.dropdown, or another element that declares position: relative;. Dropdowns can be triggered from <a> or <button> elements to better fit your potential needs.
.dropdown-multilevel, change direction of by adding .dropdown-multilevel-left (right by default)
.no-arrow to .dropdown-toggle
.dropdown-menu-animated, .fadeup, .fadedown, .faderight, .fadeleft to .dropdown-menu
.dropup, .dropright, and .dropleft to the parent element.
.dropdown-sm, .dropdown-md, .dropdown-lg, and .dropdown-xl
.dropdown-header using utility classes. Change backgrounds, colors, and paddings using various helpers
.dropdown-menu-right to a .dropdown-menu to right align the dropdown menu.
data-display="static" attribute and use the responsive variation classes. To align left/right the dropdown menu with the given breakpoint or larger, add .dropdown-menu{-sm|-md|-lg|-xl}-right or .dropdown-menu{-sm|-md|-lg|-xl}-left