<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css">
<script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script>
<script src="https://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Button</h2>
<p>The disabled attribute makes the button disabled:</p>
<button type="button" class="btn btn-default" disabled="disabled">Disabled default button</button>
<br><br>
<p>The .disabled class makes the link button disabled:</p>
<a href="#" class="btn btn-info disabled" role="button">Disabled info link</a>
</div>
</body>
</html>