Bootstrap/docs/_includes/nav-home.html

<header class="bd-header" role="banner">
  <a class="bd-header-mark" href="{{ site.baseurl }}">Bootstrap 4 Alpha</a>

  <nav class="nav nav-pills bd-header-nav">
    <a class="nav-link" href="{{ site.baseurl }}/getting-started/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Docs');">Documentation</a>
    <a class="nav-link" href="{{ site.expo }}" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Expo');">Expo</a>
    <a class="nav-link" href="{{ site.blog }}" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Blog');">Blog</a>
  </nav>
</header>