promises.FileHandle.appendFile - fs

method promises.FileHandle.appendFile

FileHandle.appendFile(data: string | Uint8Array,
options?: (ObjectEncodingOptions
 & FlagAndOpenMode
 & { flush?: boolean | undefined;  }
)
 | BufferEncoding
 | null,
): Promise<void>

Alias of filehandle.writeFile().

When operating on file handles, the mode cannot be changed from what it was set to with fsPromises.open(). Therefore, this is equivalent to filehandle.writeFile().

Parameters

data: string | Uint8Array

optional

options: (ObjectEncodingOptions
 & FlagAndOpenMode
 & { flush?: boolean | undefined;  }
)
 | BufferEncoding
 | null

Return Type

Promise<void>

Fulfills with undefined upon success.