The command identifier that the menu item sends when activated.
- Safari Desktop 5.1+
- Safari Extensions JS
submenu property is
null, setting the value of this property to
undefined, or the empty string has no effect.
submenu property is defined, validate events are sent using the value of this property; if this property is blank, events are sent using the menu item’s identifier.
Changes made to the
command property take effect immediately, regardless of visibility.