<title>Bootstrap 实例</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://cdn.staticfile.net/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.staticfile.net/popper.js/1.15.0/umd/popper.min.js"></script>
<script src="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
<p>以下实例包含了三个选项。最后一个是禁用的:</p>
<label><input type="radio" name="optradio">Option 1</label>
<label><input type="radio" name="optradio">Option 2</label>
<div class="radio disabled">
<label><input type="radio" name="optradio" disabled>Option 3</label>