Bootstrap alert-danger class

The alert-danger class in Bootstrap is used to set danger action.

You can try to run the following code to implement the alert-danger class in Bootstrap −

Example

<!DOCTYPE html>
<html>
   <head>
      <title>Bootstrap Example</title>
      <link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet">
      <script src = "/scripts/jquery.min.js"></script>
      <script src = "/bootstrap/js/bootstrap.min.js"></script>
   </head>
   <body>
      <div class = "alert alert-danger">This is danger action!</div>
   </body>
</html>