/**
 * performance.interactionCount polyfill
 *
 * The interactionCount is an integer which counts the total number of distinct user interactions,
 * for which there was a unique interactionId.
 *
 * The interactionCount polyfill is an estimate based on a convention specific to Chrome. Cf: https://github.com/GoogleChrome/web-vitals/pull/213
 * This is currently not an issue as the polyfill is only used for INP which is currently only supported on Chrome.
 * Hopefully when/if other browsers will support INP, they will also implement performance.interactionCount at the same time, so we won't need that polyfill.
 *
 * Reference implementation: https://github.com/GoogleChrome/web-vitals/blob/main/src/lib/polyfills/interactionCountPolyfill.ts
 */
export declare function initInteractionCountPolyfill(): void;
/**
 * Returns the `interactionCount` value using the native API (if available)
 * or the polyfill estimate in this module.
 */
export declare const getInteractionCount: () => number;