import { InstrumentationHandlerCallback } from './instrument';
/**
 * Start tracking INP webvital events.
 */
export declare function startTrackingINP(): () => void;
/** Starts tracking the Interaction to Next Paint on the current page. #
 * exported only for testing
 */
export declare function _trackINP(): () => void;
/**
 * exported only for testing
 */
export declare const _onInp: InstrumentationHandlerCallback;
/**
 * Register a listener to cache route information for INP interactions.
 */
export declare function registerInpInteractionListener(): void;
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