Description The menu widget adds interactivity to menu elements created with HTML & CSS. Menus present a list of options for the user to choose from as a popup 'attached' to the trigger element. Menus can optionally allow users to check one or more of the options.   Usage The menu widget does not build the menu element itself; it should exist in the page as an HTML element with the appropriate CSS classes already added to it (a decision made so that menus can be accessibl