<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="note"> <p><b>Note : </b>Make sure you watch this in responsive after 992px it's working after this.</p> </div> <div class="row row-fluid"> <div class="col-xs-12 col-sm-6 col-sm-push-6 col-md-6 col-md-push-0"> <div class="a">A</div> </div> <div class="col-xs-12 col-sm-6 col-sm-pull-6 col-md-6 col-md-pull-0"> <div class="b">B</div> </div> </div> </div><!-- /container -->

.a { background-color: red; height: 200px; text-align: center; line-height: 200px; color: #fff; font-size: 100px; } .b { background-color: green; height: 200px; text-align: center; line-height: 200px; color: #fff; font-size: 100px; }

// no js needed