bootstrap

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

<style>
.page-node .tabs--primary {
  position: fixed;
  left: 0;
  top: 35%;
}
@media (max-width: 767px) {
  .page-node .tabs--primary {
    display: none;
  }
}
.page-node .tabs--primary.nav-tabs > li {
  float: none;
}
.page-node .tabs--primary.nav-tabs > li a {
  border: 1px solid #DDDDDD;
  border-radius: 0;
}
.front .page-header {
  display: none;
}
</style>