export declare type Type = 'readAsText' | 'readAsDataURL' | 'readAsArrayBuffer' | 'readAsBinaryString';
declare class FileReaderPromise {
    static _readAs(file: Blob, type: Type): Promise<string>;
    readAsText(file: Blob): Promise<string>;
    readAsDataURL(file: Blob): Promise<string>;
    readAsArrayBuffer(file: Blob): Promise<string>;
    readAsBinaryString(file: Blob): Promise<string>;
}
export default FileReaderPromise;