bootstrap tutorial - How to launch Bootstrap modal on page load - bootstrap examples - bootstrap templates - bootstrap 3
Answer: Use the Bootstrap .modal('show') method
You can use the Bootstrap .modal('show') method for launching the modal window automatically when page load without clicking anything. A common example of this technique is loading the modal when user landed on the home page and requesting them to subscribe the website newsletter. Here's an example:
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Open Bootstrap Modal on Page Load - Wikitechy</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/bootstrap-theme.min.css">
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#myModal").modal('show');
});
</script>
</head>
<body>
<div id="myModal" class="modal fade">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title">Subscribe our Newsletter</h4>
</div>
<div class="modal-body">
<p>Subscribe to our mailing list to get the latest updates straight in your inbox.</p>
<form>
<div class="form-group">
<input type="text" class="form-control" placeholder="Name">
</div>
<div class="form-group">
<input type="email" class="form-control" placeholder="Email Address">
</div>
<button type="submit" class="btn btn-primary">Subscribe</button>
</form>
</div>
</div>
</div>
</div>
</body>
</html>