---
title: DropdownField
editUrl: https://github.com/Cratis/Components/edit/main/Documentation/CommandForm/dropdown-field.md
description: Bind a string or number property on an Arc command to a single-select dropdown.
---


`DropdownField` renders the renderer-independent Cratis [`Dropdown`](/components/dropdown/) for choosing one value from a list.

## Usage

The excerpt assumes `MyCommand` is a generated command proxy with the bound properties, and `visible` / `setVisible` is component state.

```tsx
import { CommandDialog } from '@cratis/components/CommandDialog';
import { DropdownField } from '@cratis/components/CommandForm';

const statusOptions = [
    { label: 'Active', value: 'active' },
    { label: 'Inactive', value: 'inactive' },
];

<CommandDialog<MyCommand>
    command={MyCommand}
    title='Edit status'
    visible={visible}
    onSuccess={() => setVisible(false)}
    onCancel={() => setVisible(false)}
>
    <DropdownField<MyCommand>
        value={(c) => c.status}
        title='Status'
        options={statusOptions}
        optionLabel='label'
        optionValue='value'
        placeholder='Select a status'
    />
</CommandDialog>;
```

With custom data:

```tsx
const roles = [
    { id: 'admin', display: 'Administrator' },
    { id: 'user', display: 'Standard User' },
];

<DropdownField<MyCommand>
    value={(c) => c.role}
    title='Role'
    options={roles}
    optionLabel='display'
    optionValue='id'
/>;
```

## Props

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `value` | `(instance: TCommand) => unknown` | — | **Required.** Accessor function that returns the bound property from the command instance. Pass the command type as the generic parameter for full type safety. |
| `options` | `Array<{ [key: string]: unknown }>` | — | **Required.** Array of option objects. |
| `optionLabel` | `string` | — | **Required.** Key in each option object to use as the display label. |
| `optionValue` | `string` | — | **Required.** Key in each option object to use as the submitted value. |
| `placeholder` | `string` | — | Placeholder text shown when no value is selected. |
| `className` | `string` | — | Extra CSS class combined with the default `w-full`. |
| `pt` | `DropdownParts` | — | Attributes for the Cratis-owned Dropdown's stable parts. |
| `ptOptions` / `unstyled` | — | — | Retained temporarily for source compatibility; ignored. |

`DropdownField` deliberately does not surface `multiple`, `filter` or `showClear` — use [`MultiSelectField`](/components/commandform/multi-select-field/) for multi-select, or the [`Dropdown`](/components/dropdown/) wrapper directly outside a command form.

Every field also accepts Arc's shared field props, such as `title`, `description`, `initialValue`, and `noInitialValue`, and the accessibility props `id`, `aria-label`, and `aria-describedby`. See [Accessible names and validation errors](/components/commandform/#accessible-names-and-validation-errors).

## Behavior

- Shows an empty string while the bound property is unset. See [Field defaults and command values](/components/commandform/#field-defaults-and-command-values).
- The field spans full width within its container.
- Validation state is reflected through `aria-invalid` and `data-invalid`.