shadcn-ui/apps/v4/examples/base/dropdown-menu-with-submenu.tsx

import { Button } from "@/examples/base/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuGroup,
  DropdownMenuItem,
  DropdownMenuPortal,
  DropdownMenuSeparator,
  DropdownMenuShortcut,
  DropdownMenuSub,
  DropdownMenuSubContent,
  DropdownMenuSubTrigger,
  DropdownMenuTrigger,
} from "@/examples/base/ui/dropdown-menu"

export function DropdownMenuWithSubmenu() {
  return (
    <>
      <DropdownMenu>
        <DropdownMenuTrigger
          render={<Button variant="outline" className="w-fit" />}
        >
          Open
        </DropdownMenuTrigger>
        <DropdownMenuContent>
          <DropdownMenuGroup>
            <DropdownMenuItem>Team</DropdownMenuItem>
            <DropdownMenuSub>
              <DropdownMenuSubTrigger>Invite users</DropdownMenuSubTrigger>
              <DropdownMenuPortal>
                <DropdownMenuSubContent>
                  <DropdownMenuItem>Email</DropdownMenuItem>
                  <DropdownMenuItem>Message</DropdownMenuItem>
                  <DropdownMenuSeparator />
                  <DropdownMenuItem>More...</DropdownMenuItem>
                </DropdownMenuSubContent>
              </DropdownMenuPortal>
            </DropdownMenuSub>
            <DropdownMenuItem>
              New Team
              <DropdownMenuShortcut>⌘+T</DropdownMenuShortcut>
            </DropdownMenuItem>
          </DropdownMenuGroup>
        </DropdownMenuContent>
      </DropdownMenu>
    </>
  )
}