如何为仪表板创建多级侧边栏？

Question

I starting am developing bootstrap4. and am trying to make a dashboard. I have found this but it is for bootstrap 3. I understand how to make a side bar with bootstrap but i can not replicate how to do the multi level dropdown that they working in their sidebar. I have tried but not found any how too or snippets. Does anyone know any sources or an explanation on how i reproduce these smooth animations and drop downs in the sidebar?

Answer 1

对于那些感兴趣的人，有一个插件可以帮助允许多个菜单http://mm.onokumus.com/index.html