Bootstrap/docs/_includes/nav-home.html

<header class="navbar navbar-inverse navbar-sticky-top navbar-expand-md bd-navbar">
  <a class="navbar-brand" href="{{ site.baseurl }}/">
    {% include icons/bootstrap.svg width="40" height="40" class="d-block" %}
  </a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#bd-main-nav" aria-controls="bd-main-nav" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="bd-main-nav">
    <ul class="navbar-nav">
      <li class="nav-item d-none d-md-block">
        <a class="nav-link {% if page.layout == "home" %}active{% endif %}" href="{{ site.baseurl }}/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Bootstrap');">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link {% if page.layout == "docs" %}active{% endif %}" href="{{ site.baseurl }}/getting-started/introduction/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Docs');">Documentation</a>
      </li>
      <li class="nav-item">
        <a class="nav-link {% if page.title == "Examples" %}active{% endif %}" href="{{ site.baseurl }}/examples/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Examples');">Examples</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="{{ site.themes }}" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Themes');">Themes</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="{{ site.expo }}" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Expo');">Expo</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="{{ site.blog }}" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Blog');">Blog</a>
      </li>
    </ul>

    <ul class="navbar-nav flex-row ml-md-auto my-3 my-md-0">
      {% comment %}
      <li class="nav-item dropdown">
        <a class="nav-item nav-link dropdown-toggle mr-md-2" href="#" id="bd-versions" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          v{{ site.current_version }}
        </a>
        <div class="dropdown-menu dropdown-menu-right" aria-labelledby="bd-versions">
          <a class="dropdown-item" href="{{ site.baseurl }}/v4">Bootstrap 4</a>
          <a class="dropdown-item" href="{{ site.baseurl }}/3.3.7/">Bootstrap v3.3.7</a>
          <a class="dropdown-item" href="{{ site.baseurl }}/2.3.2/">Bootstrap v2.3.2</a>
          <a class="dropdown-item" href="{{ site.baseurl }}/releases/">All versions...</a>
        </div>
      </li>
      {% endcomment %}

      <li class="nav-item">
        <a class="nav-link p-2" href="{{ site.repo }}">
          {% include icons/github.svg class="navbar-nav-svg" %}
        </a>
      </li>
      <li class="nav-item">
        <a class="nav-link p-2" href="https://twitter.com/{{ site.twitter }}">
          {% include icons/twitter.svg class="navbar-nav-svg" %}
        </a>
      </li>
      <li class="nav-item">
        <a class="nav-link p-2" href="{{ site.slack }}">
          {% include icons/slack.svg class="navbar-nav-svg" %}
        </a>
      </li>
    </ul>

    <a class="btn btn-outline-secondary mb-3 mb-md-0 ml-md-3" href="{{ site.download.source }}">Download</a>
  </div>
</header>