简单教程
提交运行
代码编辑器：
<meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/static/lib/bootstrap/4.0.0/css/bootstrap.min.css"> <div class="container"> <h2>按钮设置边框</h2> <button type="button" class="btn btn-outline-primary">主要按钮</button> <button type="button" class="btn btn-outline-secondary">次要按钮</button> <button type="button" class="btn btn-outline-success">成功</button> <button type="button" class="btn btn-outline-info">信息</button> <button type="button" class="btn btn-outline-warning">警告</button> <button type="button" class="btn btn-outline-danger">危险</button> <button type="button" class="btn btn-outline-dark">黑色</button> <button type="button" class="btn btn-outline-light text-dark">浅色</button> </div>
运行结果：