/**
 * a标签模拟点击下载
 *
 * @param fileUrl
 * @param fileName
 */
export declare const downloadFile: (fileUrl: string, fileName?: string | null) => void;
/**
 * Blob方式模拟点击下载
 *
 * @param fileUrl
 * @param fileName
 */
export declare const downloadByBlob: (fileUrl: string, fileName?: string | null) => void;