<!DOCTYPE html>
<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="../../maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
<script src="../../ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="../../cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
<script src="../../maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Alerts</h2>
<p>Alerts are created with the .alert class, followed by a contextual color classes:</p>
<div class="alert alert-danger">
<h3>Danger!</h3>
<p>This alert box could indicate a dangerous or potentially negative action.</p>
</div>
<div class="alert alert-warning">
<h3>Warning!</h3>
<p>This alert box could indicate a warning that might need attention.</p>
</div>
<div class="alert alert-success">
<h3>Success!</h3>
<p>This alert box could indicate a successful or positive action.</p>
</div>
<div class="alert alert-primary">
<h3>Primary!</h3>
<p>Indicates an important action.</p>
</div>
</div>
</body>
</html>