The .fade and .in classes adds a fading effect when closing the alert message.
Sample Code:
<!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=”http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css”>
<script src=”https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js”></script>
<script src=”http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js”></script>
</head>
<body>
<div class=”container”>
<h2>Alerts</h2>
<div class=”alert alert-success fade in”>
<a href=”#” class=”close” data-dismiss=”alert” aria-label=”close”>×</a>
<strong>Success!</strong>
</div>
<div class=”alert alert-info fade in”>
<a href=”#” class=”close” data-dismiss=”alert” aria-label=”close”>×</a>
<strong>Info!</strong>
</div>
<div class=”alert alert-warning fade in”>
<a href=”#” class=”close” data-dismiss=”alert” aria-label=”close”>×</a>
<strong>Warning!</strong>
</div>
<div class=”alert alert-danger fade in”>
<a href=”#” class=”close” data-dismiss=”alert” aria-label=”close”>×</a>
<strong>Danger!</strong>
</div>
</div>
</body>
</html>
Output:
Cheers!!!