Drupal 8 System Link Menu

  title: Administration
  route_name: system.admin
  weight: 9
  menu_name: admin

Bootstrap theme menu hover and clickable parent menu

This article show you how config Drupal Bootstrap theme allow show dropdown menu when hover and clickable parent menu

First add this css to your theme css, usually is style.css

@media (min-width: 768px) {
  .dropdown:hover .dropdown-menu {
    display: block;

Second, override theme_menu_link to remove data-toggle