Menu item to be used with wired-menu-bar.
[ This description is mirrored from README.md at github.com/wiredjs/wired-menu-item on 2019-05-10 ]
Menu item to be used with wired-menu-bar. For examples, see wired-menu-bar
Only supports one level of menu item nesting
select - fired when menu item with no children is clicked
open - fired when popup with child items opens
close - fired when popup with child items closes