The .alert-success class in Bootstrap indicates a positive action.
You can try to run the following code to implement the alert-success class in Bootstrap −
<!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-success alert-dismissable"> <button type = "button" class = "close" data-dismiss = "alert" aria-hidden = "true"> × </button> Success! </div> </body> </html>