/**
 * Upload a file to a signed URL using XMLHttpRequest, with optional progress
 * tracking.
 *
 * @param url - The signed upload URL.
 * @param file - The file to upload.
 * @param onProgress - Optional callback invoked with `{ loaded, total }` in
 *   bytes as the upload progresses.
 */
export declare function uploadWithProgress(url: string, file: File, onProgress?: (progress: {
    loaded: number;
    total: number;
}) => void): Promise<void>;
//# sourceMappingURL=upload.d.ts.map