Dropdowns Toggle contextual overlays for displaying lists of links and more with the Bootstrap dropdown plugin.

Basic overview
Dropdowns are toggleable, contextual overlays for displaying lists of links and more. They’re made interactive with the included Bootstrap dropdown JavaScript plugin. They’re toggled by clicking, not by hovering; this is an intentional design decision. Dropdowns are built on a third party library, Popper.js, which provides dynamic positioning and viewport detection.

Find more facts and uses at the bootstrap official documentation.

Kitchen Sink example

A composition of all working elements

Links & buttons

Wrap the dropdown’s toggle (your button or link) and the dropdown menu within .dropdown, or another element that declares position: relative;. Dropdowns can be triggered from <a> or <button> elements to better fit your potential needs.

Multilevel dropdown

Add multilevel menu by wrapping the child node selectors with .dropdown-multilevel, change direction of by adding .dropdown-multilevel-left (right by default)

Content types

Sizing dropdowns

Button dropdowns work with buttons of all sizes, including default and split dropdown buttons

No arrow

Remove directional arrow from dropdown button by adding .no-arrow to .dropdown-toggle

Animated dropdowns

Add animations to dropdowns by adding .dropdown-menu-animated, .fadeup, .fadedown, .faderight, .fadeleft to .dropdown-menu

Directional Arrows

Trigger dropdown menus above elements by adding .dropup, .dropright, and .dropleft to the parent element.

Container examples

You can add any content to dropdown containers and change its width by adding the class .dropdown-sm, .dropdown-md, .dropdown-lg, and .dropdown-xl

Headers examples

Customize .dropdown-header using utility classes. Change backgrounds, colors, and paddings using various helpers

Menu alignment

By default, a dropdown menu is automatically positioned 100% from the top and along the left side of its parent. Add .dropdown-menu-right to a .dropdown-menu to right align the dropdown menu.

Responsive alignment

If you want to use responsive alignment, disable dynamic positioning by adding the 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
Left-aligned but right aligned when large screen
Right-aligned but left aligned when large screen