Bootstrap/docs/_includes/navbar.html

<!-- Navbar
================================================== -->
<div class="navbar navbar-fixed-top bs-docs-navbar">
  <div class="container">
    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".nav-collapse">
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
    </button>
    <a class="navbar-brand" href="/">Bootstrap</a>
    <div class="nav-collapse collapse">
      <ul class="nav">
        <li {% if page.title == "Bootstrap" %}class="active"{% endif %}>
          <a href="/">Home</a>
        </li>
        <li {% if page.title == "Getting started" %}class="active"{% endif %}>
          <a href="/getting-started">Getting started</a>
        </li>
        <li {% if page.title == "CSS" %}class="active"{% endif %}>
          <a href="/css">CSS</a>
        </li>
        <li {% if page.title == "Components" %}class="active"{% endif %}>
          <a href="/components">Components</a>
        </li>
        <li {% if page.title == "JavaScript plugins" %}class="active"{% endif %}>
          <a href="/javascript">JavaScript</a>
        </li>
        <li {% if page.title == "Customize and download" %}class="active"{% endif %}>
          <a href="/customize">Customize</a>
        </li>
      </ul>
    </div>
  </div>
</div>