Sub menu on hover over navbar link in bootstrap
<p>I want to to implement a feature in my bootstrap project like whenever someone will hover over my one of navbar links, it will display a detailed menu vertically like a menu in image below</p>

<p><a href="https://i.stack.imgur.com/vqzhu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vqzhu.png" alt="enter image description here"></a> </p>

<p>I know how to make dropdown on hover over navbar link, but how can i populate this type of sub menu on hover.
Is already there any tutorial or example exists then do share with me.
If not then share idea!</p>

<p>Thanks! </p>

<p>Html</p>

<pre><code>&lt;nav class="navbar navbar-default"&gt;
  &lt;div class="container-fluid"&gt;
    &lt;!-- Brand and toggle get grouped for better mobile display --&gt;
    &lt;div class="navbar-header"&gt;
      &lt;button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"&gt;
        &lt;span class="sr-only"&gt;Toggle navigation&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;Brand&lt;/a&gt;
    &lt;/div&gt;

    &lt;!-- Collect the nav links, forms, and other content for toggling --&gt;
    &lt;div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"&gt;
      &lt;ul class="nav navbar-nav"&gt;
        &lt;li class="active"&gt;&lt;a href="#"&gt;Link &lt;span class="sr-only"&gt;(current)&lt;/span&gt;&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a href="#"&gt;Link&lt;/a&gt;&lt;/li&gt;
        &lt;li class="dropdown"&gt;
          &lt;a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"&gt;Dropdown &lt;span class="caret"&gt;&lt;/span&gt;&lt;/a&gt;
          &lt;ul class="dropdown-menu"&gt;
            &lt;li&gt;&lt;a href="#"&gt;Action&lt;/a&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href="#"&gt;Another action&lt;/a&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href="#"&gt;Something else here&lt;/a&gt;&lt;/li&gt;
            &lt;li role="separator" class="divider"&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href="#"&gt;Separated link&lt;/a&gt;&lt;/li&gt;
            &lt;li role="separator" class="divider"&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href="#"&gt;One more separated link&lt;/a&gt;&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
      &lt;/ul&gt;
      &lt;form class="navbar-form navbar-left" role="search"&gt;
        &lt;div class="form-group"&gt;
          &lt;input type="text" class="form-control" placeholder="Search"&gt;
        &lt;/div&gt;
        &lt;button type="submit" class="btn btn-default"&gt;Submit&lt;/button&gt;
      &lt;/form&gt;
      &lt;ul class="nav navbar-nav navbar-right"&gt;
        &lt;li&gt;&lt;a href="#"&gt;Link&lt;/a&gt;&lt;/li&gt;
        &lt;li class="dropdown"&gt;
          &lt;a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"&gt;Dropdown &lt;span class="caret"&gt;&lt;/span&gt;&lt;/a&gt;
          &lt;ul class="dropdown-menu"&gt;
            &lt;li&gt;&lt;a href="#"&gt;Action&lt;/a&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href="#"&gt;Another action&lt;/a&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href="#"&gt;Something else here&lt;/a&gt;&lt;/li&gt;
            &lt;li role="separator" class="divider"&gt;&lt;/li&gt;
            &lt;li&gt;&lt;a href="#"&gt;Separated link&lt;/a&gt;&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
      &lt;/ul&gt;
    &lt;/div&gt;&lt;!-- /.navbar-collapse --&gt;
  &lt;/div&gt;&lt;!-- /.container-fluid --&gt;
&lt;/nav&gt;
</code></pre>