<!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/3.3.6/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>
</head>
<body>
<div class="container">
<h2>Button Methods</h2>
<p>The <strong>loading</strong> method disables the button and changes the button text to "loading...".</p>
<button type="button" class="btn btn-default">Example Button</button>
</div>
<script>
$(document).ready(function(){
$(".btn").click(function(){
$(this).button('loading');
});
});
</script>
</body>
</html>