import { Observable } from '@legendapp/state';

/**
 * Framework-agnostic reactive document visibility state.
 *
 * Tracks the browser tab's visibility state (`'visible'` or `'hidden'`).
 * Returns a writable `Observable<DocumentVisibilityState>` that updates
 * automatically when the user switches tabs or minimizes the window.
 *
 * SSR-safe: returns `'visible'` when `document` is not available.
 *
 * @returns `Observable<DocumentVisibilityState>` — reflects current tab visibility.
 */
declare function createDocumentVisibility(): Observable<DocumentVisibilityState>;

export { createDocumentVisibility };