/**-----------------------------------------------------------------------------------------
* Copyright © 2026 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
/**
 * @hidden
 *
 * Normalizes keyboard events to ensure consistent key handling across different keyboard layouts.
 *
 * This function addresses the following scenarios:
 * 1. On some keyboards, PageUp/Down, Home/End, and arrow keys are mapped to Numpad keys
 * 2. For letter keys (KeyA-KeyZ), checks the deprecated keyCode property to handle non-QWERTY layouts
 *    (e.g., AZERTY, QWERTZ) where event.code may not match the expected letter
 *
 * @param event - The keyboard event to normalize
 * @returns The normalized key code string (e.g., 'KeyA', 'ArrowDown', 'Enter')
 *
 * @example
 * // On an AZERTY layout, pressing Ctrl+A (where 'A' is physically at 'Q' position)
 * // event.code = 'KeyQ', event.keyCode = 65
 * const code = normalizeKeys(event); // Returns 'KeyA'
 */
export declare const normalizeKeys: (event: KeyboardEvent) => string;