title: I am just added hamburger button in my navbar but it does not working right now?
body: <pre><code>&lt;nav class=&quot;navbar navbar-expand-lg navbar-dark bg-dark &quot;&gt;
      &lt;a class=&quot;navbar-brand brand&quot; href=&quot;#&quot;&gt;Shivaji Maskar&lt;/a&gt;
      &lt;button class=&quot;navbar-toggler&quot; type=&quot;button&quot; data-toggle=&quot;collapse&quot; data-target=&quot;#collapsibleNavbar&quot;&gt;
      &lt;div class=&quot;collapse navbar-collapse&quot; id=&quot;collapsibleNavbar&quot;&gt;
        &lt;ul class=&quot;navbar-nav ml-auto &quot;&gt;
          &lt;li class=&quot;nav-item&quot;&gt;&lt;a class=&quot;nav-link&quot; href=&quot;#&quot;&gt;Contact&lt;/a&gt;&lt;/li&gt;
          &lt;li class=&quot;nav-item&quot;&gt;&lt;a class=&quot;nav-link&quot; href=&quot;#&quot;&gt;Fees&lt;/a&gt;&lt;/li&gt;
          &lt;li class=&quot;nav-item&quot;&gt;&lt;a class=&quot;nav-link&quot; href=&quot;#&quot;&gt;Item List&lt;/a&gt;&lt;/li&gt;
        &lt;/ul&gt;
      &lt;/div&gt;
  
    &lt;/nav&gt;
  </code></pre>