# Is detect-node-es ESM-only? Can you require() it?

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

Detect Node.JS (as opposite to browser environment). ESM modification

Last verified Sep 9, 2026 against detect-node-es@1.1.0.

detect-node-es ships CommonJS only. require("detect-node-es") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "detect-node-es" 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.

It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.

## What to do

1. require("detect-node-es") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
2. From ES modules use the default import: import detectNodeEs from "detect-node-es"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 1.1.0 (Mar 18, 2021)
- Module format: CommonJS
- Last CommonJS version: 1.1.0
- TypeScript types: bundled
- Node engines: not declared
- Weekly downloads: 48.8M
- License: MIT

## Runtime test results for detect-node-es@1.1.0

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

| Runtime | require("detect-node-es") | import "detect-node-es" |
|---|---|---|
| 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 detect-node-es

ES modules:

```js
import detectNodeEs from "detect-node-es";
```

CommonJS:

```js
const detectNodeEs = require("detect-node-es");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (2 versions; the newest 2 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 1.1.0 | CommonJS | Jul 27, 2020 |

## Frequently asked

**Is detect-node-es ESM-only?**

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

Yes. import detectNodeEs from "detect-node-es" 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 detect-node-es work in Bun?**

Yes. import "detect-node-es" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does detect-node-es ship TypeScript types?**

Yes. detect-node-es bundles its own type declarations; no @types package is needed.

## Links

- [detect-node-es on npm](https://www.npmjs.com/package/detect-node-es)
- [Source repository](https://github.com/thekashey/detect-node)
- [HTML version](https://canirequire.com/package/detect-node-es/)
- [JSON version](https://canirequire.com/package/detect-node-es.json)

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