FileHandle.appendFile - node__fs--promises.d.ts - Node

method FileHandle.appendFile

Usage in Deno

```typescript import { type FileHandle } from "node:node__fs--promises.d.ts"; ```



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.