Description :
data-spy=affix<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Affix Example</title>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<style>
.affix {
top: 20px;
}
</style>
</head>
<body>
<div class="container-fluid" style="background-color:black;height:100px;">
<h1>Bootstrap Affix Example</h1>
</div>
<br>
<div class="container">
<div class="row">
<nav class="col-sm-2">
<ul class="nav nav-pills nav-stacked" data-spy="affix" data-offset-top="205">
<li class="active"><a href="">Part 1</a></li>
<li><a href="">Part 2</a></li>
<li><a href="">Part 3</a></li>
</ul>
</nav>
<div class="col-sm-offset-2 col-sm-7">
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
<h1>Some text</h1>
</div>
</div>
</div>
</body>
</html>