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

> combined-stream@1.0.8 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

A stream that emits multiple other streams one after another.

Last verified Sep 9, 2026 against combined-stream@1.0.8.

combined-stream ships CommonJS only. require("combined-stream") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 0.8. import "combined-stream" 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("combined-stream") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 0.8.
2. From ES modules use the default import: import combinedStream from "combined-stream"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/combined-stream

## Facts

- Latest: 1.0.8 (May 12, 2019)
- Module format: CommonJS
- Last CommonJS version: 1.0.8
- TypeScript types: @types/combined-stream
- Node engines: >= 0.8
- Weekly downloads: 106.3M
- License: MIT

## Runtime test results for combined-stream@1.0.8

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

| Runtime | require("combined-stream") | import "combined-stream" |
|---|---|---|
| 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 combined-stream

ES modules:

```js
import combinedStream from "combined-stream";
```

CommonJS:

```js
const combinedStream = require("combined-stream");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (16 versions; the newest 16 shown).

| Versions | Format | First published |
|---|---|---|
| 0.0.0 – 1.0.8 | CommonJS | May 24, 2011 |

## Frequently asked

**Is combined-stream ESM-only?**

combined-stream@1.0.8 is a CommonJS package. combined-stream ships CommonJS only. require("combined-stream") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 0.8. import "combined-stream" 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 combined-stream with ES module syntax?**

Yes. import combinedStream from "combined-stream" 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 combined-stream work in Bun?**

Yes. import "combined-stream" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does combined-stream ship TypeScript types?**

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

## Links

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

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