<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div class="col-lg-12"> <div class="card my-3"> <div class="card-header"> Bootstrap 4 Multilevel Dropdown Hover <div class="options float-right"> <a class="settings"><i class="fa fa-cog"></i></a> <a href="#" class="collapse"><i class="fa fa-chevron-up"></i></a> <a href="#" class="reload"><i class="fa fa-refresh"></i></a> <a href="#" class="fullscreen"><i class=" fa fa-expand"></i></a> <a href="#" class="remove"><i class="fa fa-times"></i></a> </div> </div> <div class="card-body"> <div class="row"> <div class="col-lg-12"> <div class="btn-group"> <a id="dLabel" role="button" data-toggle="dropdown" class="btn btn-primary dropdown-toggle" href=""> Dropdown </a> <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu"> <li><a class="dropdown-item" href="#">level 1</a></li> <li><a class="dropdown-item" href="#">level 1</a></li> <li class="dropdown-divider"></li> <li class="dropdown-submenu"> <a class="dropdown-item" tabindex="-1" href="#"> level 1 </a> <ul class="dropdown-menu"> <li><a class="dropdown-item" tabindex="-1" href="#">level 2</a></li> <li class="dropdown-submenu"> <a class="dropdown-item" href="#"> level 2 </a> <ul class="dropdown-menu"> <li><a class="dropdown-item" href="#">3rd level</a></li> <li><a class="dropdown-item" href="#">3rd level</a></li> </ul> </li> <li><a class="dropdown-item" href="#">level 2</a></li> <li><a class="dropdown-item" href="#">level 2</a></li> </ul> </li> </ul> </div> </div> </div> </div> </div> </div> </div> </div>

.dropdown-submenu { position: relative; } .dropdown-submenu> a:after { content: ">"; float: right; } .dropdown-submenu>.dropdown-menu { top: 0; left: 100%; margin-top: 0px; margin-left: 0px; } .dropdown-submenu:hover>.dropdown-menu { display: block; }

$(".btn-group, .dropdown").hover( function () { $('>.dropdown-menu', this).stop(true, true).fadeIn("fast"); $(this).addClass('open'); }, function () { $('>.dropdown-menu', this).stop(true, true).fadeOut("fast"); $(this).removeClass('open'); });