import { MaybeRef, Ref } from 'vue';
/**
 * Manages an ARIA live region message with a clear-then-set pattern.
 *
 * Screen readers only announce `aria-live` content on a transition from empty
 * to non-empty text. By clearing the message first and then setting it in the
 * next tick we guarantee that every file selection produces that empty→non-empty
 * transition, even when the same file is selected again.
 */
export declare const useAriaLiveMessage: (selectedFiles: Ref<readonly File[]>, formatter: MaybeRef<((files: readonly File[]) => string) | undefined>) => Readonly<Ref<string, string>>;