<html lang="en"><head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script> <style> </style></head><body><div class="container-fluid" style="background-color:#2196F3;color:#fff;height:200px;"> <h1>Bootstrap affixed-bottom.bs.affix</h1> <p>Scroll to the bottom of this page.</p> <p><strong>The affixed-bottom.bs.affix event occurs when the .affix class has been replaced with the .affix-bottom class.</strong></p></div><br><div class="container"> <div class="row"> <nav class="col-sm-3"> <ul class="nav nav-pills nav-stacked"> <li class="active"><a href="#section1">Section 1</a></li> <li><a href="#section2">Section 2</a></li>