itemsRole property

@override String get itemsRole

The role attribute each menu item should apply.

The role attribute is used for a11y purposes and should be the same for each menu item in a group. For selectable menu items the possible roles are menuitemcheckbox or menuitemradio. https://www.w3.org/TR/wai-aria-1.1/#menuitemradio https://www.w3.org/TR/wai-aria-1.1/#menuitemcheckbox

Implementation

@override
String get itemsRole => selectionModel.isSingleSelect
    ? 'menuitemradio'
    : 'menuitemcheckbox';