Bootstrap 4 按钮 .btn-outline-warning 类
bootstrapweb developmentcss framework
要为按钮设置指示警告的轮廓，您需要使用 Bootstrap 中的 btn-outline 类。
对于我的类，我采用了下面的按钮 −
<button type="button" class="btn btn-outline-warning"> Warning (Errors) </button>
上面的按钮具有 btn-outline-warning 类，允许我们添加橙色轮廓以指示警告操作 −
您可以尝试运行以下代码来实现 btn-outline-warning 类 −
示例
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script> </head> <body> <h2>Warning</h2> <p>The following are the warning messages:</p> <ul class = "list-group"> <li class = "list-group-item">semi-colon (;) missing</li> <li class = "list-group-item">infinite loop</li> </ul> <p>For more warning messages:</p> <button type="button" class="btn btn-outline-warning">Warning (Errors)</button> </body> </html>
