Dropdowns
Examples
Toggle contextual overlays for displaying lists of links and more with the Bootstrap dropdown plugin.
Single button dropdowns
                                                        Any single .btn can be turned into a dropdown
                                                        toggle with some markup changes. Here’s how you can put them to work
                                                        with either <button>
                                                        elements:
                                                    
Variant
The best part is you can do this with any button variant, too:
Dropend variation
                                                        Trigger dropdown menus at the right of the elements by adding .dropend to the parent element.
                                                    
Dropup variation
                                                        Trigger dropdown menus above elements
                                                        by adding .dropup to the parent
                                                        element.
                                                    
Active Item
                                                        Add .active to item in the dropdown to style them as active.
                                                    
Headers
Add a header to label sections of actions in any dropdown menu.
Forms
Put a form within a dropdown menu, or make it into a dropdown menu, and use margin or padding utilities to give it the negative space you require.
Split button dropdowns
                                                        Similarly, create split button dropdowns with virtually the same markup as single button dropdowns, but with the addition of .dropdown-toggle-split for proper spacing around the dropdown caret.
                                                    
Sizing
Button dropdowns work with buttons of all sizes, including default and split dropdown buttons.
Dropstart variation
                                                        Trigger dropdown menus at the right of the elements by adding .dropstart to the parent element.
                                                    
Menu alignment
                                                        Add .dropdown-menu-end
                                                        to a .dropdown-menu to right
                                                        align the dropdown menu.
                                                    
Disabled Item
                                                        Add .disabled to items in the dropdown to style them as disabled.
                                                    
Text
Place any freeform text within a dropdown menu with text and use spacing utilities. Note that you’ll likely need additional sizing styles to constrain the menu width.
 
                                                 
                                                 
                                                 
                                                 
                                                 
                                                 
                             
  
  
  
  
  
  
                                 
                                
                             
                                
                             
                             
                             
                                     
                                     
                                     
                                     
                                    