElementsByTagName("script")[0],
              s = d.createElement("script"),
              f = function () { n.parentNode.insertBefore(s, n); };
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          s.async = true;
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          if (w.opera == "[object Opera]") {
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  <noscript>
      <div><img src="https://mc.yandex.ru/watch/18343495" style="position:absolute; left:-9999px;" alt=""/></div>
  </noscript>
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  <nav class="md-header-nav md-grid">
    <div class="md-flex">
      <div class="md-flex__cell md-flex__cell--shrink">
        <a href="/" title="{{ config.site_name }}" class="md-header-nav__button md-logo">
          {% if config.theme.logo.icon %}
            <i class="md-icon">{{ config.theme.logo.icon }}</i>
          {% else %}
            <img src="{{ base_url }}/{{ config.theme.logo }}" width="40" height="40">
          {% endif %}
        </a>
      </div>
      <div class="md-flex__cell md-flex__cell--shrink">
        <label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
      </div>
      <div class="md-flex__cell md-flex__cell--stretch">
        <div class="md-flex__ellipsis md-header-nav__title" data-md-component="title">
          {% block site_name %}
            {% if config.site_name == page.title %}
              {{ config.site_name }}
            {% else %}
              <span class="md-header-nav__topic">
                {{ config.site_name }}
              </span>
              <span class="md-header-nav__topic">
                {{ page.title }}
              </span>
            {% endif %}
          {% endblock %}
        </div>
      </div>
      <div class="md-flex__cell md-flex__cell--shrink">
      </div>
      <div class="md-flex__cell md-flex__cell--shrink">
        {% block search_box %}
          {% if "search" in config["plugins"] %}
            <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
            {% include "partials/search.html" %}
          {% endif %}
        {% endblock %}
      </div>
      {% if config.repo_url %}
        <div class="md-flex__cell md-flex__cell--shrink">
          <div class="md-header-nav__source">
            <script type="text/javascript">
                if (window.location.pathname.indexOf('/ru/') >= 0) {
                  url = window.location.pathname.replace('/ru/', '/en/');
                  text = "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"50\" height=\"30\" viewBox=\"0,0 25,15\" style=\"border:1px solid #eee;margin: .8rem 0 0 -1.25rem;\">\n" +
                      "<rect width=\"25\" height=\"15\" fill=\"#00247d\"></rect>\n" +
                      "<path d=\"M 0,0 L 25,15 M 25,0 L 0,15\" stroke=\"#fff\" stroke-width=\"3\"></path>\n" +
                      "<path d=\"M 12.5,0 V 15 M 0,7.5 H 25\" stroke=\"#fff\" stroke-width=\"5\"></path>\n" +
                      "<path d=\"M 12.5,0 V 15 M 0,7.5 H 25\" stroke=\"#cf142b\" stroke-width=\"3\"></path>\n" +
                      "</svg>";
                  title = "Switch to English"
                }else{
                  url = window.location.pathname.replace('/en/', '/ru/');
                  text = "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 10 6\" width=\"50\" height=\"30\" style=\"border: 1px solid #eee;margin: .8rem 0 0 -1.25rem\">\n" +
                      "<rect fill=\"#fff\" width=\"10\" height=\"3\"></rect>\n" +
                      "<rect fill=\"#d52b1e\" y=\"3\" width=\"10\" height=\"3\"></rect>\n" +
                      "<rect fill=\"#0039a6\" y=\"2\" width=\"10\" height=\"2\"></rect>\n" +
                      "</svg>";
                  title = "Переключить на русский язык"
               }
               document.write('<a href="' + url + '" title="' + title + '" class="md-flex__ellipsis md-header-nav__title">' + text + '</a>')
             </script>
          </div>
        </div>
      {% endif %}
    </div>
  </nav>
</header>