import type { ViewportFrameRect } from "../lib/viewportSnapshot";
/** Relay frameIndex → on-screen rect; window.frames order is iframe document order. */
export declare function measureViewportFrameRect(frameIndex: number): ViewportFrameRect | null;
/**
 * Answers trusted parent requests with either an rrweb DOM capture or compact
 * viewport measurements, cascading into this frame's own iframes.
 */
export declare function useViewportSnapshotResponder(): void;