interface TextDecoderStreamPropertiesreadonlyencoding: stringReturns encoding's name, lowercased. readonlyfatal: booleanReturns true if error mode is "fatal", and false otherwise. readonlyignoreBOM: booleanReturns true if ignore BOM flag is set, and false otherwise. readonlyreadable: ReadableStream<string>readonlywritable: WritableStream<BufferSource>readonly[[Symbol.toStringTag]]: stringvariable TextDecoderStreamtype{ readonly prototype: TextDecoderStream; new (label?: string, options?: TextDecoderOptions): TextDecoderStream; }