# State

Current tooltip identity and visibility.

## Signatures

```ts
export interface State {
    readonly id: string;
    readonly open: boolean;
}
```

## Why

A stable id connects the anchor's description relationship to native popover
content while open state stays renderer-independent.

## Ownership and lifetime

Plain state retains no resources; RefSubject observation is Scope-owned.

## Property: id

Stable id used by `aria-describedby` and tooltip content.

## Property: id: Why

Server and client must agree on the relationship target during hydration.

## Property: id: Ownership and lifetime

Plain data acquires no resources.

## Property: open

Whether tooltip content is open.

## Property: open: Why

The value coordinates delayed anchor interactions and native popover state.

## Property: open: Ownership and lifetime

Plain data acquires no resources.