> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/mui/base-ui/llms.txt
> Use this file to discover all available pages before exploring further.

# Menubar

> API reference for the Menubar component

# Menubar

A horizontal menu of items that trigger dropdown menus.

## Import

```tsx theme={null}
import * as Menubar from '@base-ui/react/menubar';
```

## Menubar.Root

Groups all menubar items.

### Props

<ParamField name="orientation" type="'horizontal' | 'vertical'" default="horizontal">
  The orientation of the menubar.
</ParamField>

<ParamField name="loopFocus" type="boolean" default="true">
  Whether keyboard navigation should loop from the last item back to the first.
</ParamField>

## Menubar.Menu

A menu within the menubar.

### Props

<ParamField name="open" type="boolean">
  Whether the menu is currently open.
</ParamField>

<ParamField name="onOpenChange" type="(open: boolean) => void">
  Event handler called when the menu is opened or closed.
</ParamField>

## Menubar.Trigger

The button that opens a menu.

## Menubar.Portal

Portals the menu popup to a different part of the DOM.

## Menubar.Positioner

Positions the menu popup.

## Menubar.Popup

The popup that contains the menu items.

## Menubar.Item

An item in the menu.

## Menubar.Group

Groups related menu items.

## Menubar.GroupLabel

Labels a group of menu items.

## Menubar.Submenu

A nested menu.

## Menubar.SubmenuTrigger

The item that opens a submenu.

## Menubar.RadioGroup

Groups menu items that function as radio buttons.

## Menubar.RadioItem

A menu item that acts as a radio button.

## Menubar.CheckboxItem

A menu item that acts as a checkbox.

## Menubar.Arrow

An optional arrow element.