title: Bootstrap Navbar toggle button not working
body: <p>When I shrink the window and click the button it doesn't respond. How do I fix this?</p>
  <pre><code>&lt;button type=&quot;button&quot; 
          class=&quot;navbar-toggle&quot; 
          data-toggle=&quot;collapse&quot; 
          data-target=&quot;.navbar-collapse&quot;&gt;
  
      &lt;span class=&quot;sr-only&quot;&gt;Toggle navigation&lt;/span&gt;
      &lt;span class=&quot;icon-bar&quot;&gt;&lt;/span&gt;
      &lt;span class=&quot;icon-bar&quot;&gt;&lt;/span&gt;
      &lt;span class=&quot;icon-bar&quot;&gt;&lt;/span&gt;
  &lt;/button&gt;
  
  &lt;div class=&quot;collapse navbar-collapse&quot;&gt;
      &lt;ul class=&quot;nav navbar-nav&quot;&gt;
          &lt;li&gt;
              &lt;a href=&quot;&quot;&gt;Page 1&lt;/a&gt;
          &lt;/li&gt;
          &lt;li&gt;
              &lt;a href=&quot;&quot;&gt;Page 2&lt;/a&gt;
          &lt;/li&gt;
          &lt;li&gt;
              &lt;a href=&quot;&quot;&gt;Page 3&lt;/a&gt;
          &lt;/li&gt;
      &lt;/ul&gt;
  </code></pre>
  <p>Libraries are jQuery 2.1.3 and bootstrap 3.3.1.</p>