Bootstrap 3 navbars dropdown menus (Interactive Example)

<!DOCTYPE html>
<title>My Example</title>


<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">

<nav class="navbar navbar-default">
<div class="container-fluid">


<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#alignment-example" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Your Brand</a>
</div>


<div class="collapse navbar-collapse" id="alignment-example">


<ul class="nav navbar-nav">
<li><a href="#">Link 1</a></li>
<li><a href="#">Link 2</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">About Us <span class="caret"></span></a>
<ul class="dropdown-menu" aria-labelledby="about-us">
<li><a href="#">Our Story</a></li>
<li><a href="#">Our Team</a></li>
<li><a href="#">Contact Us</a></li>
</ul>
</li>
</ul>


</div>

</div>
</nav>


<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>

<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>


<script>
// Initialize tooltip component
$(function () {
  $('[data-toggle="tooltip"]').tooltip()
})

// Initialize popover component
$(function () {
  $('[data-toggle="popover"]').popover()
})
</script>