/**
 * Computes the accessible name for an element using the WAI-ARIA accessible name computation algorithm.
 * Falls back to the placeholder attribute value for input elements when no accessible name is found.
 *
 * @param el - The DOM element to compute the accessible name for
 * @returns The computed accessible name string, or an empty string if none is found
 */
export declare function getAccname(el: Element): string;