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

> merge-descriptors@2.0.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Merge objects using their property descriptors

Last verified Sep 9, 2026 against merge-descriptors@2.0.0.

merge-descriptors ships CommonJS only. require("merge-descriptors") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18. import "merge-descriptors" 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("merge-descriptors") 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 mergeDescriptors from "merge-descriptors"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 2.0.0 (Nov 16, 2023)
- Module format: CommonJS
- Last CommonJS version: 2.0.0
- TypeScript types: bundled
- Node engines: >=18
- Weekly downloads: 113.0M
- License: MIT

## Runtime test results for merge-descriptors@2.0.0

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

| Runtime | require("merge-descriptors") | import "merge-descriptors" |
|---|---|---|
| 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 merge-descriptors

ES modules:

```js
import mergeDescriptors from "merge-descriptors";
```

CommonJS:

```js
const mergeDescriptors = require("merge-descriptors");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (7 versions; the newest 7 shown).

| Versions | Format | First published |
|---|---|---|
| 0.0.1 – 2.0.0 | CommonJS | Oct 29, 2013 |

## Frequently asked

**Is merge-descriptors ESM-only?**

merge-descriptors@2.0.0 is a CommonJS package. merge-descriptors ships CommonJS only. require("merge-descriptors") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18. import "merge-descriptors" 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 merge-descriptors with ES module syntax?**

Yes. import mergeDescriptors from "merge-descriptors" 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 merge-descriptors work in Bun?**

Yes. import "merge-descriptors" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does merge-descriptors ship TypeScript types?**

Yes. merge-descriptors bundles its own type declarations; no @types package is needed.

## Links

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

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