创建一个绿色警报框，指示在Bootstrap中采取了积极的行动
若要创建绿色警报框，指示采取了积极行动，请使用alert-success类。
要实现警报成功类，您需要尝试运行以下代码-
示例
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Example</title>
<link rel = "stylesheet" href = "https://maxcdn.bootstrapcdn.com/bootstrap/4.1.1/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/4.1.1/js/bootstrap.min.js"></script>
</head>
<body>
<div class = "alert alert-success">
<p>Indicates a positive action!</p>
</div>
</body>
</html>