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

> concurrently@10.0.5 is ESM-only. ESM-only since 10.0.0 — last CommonJS version is 9.2.4.

Run commands concurrently

Last verified Sep 9, 2026 against concurrently@10.0.5.

concurrently dropped its CommonJS build in 10.0.0 (May 2026). The last version with a plain require()-able CommonJS entry is 9.2.4, published Jul 11, 2026; it declares support for Node.js >=18.

On Node.js 22.12+ and newer (concurrently@10.0.5 declares Node.js >=22), require("concurrently") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 22, 24 and 26. Node.js 18 has no require(esm), and concurrently@10.0.5 declares Node.js >=22, so 18 is outside its supported range anyway.

concurrently@10.0.5 declares engines ">=22", so Node.js 18, 20 are outside its supported range regardless of module format.

## What to do

1. On Node.js 22.12+ and newer (concurrently@10.0.5 declares Node.js >=22), require("concurrently") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 22, 24 and 26.
2. From a CommonJS file, use a dynamic import inside an async function: const concurrently = await import("concurrently"). That works on every Node.js version the package supports (>=22).
3. If you need a synchronous require() or run Node.js 18: npm install concurrently@9.2.4, the last CommonJS release (published Jul 11, 2026); it declares Node.js >=18.
4. concurrently@10.0.5 declares engines ">=22", so Node.js 18, 20 are unsupported regardless: upgrade Node.js or pin an older release.
5. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 10.0.5 (Aug 15, 2026)
- Module format: ESM-only
- Last CommonJS version: 9.2.4
- ESM-only since: 10.0.0 (May 28, 2026)
- TypeScript types: bundled
- Node engines: >=22
- Weekly downloads: 18.7M
- License: MIT

## Runtime test results for concurrently@10.0.5

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

| Runtime | require("concurrently") | import "concurrently" |
|---|---|---|
| Node.js 18 | fails (ERR_REQUIRE_ESM) | 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 concurrently

ES modules:

```js
import * as concurrently from "concurrently";
```

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS:

```js
// Node.js 22.12+ and newer (verified):
const concurrently = require("concurrently");

// Any Node.js version the package supports (>=22), from an async function:
async function main() {
  const concurrently = await import("concurrently");
}

// Or pin the last CommonJS release (declares Node.js >=18):
// npm install concurrently@9.2.4
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (70 versions; the newest 60 shown).

| Versions | Format | First published |
|---|---|---|
| 10.0.0 – 10.0.5 | ESM-only | May 28, 2026 |
| 7.0.0 – 9.2.4 | Dual (CommonJS + ESM) | Jan 3, 2022 |
| 3.0.0 – 6.5.1 | CommonJS | Sep 26, 2016 |

## Frequently asked

**Is concurrently ESM-only?**

concurrently@10.0.5 is ESM-only. concurrently dropped its CommonJS build in 10.0.0 (May 2026). The last version with a plain require()-able CommonJS entry is 9.2.4, published Jul 11, 2026; it declares support for Node.js >=18.

**Which version of concurrently still supports CommonJS / require()?**

9.2.4 is the last version of concurrently with a CommonJS build; it declares Node.js >=18. Install it with "npm install concurrently@9.2.4". Every version from 10.0.0 on is ESM-only.

**How do I use concurrently from a CommonJS file?**

From a CommonJS file, use a dynamic import inside an async function: const concurrently = await import("concurrently"). That works on every Node.js version the package supports (>=22). On Node.js 22.12+ and newer (concurrently@10.0.5 declares Node.js >=22), require("concurrently") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 22, 24 and 26. Alternatively pin concurrently@9.2.4 (declares Node.js >=18).

**Does concurrently work in Bun?**

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

**Does concurrently ship TypeScript types?**

Yes. concurrently bundles its own type declarations; no @types package is needed.

## Links

- [concurrently on npm](https://www.npmjs.com/package/concurrently)
- [Source repository](https://github.com/open-cli-tools/concurrently)
- [HTML version](https://canirequire.com/package/concurrently/)
- [JSON version](https://canirequire.com/package/concurrently.json)

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