import type { MaybeRefOrGetter } from './_shared';
import type { Ref } from '@stacksjs/stx';
/**
 * Reactive favicon.
 *
 * @param newIcon - URL of the favicon or a reactive ref/getter
 */
export declare function useFavicon(newIcon?: MaybeRefOrGetter<string | null | undefined>): Ref<string | null>;