import type { Ref } from '@stacksjs/stx';
/**
 * Reactive URL representing an object (Blob/File).
 * The URL is automatically revoked when the source changes or on unmount.
 *
 * @param source - A ref containing a Blob, File, MediaSource, or null/undefined
 */
export declare function useObjectUrl(source: Ref<Blob | File | MediaSource | null | undefined>): Ref<string | undefined>;