title: Why doesn't bootstrap nav-bar open on small screens?
body: <p>This <code>nav-bar</code> works fine when the screen is larger than <code>640px</code>, but when the menu-button is displayed on small screens, clicking it does not show menu items. Here is the <a href="http://www.bunkerhill.com/#/" rel="nofollow">site</a>. </p>
  
  <pre><code>&lt;nav class="navbar navbar-inverse"&gt;
      &lt;div class="container-fluid"&gt;
          &lt;div class="navbar-header"&gt;
              &lt;button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#BHC-Navbar"&gt;
                  &lt;span class="icon-bar"&gt;&lt;/span&gt;
                  &lt;span class="icon-bar"&gt;&lt;/span&gt;
                  &lt;span class="icon-bar"&gt;&lt;/span&gt; 
                  &lt;span class="icon-bar"&gt;&lt;/span&gt; 
                  &lt;span class="icon-bar"&gt;&lt;/span&gt; 
              &lt;/button&gt;
              &lt;a class="navbar-brand" href="#"&gt;Bunker Hill&lt;/a&gt;
          &lt;/div&gt;
          &lt;div class="collapse navbar-collapse" id="BHC-Navbar"&gt;
              &lt;ul class="nav navbar-nav"&gt;
                  &lt;li class="active"&gt;&lt;a href="#"&gt;&lt;i class="glyphicon glyphicon-home"&gt;&lt;/i&gt; Home&lt;/a&gt;&lt;/li&gt;
                  &lt;li&gt;&lt;a href="#services" class="glyphicon glyphicon-info-sign"&gt; Services&lt;/a&gt;&lt;/li&gt;
                  &lt;li&gt;&lt;a href="#clients" class="glyphicon glyphicon-info-sign"&gt; Clients&lt;/a&gt;&lt;/li&gt; 
                  &lt;li&gt;&lt;a href="#about" class="glyphicon glyphicon-info-sign"&gt; About&lt;/a&gt;&lt;/li&gt; 
                  &lt;li&gt;&lt;a href="#contact"&gt;&lt;i class="glyphicon glyphicon-envelope"&gt;&lt;/i&gt; Contact&lt;/a&gt;&lt;/li&gt; 
              &lt;/ul&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/nav&gt;
  </code></pre>