.btncan be turned into a dropdown toggle with some markup changes. Here’s how you can put them to work with either <button>elements.
.dropdown-toggle-splitfor proper spacing around the dropdown caret.
disabledattribute on data-toggle="dropdown"to disable the toggle.
.dropdown-menu-rightto a dropdownMenuto right align the dropdown menu.
.activeto items in the dropdown to style them as active or add .disabledto items in the dropdown to style them as disabled.