[ad_1] https://i.ytimg.com/vi/3PjNwqlJvjc/hqdefault.jpg In this video tutorial, I am going to discuss Bootstrap 4 submenu. We can easily create bootstrap 4 sidebar nav by using some custom CSS. Where I create three layers of the submenu in this sidebar. By using collapse session and toggle function of bootstrap 4 I designed this sidebar or sidenav. Link for download the…