import { IuploadfileList } from "./ICommon";
export declare class HandleXls {
    /**
     * Convert .xls file to .xlsx format and return as zip structure
     */
    static convertXlsToXlsx(file: File): Promise<IuploadfileList>;
    /**
     * Check if a file is .xls format
     */
    static isXlsFile(file: File): boolean;
}