对Bootstrap 4卡采取积极的行动
要对Bootstrap中的卡设置肯定/成功操作，请使用card-success类。
在这里，我已经设置了牌成功类，就像我们在<div>这样的任何元素上设置类一样。
<div class="card bg-success text-white"> <div class="card-body">Deal!</div> </div>
以相同的方式，设置其他成功消息-
<div class="card bg-success text-white"> <div class="card-body">Task complete!</div> </div>
让我们在Bootstrap4卡上实现成功操作-
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://cdn.staticfile.org/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>
<div class="container">
<h3>Success Messages</h3>
<div class="card bg-success text-white">
<div class="card-body">Deal!</div>
</div><br>
<div class="card bg-success text-white">
<div class="card-body">Cleared the 2nd round!</div>
</div><br>
<div class="card bg-success text-white">
<div class="card-body">Victory!</div>
</div><br>
<div class="card bg-success text-white">
<div class="card-body">Task complete!</div>
</div>
</div>
</body>
</html>