How to handle the modal closing event in Twitter Bootstrap?

Last Updated : 03 Jun, 2020

Modal Closing Event in Twitter Bootstrap | Set 1

Prerequisite Knowledge: Bootstrap 4 | Modal

Twitter Bootstrap’s modal class offer a few events that are fired at the standard Bootstrap modal class. Bootstrap Modals offer a lightweight, multi-purpose JavaScript popup that is customizable and responsive. They can be used to display alert popups, videos, and images in a website. Bootstrap Modals are divided into three primary sections: header, body, and footer.

The Bootstrap Events are: show.bs.modal, shown.bs.modal, hide.bs.modal, hidden.bs.modal etc. Out of all these events, we are interested in the hide.bs.modal and hidden.bs.modal events.

hide.bs.modal: This event is fired immediately when the hide instance method has been called.
hidden.bs.modal: This event is fired when the modal has finished being hidden from the user and will then wait for CSS transitions to complete.

Example:

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <!-- Required meta tags -->
    <meta charset="utf-8"> 
    <meta name="viewport" content="width=device-width, 
            initial-scale=1, shrink-to-fit=no"> 
  
    <!-- link to Bootstrap CSS CDN -->
    <link rel="stylesheet" href= 
"https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
        integrity= 
"sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
        crossorigin="anonymous"> 
  
    <title> 
        Modal closing event in Bootstrap 
    </title> 
  
    <style> 
        h1, 
        h6 { 
            margin: 2%; 
        } 
  
        .btn { 
            margin-left: 2%; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1> 
  
        <!-- Button trigger modal -->
        <button type="button" class="btn btn-primary"
            data-toggle="modal" data-target="#gfgModal"> 
            Launch Modal 
        </button> 
  
        <!-- Modal -->
        <div class="modal fade" id="gfgModal" tabindex="-1"
            role="dialog" aria-labelledby="gfgModalLabel"
            aria-hidden="true"> 
            <div class="modal-dialog" role="document"> 
                <div class="modal-content"> 
                    <div class="modal-header"> 
                        <h6 class="modal-title" 
                                id="gfgModalLabel" 
                                style="color:green;"> 
                            GeeksforGeeks 
                        </h6> 
                          
                        <!-- The title of the modal -->
                        <button type="button" class="close" 
                                data-dismiss="modal" 
                                aria-label="Close"> 
                            <span aria-hidden="true">×</span> 
                        </button> 
                    </div> 
  
                    <div class="modal-body"> 
  
                        <!-- The content inside the modal box -->
                          
<p> 
                            Articles that need little modification/ 
                            improvement from reviewers are published  
                            first. To quickly get your articles  
                            reviewed, please refer existing articles,  
                            their formating style, coding style, and 
                            try to make your close to them. 
                        </p> 
  
                    </div> 
                    <div class="modal-footer"> 
                        <button type="button" class="btn btn-secondary"
                                data-dismiss="modal">Close</button> 
  
                        <!-- The close button in the bottom 
                             of the modal -->
                        <button type="button" class="btn btn-primary"> 
                            okay 
                        </button> 
                        <!-- The save changes button in  
                            the bottom of the modal -->
                    </div> 
                </div> 
            </div> 
        </div> 
  
        <!-- Optional JavaScript -->
        <!-- jQuery first, then Popper.js, then Bootstrap JS -->
        <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
            integrity= 
"sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
            crossorigin="anonymous"> 
        </script> 
          
        <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
            integrity= 
"sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" 
            crossorigin="anonymous"> 
        </script> 
          
        <script src= 
"https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
            integrity= 
"sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
            crossorigin="anonymous"> 
        </script> 
    </center> 
  
    <!-- Modal JQUERY logic -->
    <script type="text/javascript"> 
        $('#gfgModal').on('hidden.bs.modal', function (e) { 
  
            // Fire a function in the console 
            console.log('Function executed when gfgModal closed'); 
              
            // Alert the user 
            alert('Alert fired when gfgModal closed') 
        }) 
    </script> 
</body> 
  
</html>