SplitButton
A button with a main action and a menu of related ones.
Basic
The main button runs clicked; the arrow opens the menu (itemSelected). Arrow Down on the arrow opens it from the keyboard.
Severities
severity follows the button colours.
Variants
outlined, text, raised and rounded work as on a button.
Sizes
size sets both parts.
Nested
Nested items open as sub-menus; menuAriaLabel names the arrow button and the menu.
Disabled
disabled turns off both parts, menuDisabled only the arrow; loading shows a spinner in the main button.
Design tokens
dt changes the divider between the filled parts; the buttons and the menu keep their own tokens.