# @fayegram-ai/faye-ui/controls/combobox

Public exports and dependency-resolved component properties, with usage and rendering guidance.

## Import

```tsx
import { Combobox } from '@fayegram-ai/faye-ui/controls/combobox';
```

[Usage and behavior guide](/docs/pickers/) · [API JSON](/api/packages/controls/combobox.json)

This entry declares a client boundary. Follow the rendering guide for framework integration.

## Public exports

| Name | Kind | Resolved declaration type |
|---|---|---|
| `Combobox` | value | `{ readonly Root: typeof Base.Root; readonly List: import("react").ForwardRefExoticComponent<Omit<import("@base-ui/react").AutocompleteListProps, "ref"> & import("react").RefAttributes<HTMLDivElement>>; readonly Collection: typeof Base.Collection; readonly Value: typeof Base.Value; readonly useFilter: typeof Base.useFilter; readonly Label: { (input: Omit<import("@base-ui/react").ComboboxLabelProps, "ref"> & import("react").RefAttributes<HTMLDivElement> & { variants?: { readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVa… (full type in API JSON)` |

## Combobox

Public component; use the linked family guide for complete composition and behavior.

Dependency-resolved declaration properties. Common React/native HTML attributes are omitted from the table; use the full declaration and React/native references. Generic and union restrictions remain authoritative in TypeScript.

### Combobox.Root

| Property | Required | Type | Meaning |
|---|---|---|---|
| `actionsRef` | No | `React.RefObject<AriaCombobox.Actions \| null> \| undefined` | A ref to imperative actions. - `unmount`: Manually unmounts the combobox. Call this after any externally controlled closing animation finishes. |
| `autoComplete` | No | `string \| undefined` | Provides a hint to the browser for autofill. |
| `autoHighlight` | No | `boolean \| undefined` | Whether the first matching item is highlighted automatically while filtering. |
| `children` | No | `React.ReactNode` | See the usage contract and declaration. |
| `defaultInputValue` | No | `string \| number \| readonly string[] \| undefined` | The uncontrolled input value when initially rendered. To render a controlled input, use the `inputValue` prop instead. |
| `defaultOpen` | No | `boolean \| undefined` | Whether the popup is initially open. To render a controlled popup, use the `open` prop instead. |
| `defaultValue` | No | `ComboboxValueType<Value, Multiple> \| null \| undefined` | The uncontrolled selected value of the combobox when it's initially rendered. To render a controlled combobox, use the `value` prop instead. |
| `disabled` | No | `boolean \| undefined` | Whether the component should ignore user interaction. |
| `filter` | No | `((item: Item, query: string, itemToString?: ((item: Item) => string) \| undefined) => boolean) \| null \| undefined` | Filter function used to match items vs input query. Receives the source item, which is the derived value's item when `items` is a `createItems()` collection, and the item itself otherwise. |
| `filteredItems` | No | `readonly Item[] \| readonly Group<Item>[] \| undefined` | Filtered items to display in the list. When provided, the list uses these items instead of filtering the `items` prop internally. When `items` is also provided, this array must preserve its flat or grouped structure. With a `createItems()` collection, pass source items rather than derived values. Nullish entries are not supported, as in `items`. Use when you want to control filtering logic externally with the `useFilter()` hook. |
| `form` | No | `string \| undefined` | Identifies the form that owns the internal input. Useful when the combobox is rendered outside the form. |
| `grid` | No | `boolean \| undefined` | Whether list items are presented in a grid layout. When enabled, arrow keys navigate across rows and columns inferred from DOM rows. |
| `highlightItemOnHover` | No | `boolean \| undefined` | Whether moving the pointer over items should highlight them. Disabling this prop allows CSS `:hover` to be differentiated from the `:focus` (`data-highlighted`) state. |
| `id` | No | `string \| undefined` | The id of the component. |
| `inline` | No | `boolean \| undefined` | Whether the list is rendered inline without using the component's own popup. Specify `open` unconditionally in conjunction with this prop so the list is considered visible: `<Combobox.Root inline open>` In a `Combobox.Root` > `Dialog.Root` composition, bind the Combobox's `open` and `onOpenChange` props to the `Dialog`'s `open` and `onOpenChange` state instead so the component resets its transient state (filter query, highlighted item, and input value) when the dialog closes. |
| `inputRef` | No | `React.Ref<HTMLInputElement> \| undefined` | A ref to the hidden input element. |
| `inputValue` | No | `string \| number \| readonly string[] \| undefined` | The input value of the combobox. Use when controlled. |
| `isItemEqualToValue` | No | `((itemValue: Value, value: Value) => boolean) \| undefined` | Custom comparison logic used to determine if a combobox item value matches the current selected value. Useful when item values are objects without matching referentially. With a `createItems()` collection, both arguments are derived values. Defaults to `Object.is` comparison. |
| `items` | No | `readonly any[] \| readonly Group<any>[] \| ComboboxItemCollection<Item, Value> \| undefined` | The items to be displayed in the list. Can be a flat array of items, an array of groups with items, or a collection created by the `createItems()` function, which derives each item's selection value and label. Nullish entries are not supported: remove them from the data before passing it. |
| `itemToStringLabel` | No | `((itemValue: Value) => string) \| undefined` | When the item values are objects (`<Combobox.Item value={object}>`), this function converts the object value to a string representation for display in the input. If the shape of the object is `{ value, label }`, the label will be used automatically without needing to specify this prop. With a `createItems()` collection, this receives the derived value, and the collection's `getLabel` takes precedence for values it can resolve. |
| `itemToStringValue` | No | `((itemValue: Value) => string) \| undefined` | When the item values are objects (`<Combobox.Item value={object}>`), this function converts the object value to a string representation for form submission. If the shape of the object is `{ value, label }`, the value will be used automatically without needing to specify this prop. With a `createItems()` collection, this receives the derived value. |
| `limit` | No | `number \| undefined` | The maximum number of items to display in the list. |
| `locale` | No | `Intl.LocalesArgument` | The locale to use for string comparison. Defaults to the user's runtime locale. |
| `loopFocus` | No | `boolean \| undefined` | Whether to loop keyboard focus back to the input when the end of the list is reached while using the arrow keys. The first item can then be reached by pressing <kbd>ArrowDown</kbd> again from the input, or the last item can be reached by pressing <kbd>ArrowUp</kbd> from the input. The input is always included in the focus loop per [ARIA Authoring Practices](https://www.w3.org/WAI/ARIA/apg/patterns/combobox/). When disabled, focus does not move when on the last element and the user presses <kbd>ArrowDown</kbd>, or when on the first element and the user presses <kbd>ArrowUp</kbd>. |
| `modal` | No | `boolean \| undefined` | Determines if the popup enters a modal state when open. - `true`: user interaction is limited to the popup: document page scroll is locked and pointer interactions on outside elements are disabled. - `false`: user interaction with the rest of the document is allowed. On touch devices, a `true` modal blocks outside taps but leaves the page scrollable unless the popup spans nearly the full viewport width, matching native iOS behavior. |
| `multiple` | No | `Multiple \| undefined` | Whether multiple items can be selected. |
| `name` | No | `string \| undefined` | Identifies the field when a form is submitted. |
| `onInputValueChange` | No | `((inputValue: string, eventDetails: ComboboxRoot.ChangeEventDetails) => void) \| undefined` | Event handler called when the input value changes. |
| `onItemHighlighted` | No | `((highlightedValue: Value \| undefined, eventDetails: ComboboxRoot.HighlightEventDetails) => void) \| undefined` | Callback fired when an item is highlighted or unhighlighted. Receives the highlighted item value (or `undefined` if no item is highlighted) and event details with a `reason` property describing why the highlight changed. The `reason` can be: - `'keyboard'`: the highlight changed due to keyboard navigation. - `'pointer'`: the highlight changed due to pointer hovering. - `'none'`: the highlight changed programmatically. |
| `onOpenChange` | No | `((open: boolean, eventDetails: ComboboxRoot.ChangeEventDetails) => void) \| undefined` | Event handler called when the popup is opened or closed. |
| `onOpenChangeComplete` | No | `((open: boolean) => void) \| undefined` | Event handler called after any animations complete when the popup is opened or closed. |
| `onValueChange` | No | `((value: ComboboxValueType<Value, Multiple> \| (Multiple extends true ? never : null), eventDetails: ComboboxRoot.ChangeEventDetails) => void) \| undefined` | Event handler called when the selected value of the combobox changes. |
| `open` | No | `boolean \| undefined` | Whether the popup is currently open. Use when controlled. |
| `openOnInputClick` | No | `boolean \| undefined` | Whether the popup opens when clicking the input. |
| `readOnly` | No | `boolean \| undefined` | Whether the user should be unable to choose a different option from the popup. |
| `required` | No | `boolean \| undefined` | Whether the user must choose a value before submitting a form. |
| `value` | No | `ComboboxValueType<Value, Multiple> \| null \| undefined` | The selected value of the combobox. Use when controlled. |
| `virtualized` | No | `boolean \| undefined` | Whether the items are being externally virtualized. |

### Combobox.List

| Property | Required | Type | Meaning |
|---|---|---|---|
| `children` | No | `ReactNode \| ((item: any, index: number) => React.ReactNode)` | See the usage contract and declaration. |
| `className` | No | `string \| ((state: ComboboxListState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxListState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxListState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |

### Combobox.Collection

| Property | Required | Type | Meaning |
|---|---|---|---|
| `children` | Yes | `(item: any, index: number) => React.ReactNode` | See the usage contract and declaration. |

### Combobox.Value

| Property | Required | Type | Meaning |
|---|---|---|---|
| `children` | No | `React.ReactNode \| ((selectedValue: any) => React.ReactNode)` | Accepts a function that returns a `ReactNode` to format the selected value. Treat the value as read-only: in `multiple` mode it may be a shared frozen array when nothing is selected. |
| `placeholder` | No | `React.ReactNode` | The placeholder value to display when no value is selected. This is overridden by `children` if specified, or by a null item's label in `items`. |

### Combobox.Label

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxLabelState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxLabelState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxLabelState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Input

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxInputState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `disabled` | No | `boolean \| undefined` | Whether the component should ignore user interaction. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxInputState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxInputState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.InputGroup

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxInputGroupState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxInputGroupState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxInputGroupState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Trigger

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxTriggerState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `disabled` | No | `boolean \| undefined` | Whether the component should ignore user interaction. |
| `nativeButton` | No | `boolean \| undefined` | Whether the component renders a native `<button>` element when replacing it via the `render` prop. Set to `false` if the rendered element is not a button (for example, `<div>`). |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxTriggerState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxTriggerState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Clear

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxClearState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `disabled` | No | `boolean \| undefined` | Whether the component should ignore user interaction. |
| `keepMounted` | No | `boolean \| undefined` | Whether the component should remain mounted in the DOM when not visible. |
| `nativeButton` | No | `boolean \| undefined` | Whether the component renders a native `<button>` element when replacing it via the `render` prop. Set to `false` if the rendered element is not a button (for example, `<div>`). |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxClearState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxClearState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Icon

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxIconState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxIconState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxIconState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Positioner

| Property | Required | Type | Meaning |
|---|---|---|---|
| `align` | No | `Align \| undefined` | How to align the popup relative to the specified side. |
| `alignOffset` | No | `number \| OffsetFunction \| undefined` | Additional offset along the alignment axis in pixels. Also accepts a function that returns the offset to read the dimensions of the anchor and positioner elements, along with its side and alignment. The function takes a `data` object parameter with the following properties: - `data.anchor`: the dimensions of the anchor element with properties `width` and `height`. - `data.positioner`: the dimensions of the positioner element with properties `width` and `height`. - `data.side`: which side of the anchor element the positioner is aligned against. - `data.align`: how the positioner is aligned relative to the specified side. |
| `anchor` | No | `Element \| VirtualElement \| RefObject<Element \| null> \| (() => Element \| VirtualElement \| null) \| null \| undefined` | An element to position the popup against. By default, the popup will be positioned against the trigger. |
| `arrowPadding` | No | `number \| undefined` | Minimum distance to maintain between the arrow and the edges of the popup. Use it to prevent the arrow element from hanging out of the rounded corners of a popup. |
| `className` | No | `string \| ((state: ComboboxPositionerState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `collisionAvoidance` | No | `CollisionAvoidance \| undefined` | Determines how to handle collisions when positioning the popup. `side` controls overflow on the preferred placement axis (`top`/`bottom` or `left`/`right`): - `'flip'`: keep the requested side when it fits; otherwise try the opposite side (`top` and `bottom`, or `left` and `right`). - `'shift'`: never change side; keep the requested side and move the popup within the clipping boundary so it stays visible. - `'none'`: do not correct side-axis overflow. `align` controls overflow on the alignment axis (`start`/`center`/`end`): - `'flip'`: keep side, but swap `start` and `end` when the requested alignment overflows. - `'shift'`: keep side and requested alignment, then nudge the popup along the alignment axis to fit. - `'none'`: do not correct alignment-axis overflow. `fallbackAxisSide` controls fallback behavior on the perpendicular axis when the preferred axis cannot fit: - `'start'`: allow perpendicular fallback and try the logical start side first (`top` before `bottom`, or `left` before `right` in LTR). - `'end'`: allow perpendicular fallback and try the logical end side first (`bottom` before `top`, or `right` before `left` in LTR). - `'none'`: do not fallback to the perpendicular axis. When `side` is `'shift'`, explicitly setting `align` only supports `'shift'` or `'none'`. If `align` is omitted, it defaults to `'flip'`. |
| `collisionBoundary` | No | `Boundary \| undefined` | An element or a rectangle that delimits the area that the popup is confined to. |
| `collisionPadding` | No | `Padding \| undefined` | Additional space to maintain from the edge of the collision boundary. |
| `disableAnchorTracking` | No | `boolean \| undefined` | Whether to disable the popup from tracking any layout shift of its positioning anchor. |
| `positionMethod` | No | `"absolute" \| "fixed" \| undefined` | Determines which CSS `position` property to use. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxPositionerState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `side` | No | `Side \| undefined` | Which side of the anchor element to align the popup against. May automatically change to avoid collisions. |
| `sideOffset` | No | `number \| OffsetFunction \| undefined` | Distance between the anchor and the popup in pixels. Also accepts a function that returns the distance to read the dimensions of the anchor and positioner elements, along with its side and alignment. The function takes a `data` object parameter with the following properties: - `data.anchor`: the dimensions of the anchor element with properties `width` and `height`. - `data.positioner`: the dimensions of the positioner element with properties `width` and `height`. - `data.side`: which side of the anchor element the positioner is aligned against. - `data.align`: how the positioner is aligned relative to the specified side. |
| `sticky` | No | `boolean \| undefined` | Whether to maintain the popup in the viewport after the anchor element was scrolled out of view. |
| `style` | No | `CSSProperties \| ((state: ComboboxPositionerState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Popup

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxPopupState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `finalFocus` | No | `boolean \| RefObject<HTMLElement \| null> \| ((closeType: InteractionType) => void \| boolean \| HTMLElement \| null) \| undefined` | Determines the element to focus when the popup is closed. - `false`: Do not move focus. - `true`: Move focus based on the default behavior (trigger or previously focused element). - `RefObject`: Move focus to the ref element. - `function`: Called with the interaction type (`mouse`, `touch`, `pen`, or `keyboard`). Return an element to focus, `true` to use the default behavior, or `false`/`undefined` to do nothing. |
| `initialFocus` | No | `boolean \| RefObject<HTMLElement \| null> \| ((openType: InteractionType) => void \| boolean \| HTMLElement \| null) \| undefined` | Determines the element to focus when the popup is opened. - `false`: Do not move focus. - `true`: Move focus based on the default behavior (first tabbable element or popup). - `RefObject`: Move focus to the ref element. - `function`: Called with the interaction type (`mouse`, `touch`, `pen`, or `keyboard`). Return an element to focus, `true` to use the default behavior, or `false`/`undefined` to do nothing. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxPopupState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxPopupState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Item

| Property | Required | Type | Meaning |
|---|---|---|---|
| `children` | No | `ReactNode` | See the usage contract and declaration. |
| `className` | No | `string \| ((state: ComboboxItemState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `disabled` | No | `boolean \| undefined` | Whether the component should ignore user interaction. |
| `index` | No | `number \| undefined` | The index of the item in the list. Improves performance when specified by avoiding the need to calculate the index automatically from the DOM. |
| `nativeButton` | No | `boolean \| undefined` | Whether the component renders a native `<button>` element when replacing it via the `render` prop. Set to `true` if the rendered element is a native button. |
| `onClick` | No | `((event: BaseUIEvent<MouseEvent<HTMLDivElement, MouseEvent>>) => void) \| undefined` | An optional click handler for the item when selected. It fires when clicking the item with the pointer, as well as when pressing `Enter` with the keyboard if the item is highlighted when the `Input` or `List` element has focus. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxItemState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxItemState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `value` | No | `any` | A unique value that identifies this item. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.ItemIndicator

| Property | Required | Type | Meaning |
|---|---|---|---|
| `children` | No | `ReactNode` | See the usage contract and declaration. |
| `className` | No | `string \| ((state: ComboboxItemIndicatorState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `keepMounted` | No | `boolean \| undefined` | Whether to keep the HTML element in the DOM when the item is not selected. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxItemIndicatorState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxItemIndicatorState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Group

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxGroupState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `items` | No | `readonly any[] \| undefined` | Items to be rendered within this group. When provided, child `Collection` components will use these items. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxGroupState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxGroupState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.GroupLabel

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxGroupLabelState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxGroupLabelState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxGroupLabelState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Chips

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxChipsState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxChipsState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxChipsState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Chip

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxChipState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxChipState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxChipState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.ChipRemove

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxChipRemoveState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `nativeButton` | No | `boolean \| undefined` | Whether the component renders a native `<button>` element when replacing it via the `render` prop. Set to `false` if the rendered element is not a button (for example, `<div>`). |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxChipRemoveState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxChipRemoveState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Empty

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxEmptyState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxEmptyState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxEmptyState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Status

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxStatusState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxStatusState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxStatusState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Row

**Example disposition:** Optional grid-list composition requiring root grid mode and explicit rows. Flat and grouped selection are demonstrated; two-dimensional arrow navigation remains a distinct coverage limit, not a completed visual scenario.

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxRowState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxRowState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxRowState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |
| `variants` | No | `{ readonly variant?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "variant"> \| undefined; readonly size?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "size"> \| undefined; readonly tone?: import("@fayegram-ai/faye-ui/contracts/visual-variants").VisualVariant<"combobox", "tone"> \| undefined; } \| undefined` | See the usage contract and declaration. |

### Combobox.Portal

| Property | Required | Type | Meaning |
|---|---|---|---|
| `className` | No | `string \| ((state: ComboboxPortalState) => string \| undefined) \| undefined` | CSS class applied to the element, or a function that returns a class based on the component's state. |
| `container` | No | `HTMLElement \| ShadowRoot \| RefObject<HTMLElement \| ShadowRoot \| null> \| null \| undefined` | A parent element to render the portal element into. |
| `keepMounted` | No | `boolean \| undefined` | Whether to keep the portal mounted in the DOM while the popup is hidden. |
| `render` | No | `ReactElement<unknown, string \| JSXElementConstructor<any>> \| ComponentRenderFn<HTMLProps, ComboboxPortalState> \| undefined` | Allows you to replace the component's HTML element with a different tag, or compose it with another component. Accepts a `ReactElement` or a function that returns the element to render. |
| `style` | No | `CSSProperties \| ((state: ComboboxPortalState) => React.CSSProperties \| undefined) \| undefined` | Style applied to the element, or a function that returns a style object based on the component's state. |

## Defaults and customization

Descriptor defaults: `{"size":"md","tone":"neutral","variant":"outline"}`. Parts: `label`, `input`, `input-group`, `trigger`, `clear`, `icon`, `positioner`, `popup`, `item`, `item-indicator`, `group`, `group-label`, `chips`, `chip`, `chip-remove`, `empty`, `status`, `row`. Explicit instance props take precedence over configured defaults.

Use semantic tokens, public part hooks and customization sheets. Keep visual configuration separate from application state.

## State, events and accessibility

For interactive controls, pair a controlled value/open prop with its corresponding change callback; default props initialize uncontrolled state. Keep application validation and submission policy explicit. Name controls with visible labels, name icon-only actions on the button, and preserve focus and dismissal behavior when replacing parts. Use native form names and submit/reset types where supported. See the usage guide for component-specific behavior and live examples.

## Declaration authority

Generated from `packages/faye-ui/dist/controls/combobox.d.ts` after the semantic package build. Common native/React attributes are intentionally omitted from property tables. Generic overloads, discriminated unions and complete inherited attributes remain authoritative in installed TypeScript declarations. [React DOM attributes](https://react.dev/reference/react-dom/components/common) and [Base UI component contracts](https://base-ui.com/react/overview/quick-start) describe the inherited foundations.