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

> ci-info@4.4.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

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Last verified Sep 9, 2026 against ci-info@4.4.0.

ci-info ships CommonJS only. require("ci-info") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8. import "ci-info" 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("ci-info") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.
2. From ES modules use the default import: import ciInfo from "ci-info"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 4.4.0 (Jan 29, 2026)
- Module format: CommonJS
- Last CommonJS version: 4.4.0
- TypeScript types: bundled
- Node engines: >=8
- Weekly downloads: 123.6M
- License: MIT

## Runtime test results for ci-info@4.4.0

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

| Runtime | require("ci-info") | import "ci-info" |
|---|---|---|
| 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 ci-info

ES modules:

```js
import ciInfo from "ci-info";
```

CommonJS:

```js
const ciInfo = require("ci-info");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (36 versions; the newest 36 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 4.4.0 | CommonJS | Oct 20, 2016 |

## Frequently asked

**Is ci-info ESM-only?**

ci-info@4.4.0 is a CommonJS package. ci-info ships CommonJS only. require("ci-info") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8. import "ci-info" 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 ci-info with ES module syntax?**

Yes. import ciInfo from "ci-info" 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 ci-info work in Bun?**

Yes. import "ci-info" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does ci-info ship TypeScript types?**

Yes. ci-info bundles its own type declarations; no @types package is needed.

## Links

- [ci-info on npm](https://www.npmjs.com/package/ci-info)
- [Source repository](https://github.com/watson/ci-info)
- [HTML version](https://canirequire.com/package/ci-info/)
- [JSON version](https://canirequire.com/package/ci-info.json)

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