# Combobox.InputOptions

Inputs accepted by Combobox.Input in addition to the shared DOM host options.

## Signatures

```ts
export interface InputOptions extends Dom.HostOptions<HTMLInputElement> {
    readonly state: RefSubject.HydratedRefSubject<State, Schema.SchemaError>;
    readonly collection?: RefSubject.RefSubject<Collection.State<string>>;
    readonly placeholder?: string;
}
```

## Property: collection

Item registry used for collection-driven keyboard behavior and mounted ordering.

## Property: placeholder

Native input placeholder text.

## Property: state

Renderer-independent RefSubject state consumed by this component or operation.