Dropdowns
Dropdowns are toggleable, contextual overlays for displaying lists of links and more. They’re made interactive with the included dropdown directives.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.
Split button dropdowns
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.
Disabled
Usedisabled attribute on data-toggle="dropdown" to disable the toggle.
Menu alignment
By default, a dropdown menu is automatically positioned 100% from the top and along the left side of its parent. Add class.dropdown-menu-right to a dropdownMenu to right align the dropdown menu.
Dropup variation
Trigger dropdown menus above elements by adding.dropup to the parent element.