# ItemOptions

Inputs accepted by Tree.Item in addition to the shared DOM host options.

## Signatures

```ts
export interface ItemOptions extends Dom.HostOptions<HTMLDivElement> {
    readonly state: RefSubject.HydratedRefSubject<State, Schema.SchemaError>;
    readonly collection?: RefSubject.RefSubject<Collection.State<ItemValue>>;
    readonly id: string;
    readonly parentId?: string;
    readonly level?: number;
    readonly hasChildren?: boolean;
    readonly disabled?: boolean;
    readonly content: Renderable.Any;
}
```

## Property: collection

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

## Property: content

Renderable child content for the component host.

## Property: disabled

Flag used by collection movement and widget handlers to skip activation by default.

## Property: hasChildren

Whether aria-expanded is emitted and hierarchical keys may open descendants.

## Property: id

Stable id used for collection identity and ARIA relationships.

## Property: level

One-based hierarchy level exposed through aria-level.

## Property: parentId

Id whose expansion controls this descendant group.

## Property: state

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