# Is negotiator ESM-only? Can you require() it?

> negotiator@1.1.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

HTTP content negotiation

Last verified Sep 9, 2026 against negotiator@1.1.0.

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

## Facts

- Latest: 1.1.0 (Aug 20, 2026)
- Module format: CommonJS
- Last CommonJS version: 1.1.0
- TypeScript types: @types/negotiator
- Node engines: >=18
- Weekly downloads: 183.3M
- License: MIT

## Runtime test results for negotiator@1.1.0

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

| Runtime | require("negotiator") | import "negotiator" |
|---|---|---|
| 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 negotiator

ES modules:

```js
import negotiator from "negotiator";
```

CommonJS:

```js
const negotiator = require("negotiator");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (29 versions; the newest 29 shown).

| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 1.1.0 | CommonJS | Jan 26, 2012 |

## Frequently asked

**Is negotiator ESM-only?**

negotiator@1.1.0 is a CommonJS package. negotiator ships CommonJS only. require("negotiator") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18. import "negotiator" 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 negotiator with ES module syntax?**

Yes. import negotiator from "negotiator" 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 negotiator work in Bun?**

Yes. import "negotiator" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does negotiator ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/negotiator".

## Links

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

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