/**
 * Announce text in the appropriate persistent live region.
 *
 * Polite – appends a new <li> so queued messages are not discarded.
 *   Each addition is announced separately (aria-atomic=false, aria-relevant=additions).
 *   The element is removed after ANNOUNCEMENT_LIFETIME_MS to keep the DOM lean.
 *
 * Assertive – replaces the current text so the screen reader interrupts
 *   immediately. The previous clear timer is cancelled to prevent early
 *   erasure when two assertive toasts fire in quick succession.
 *
 * @param text  The announcement text.
 * @param level 'polite' or 'assertive'.
 */
declare function announce(text: string, level: 'polite' | 'assertive'): void;
/**
 * Return the host element of the visual toast stack.
 * toast.ts mounts individual ToastNotification apps inside this element.
 */
declare function getContainerEl(): HTMLElement | null;
declare const _default: import('vue').DefineComponent<{}, {
    announce: typeof announce;
    getContainerEl: typeof getContainerEl;
}, {}, {}, {}, import('vue').ComponentOptionsMixin, import('vue').ComponentOptionsMixin, {}, string, import('vue').PublicProps, Readonly<{}> & Readonly<{}>, {}, {}, {}, {}, string, import('vue').ComponentProvideOptions, true, {
    politeRef: HTMLUListElement;
    assertiveRef: HTMLDivElement;
    containerRef: HTMLDivElement;
}, any>;
export default _default;