import { MaybeRefOrGetter } from '../../node_modules/vue';
/**
 * Reactively tracks DOM elements matching CSS selectors via `MutationObserver`.
 *
 * @param root - Root node whose subtree is observed; defaults to `window.document`.
 * @param once - When `true`, stops observing a selector as soon as it matches at least one element.
 * @returns An object with `querySelector` (first match) and `querySelectorAll` (all matches), both returning reactive computed refs.
 * @example
 * <script setup>
 * import { useQueryObserver } from '@icij/murmur-next'
 *
 * const { querySelector, querySelectorAll } = useQueryObserver()
 * const heading = querySelector('h1')
 * const links = querySelectorAll('a')
 * </script>
 */
export declare function useQueryObserver(root?: MaybeRefOrGetter<Document | HTMLElement | null | undefined>, once?: boolean): {
    querySelector: (selector: string, options?: {
        immediate: boolean;
    }) => import('../../node_modules/vue').ComputedRef<HTMLElement | undefined>;
    querySelectorAll: (selector: string, options?: {
        immediate: boolean;
    }) => import('../../node_modules/vue').ComputedRef<never[] | HTMLElement[]>;
};