<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 ----------> <div class="d-flex bd-highlight"> <div class="p-2 flex-grow-1 bd-highlight">Flex item</div> <div class="p-2 bd-highlight">Flex item</div> <div class="p-2 bd-highlight">Third flex item</div> </div>