Normalize checkable items so every menuitemcheckbox/menuitemradio carries an explicit aria-checked (defaulting to false), as the role requires, and take every item out of the sequential tab order.
menuitemcheckbox
menuitemradio
aria-checked
false
Normalize checkable items so every
menuitemcheckbox/menuitemradiocarries an explicitaria-checked(defaulting tofalse), as the role requires, and take every item out of the sequential tab order.