Bootstrap 4 .card-body类
要设置Bootstrap卡的容器，您需要使用card-body类。它允许您添加内容
以下是卡体类-
<div class="card-body"> Body of the card </div>
并在卡类中设置以上内容，如以下代码片段所示：
<div class="card"> <div class="card-body">Body of the card.</div> </div>
您可以尝试运行以下代码来实现card-body类-
示例
<!DOCTYPE html>
<html lang="en">
<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>Heading Three</h3>
<div class="card">
<div class="card-body">Body of the card.</div>
</div>
</div>
</body>
</html>