# Is write-file-atomic ESM-only? Can you require() it?

> write-file-atomic@8.0.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Write files in an atomic fashion w/configurable ownership

Last verified Sep 9, 2026 against write-file-atomic@8.0.0.

write-file-atomic ships CommonJS only. require("write-file-atomic") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^22.22.2 || ^24.15.0 || >=26.0.0. import "write-file-atomic" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

## What to do

1. require("write-file-atomic") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^22.22.2 || ^24.15.0 || >=26.0.0.
2. From ES modules use the default import: import writeFileAtomic from "write-file-atomic"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/write-file-atomic

## Facts

- Latest: 8.0.0 (May 8, 2026)
- Module format: CommonJS
- Last CommonJS version: 8.0.0
- TypeScript types: @types/write-file-atomic
- Node engines: ^22.22.2 || ^24.15.0 || >=26.0.0
- Weekly downloads: 91.6M
- License: ISC

## Runtime test results for write-file-atomic@8.0.0

Installed and executed on Sep 9, 2026 with require("write-file-atomic") from a CommonJS file and import "write-file-atomic" from an ES module.

| Runtime | require("write-file-atomic") | import "write-file-atomic" |
|---|---|---|
| Node.js 18 | works | works |
| Node.js 20 | works | works |
| Node.js 22 | works | works |
| Node.js 24 | works | works |
| Node.js 26 | works | works |
| Bun 1.4.0 | works | works |

## How to import write-file-atomic

ES modules:

```js
import writeFileAtomic from "write-file-atomic";
```

CommonJS:

```js
const writeFileAtomic = require("write-file-atomic");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (35 versions; the newest 35 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 8.0.0 | CommonJS | Sep 10, 2014 |

## Frequently asked

**Is write-file-atomic ESM-only?**

write-file-atomic@8.0.0 is a CommonJS package. write-file-atomic ships CommonJS only. require("write-file-atomic") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^22.22.2 || ^24.15.0 || >=26.0.0. import "write-file-atomic" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

**Can I import write-file-atomic with ES module syntax?**

Yes. import writeFileAtomic from "write-file-atomic" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

**Does write-file-atomic work in Bun?**

Yes. import "write-file-atomic" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does write-file-atomic ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/write-file-atomic".

## Links

- [write-file-atomic on npm](https://www.npmjs.com/package/write-file-atomic)
- [Source repository](https://github.com/npm/write-file-atomic)
- [HTML version](https://canirequire.com/package/write-file-atomic/)
- [JSON version](https://canirequire.com/package/write-file-atomic.json)

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