type PartialDocument = Pick<Document, 'visibilityState' | 'addEventListener' | 'removeEventListener'>;
export declare function getDocumentVisibilityWatcher(doc: PartialDocument | undefined, hiddenIntervalMS: number, signal: AbortSignal): DocumentVisibilityWatcher;
export interface DocumentVisibilityWatcher {
    readonly visibilityState: DocumentVisibilityState;
    waitForVisible(): Promise<unknown>;
    waitForHidden(): Promise<unknown>;
}
export {};
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