<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="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <iframe style="width:100vw; height:100vw" src="https://latifur.github.io/Simple-Sidenav/Sidenav/"></iframe> <p class="sr-only">to get the code download from my github repository "https://github.com/latifur/Simple-Sidenav" </p>