[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Fs](https://evolu.dev/docs/api-reference/common/Fs) › FsWriteFileOptions

Defined in: [packages/common/src/Fs.ts:243](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Fs.ts#L243)

Options for [Fs.writeFile](https://evolu.dev/docs/api-reference/common/Fs/interfaces/Fs#writefile).

## Properties

<a id="encoding"></a>

### encoding?

```ts
readonly optional encoding?: FsEncoding;
```

Defined in: [packages/common/src/Fs.ts:245](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Fs.ts#L245)

Encoding of string data. Defaults to `utf8`.

---

<a id="flag"></a>

### flag?

```ts
readonly optional flag?: FsOpenFlag;
```

Defined in: [packages/common/src/Fs.ts:249](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Fs.ts#L249)

Open flag. Defaults to `w`; use `wx` to fail when the file exists.

---

<a id="mode"></a>

### mode?

```ts
readonly optional mode?: number;
```

Defined in: [packages/common/src/Fs.ts:247](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Fs.ts#L247)

File mode of a created file. Defaults to `0o666`.