<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/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 ----------> <!--mega menu--> <div class="dropdown-container container"> <div class="row"> <div class="col-sm-12 col-md-12 col-lg-6 col-12 d-none d-sm-none d-md-block p-0"> <img src="https://kc-cms-qa-internal.s3.ap-south-1.amazonaws.com/cms/images/Media-20210424192227/1366-450.png" alt="images" class="w-100 h-100"> </div> <div class="col-md-12 col-sm-12 col-lg-6 col-12 p-0"> <div class="dropdown-content"> <div class="row"> <div class="col-sm-12 col-md-6 col-lg-4 text-center"> <h5>Heading1</h5> <ul class="list-links"> <li role="separator" class="divider"></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> </ul> </div> <div class="col-sm-12 col-md-6 col-lg-4 text-center"> <h5>Heading2</h5> <ul class="list-links"> <li role="separator" class="divider"></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> </ul> </div> <div class="col-sm-12 col-md-6 col-lg-4 text-center"> <h5>Heading3</h5> <ul class="list-links"> <li role="separator" class="divider"></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> <li><a href="#">ABC</a></li> </ul> </div> </div> </div> </div> </div> </div> <!--mega-menu-end-->

.dropdown-container { position: absolute; top: 100%; left: 0; right: 0; max-width: 100%; box-shadow: 0 0 25px 0 rgba(0, 0, 0, 0.8); border-radius: 6px; display: none; z-index: 999; } img { border-radius: 6px 0px 0px 6px; } .dropdown-content { padding: 3.71428571em; background: #ffffff; border-radius: 0px 6px 6px 0px; } .header-menu-list .header-menu-list-item:hover .dropdown-container { display: block; transition: all 0.5s ease-in-out; }