Add a red background color to an element to set danger action with Bootstrap

Use the .btn-danger class to set danger action for a button i.e. red background color to an element.

You can try to run the following code to implement danger action −

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 = "container">
         <button type = "button" class = "btn btn-primary btn-block">Categories</button>
      </div>
      <div class = "container">
         <a href = "#">Tech <span class="badge">95</span></a><br>
         <a href = "#">Entertainment <span class="badge">30</span></a><br>
         <a href = "#">Research <span class="badge">9</span></a><br>
         <a href = "#">Viral <span class="badge">20</span></a><br>
         <a href = "#">Sport <span class="badge">105</span></a>
      </div>
      <div class = "container">
         <br><p>Do not click below:</p>
         <button type = "button" class = "btn btn-danger">Danger</button>
      </div>
   </body>
</html>