After manually downloading Bootstrap from http://getbootstrap.com/ version 4.0, I encountered issues with the navigation, XS, and panel classes not working as expected. Despite searching for "xs" in boostrap.min.css, it was not found. This has caused frustration as some classes are functioning correctly (sm, md, lg) while others are not. I have spent the past three weeks trying to resolve this problem without success. Can anyone provide a solution? Here is an excerpt of my code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="UTF-8">
<meta http-equiv="X-UA-compatible" Content="IE-edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="css/bootstrap.min.css" rel="stylesheet" type="text/css">
</head>
<body>
<div class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="fa fa-align-justify"></span>
</button>
<span class="navbar-brand">Diffie</span>
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li><a href="#">Link1</a></li>
<li><a href="#">Link2</a></li>
<li><a href="#">Link3</a></li>
<li><a href="#">Link4</a></li>
<li><a href="#">Link5</a></li>
</ul>
</div>
</div>
<div class="container">
<div class="row">
<div class="col-sm-6">
<p class="hidden-xs"><b>AAA Ipsum is simply dummy text of the printing</b> and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.</p>
</div>
<div class="col-sm-6">
<p>AAA Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.</p>
</div>
</div>
<div class="row">
<div class="col-sm-6 col-md-4 col-lg-3">
<div style="width: auto;height: auto;background-color: gray;color: white;padding: 5px;margin-bottom: 10px;">
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.</p>
</div>
</div>
<!-- Additional rows and columns go here -->
</div>
</div>
</body>
</html>