/**
 * USWDS Date Picker Behavior
 *
 * Mirrors official USWDS date picker JavaScript behavior exactly
 *
 * @uswds-source https://github.com/uswds/uswds/blob/develop/packages/usa-date-picker/src/index.js
 * @uswds-version 3.8.0
 * @last-synced 2025-10-05
 * @sync-status ✅ UP TO DATE
 *
 * CRITICAL: This file replicates USWDS source code to maintain 100% behavior parity.
 * DO NOT add custom logic. ALL changes must come from USWDS source updates.
 */
declare const DATE_PICKER_CLASS = "usa-date-picker";
declare const CALENDAR_DATE_CLASS = "usa-date-picker__calendar__date";
declare const VALIDATION_MESSAGE = "Please enter a valid date";
declare const DEFAULT_EXTERNAL_DATE_FORMAT = "MM/DD/YYYY";
declare const INTERNAL_DATE_FORMAT = "YYYY-MM-DD";
/**
 * Date Picker Event Delegation and Initialization
 *
 * SOURCE: index.js (Lines 2117-2281)
 */
/**
 * Initialize date picker with event delegation
 *
 * SOURCE: index.js (Lines 2266-2281)
 */
export declare function initializeDatePicker(root?: HTMLElement | Document): () => void;
export { DATE_PICKER_CLASS, CALENDAR_DATE_CLASS, VALIDATION_MESSAGE, DEFAULT_EXTERNAL_DATE_FORMAT, INTERNAL_DATE_FORMAT, };
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