.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.