Read the step-by-step guide here: https://blog.logrocket.com/creating-multilevel-dropdown-menu-react/

You can download or clone this project by running this command from your terminal:

git clone https://github.com/Ibaslogic/react-multilevel-dropdown-menu 

Then:

cd react-multilevel-dropdown-menu npm install npm start 

You should see the app in your browser address bar at http://localhost:3000