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

> run-parallel@1.2.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Run an array of functions in parallel

Last verified Sep 9, 2026 against run-parallel@1.2.0.

run-parallel ships CommonJS only. require("run-parallel") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "run-parallel" 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("run-parallel") 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 runParallel from "run-parallel"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/run-parallel

## Facts

- Latest: 1.2.0 (Feb 10, 2021)
- Module format: CommonJS
- Last CommonJS version: 1.2.0
- TypeScript types: @types/run-parallel
- Node engines: not declared
- Weekly downloads: 110.1M
- License: MIT

## Runtime test results for run-parallel@1.2.0

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

| Runtime | require("run-parallel") | import "run-parallel" |
|---|---|---|
| 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 run-parallel

ES modules:

```js
import runParallel from "run-parallel";
```

CommonJS:

```js
const runParallel = require("run-parallel");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (17 versions; the newest 17 shown).

| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 1.2.0 | CommonJS | Apr 12, 2014 |

## Frequently asked

**Is run-parallel ESM-only?**

run-parallel@1.2.0 is a CommonJS package. run-parallel ships CommonJS only. require("run-parallel") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "run-parallel" 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 run-parallel with ES module syntax?**

Yes. import runParallel from "run-parallel" 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 run-parallel work in Bun?**

Yes. import "run-parallel" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does run-parallel ship TypeScript types?**

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

## Links

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

---

For scripts and AI agents: any package is at https://canirequire.com/package/<name>/index.md (Markdown) or https://canirequire.com/package/<name>.json (JSON); the site index is https://canirequire.com/llms.txt. Fetch the URL directly; no search needed.