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Dropdowns present a list of options that can be used to filter or sort existing content.


  • The element that opens the menu has role button.
  • The element with role button has aria-haspopup set to either menu or true.
  • When the menu is displayed, the element with role button has aria-expanded set to true. When the menu is hidden, it is recommended that aria-expanded is not present. If aria-expanded is specified when the menu is hidden, it is set to false .
  • The element that contains the menu items displayed by activating the button has role menu.
  • Optionally, the element with role button has a value specified for aria-controls that refers to the element with role menu.
  • With focus on the button, Enter or Space opens the menu and places focus on the first menu item. Up and down arrows move focus through menu items.
  • Pressing Escape closes the menu and returns focus to the button.

Modus Bootstrap

The WAI ARIA standard defines an actual role="menu" widget, but this is specific to application-like menus which trigger actions or functions. ARIA menus can only contain menu items, checkbox menu items, radio button menu items, radio button groups, and sub-menus.

Modus Bootstrap’s dropdowns, on the other hand, are designed to be generic and applicable to a variety of situations and markup structures. For instance, it is possible to create dropdowns that contain additional inputs and form controls, such as search fields or login forms. For this reason, Modus Bootstrap does not expect (nor automatically add) any of the role and aria- attributes required for true ARIA menus. Authors will have to include these more specific attributes themselves.