Bootstrap .btn-group- *类的用法
要了解.btn-group-*类的用法，您可以尝试运行以下代码：
示例
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Example</title>
<link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet">
<script src = "/scripts/jquery.min.js"></script>
<script src = "/bootstrap/js/bootstrap.min.js"></script>
</head>
<body style = "background: orange;">
<div class = "btn-group btn-group-lg">
<button type = "button" class = "btn btn-default">One</button>
<button type = "button" class = "btn btn-default">Two</button>
</div>
<div class = "btn-group btn-group-sm">
<button type = "button" class = "btn btn-default">Three</button>
<button type = "button" class = "btn btn-default">Four</button>
</div>
<div class = "btn-group btn-group-xs">
<button type = "button" class = "btn btn-default">Five</button>
<button type = "button" class = "btn btn-default">Six</button>
</div>
</body>
</html>