<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 ----------> onclick addclass in function angular 6 on ts file example layout.components isShowDiv = true; toggleDisplayDivshow() { this.isShowDiv = !this.isShowDiv; } toggleDisplayDivhide() { this.isShowDiv = !this.isShowDiv; } html part <li> <span class="side-nav" (click)=toggleDisplayDivshow()> <i class=" fa fa-bars baar"></i> </span> <!--sidebar--> <div class="side-menu text-center" [hidden]="isShowDiv" [ngClass]="isShowDiv ? '' : 'menu-effect'"> //close btn simple <a href="javascript:void(0) " class="closebtn" (click)=toggleDisplayDivhide()>×</a> <ul class="menu-vertical"> <li class="menu-item"> <a href="">My Karma</a> </li> </ul> </div> <!--sidebar-end--> </li> angular function add ts file example layout.components <script> $(document).ready(function() { $(".menu-text").click(function() { $(".select-language").slideToggle(1000); }); }); </script> $(document).on('click', '.side-nav', function () { $('.side-menu').show() }) $(document).on('click', '.side-menu', function () { $(this).hide() })