Initial attempt @ submenu implementation.

src/components/dropdownMenu/DropdownMenuSubTrigger.tsx

@@ -0,0 +1,29 @@
+import * as DropdownMenuPrimitive from "@radix-ui/react-dropdown-menu";
+import React from "react";
+import MenuItemContent from "./DropdownMenuItemContent";
+import { getDropdownMenuItemClassName } from "./common";
+
+const DropdownMenuSubTrigger = ({
+  children,
+  icon,
+  shortcut,
+  className,
+}: {
+  children: React.ReactNode;
+  icon?: JSX.Element;
+  shortcut?: string;
+  className?: string;
+}) => {
+  return (
+    <DropdownMenuPrimitive.SubTrigger
+      className={getDropdownMenuItemClassName(className)}
+    >
+      <MenuItemContent icon={icon} shortcut={shortcut}>
+        {children}
+      </MenuItemContent>
+    </DropdownMenuPrimitive.SubTrigger>
+  );
+};
+
+export default DropdownMenuSubTrigger;
+DropdownMenuSubTrigger.displayName = "DropdownMenuSubTrigger";