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

> bluebird@3.7.2 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Full featured Promises/A+ implementation with exceptionally good performance

Last verified Sep 9, 2026 against bluebird@3.7.2.

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

## Facts

- Latest: 3.7.2 (Nov 28, 2019)
- Module format: CommonJS
- Last CommonJS version: 3.7.2
- TypeScript types: @types/bluebird
- Node engines: not declared
- Weekly downloads: 39.7M
- License: MIT

## Runtime test results for bluebird@3.7.2

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

| Runtime | require("bluebird") | import "bluebird" |
|---|---|---|
| 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 bluebird

ES modules:

```js
import bluebird from "bluebird";
```

CommonJS:

```js
const bluebird = require("bluebird");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (135 versions; the newest 60 shown).

| Versions | Format | First published |
|---|---|---|
| 2.9.19 – 3.7.2 | CommonJS | Mar 29, 2015 |

## Frequently asked

**Is bluebird ESM-only?**

bluebird@3.7.2 is a CommonJS package. bluebird ships CommonJS only. require("bluebird") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "bluebird" 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 bluebird with ES module syntax?**

Yes. import bluebird from "bluebird" 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 bluebird work in Bun?**

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

**Does bluebird ship TypeScript types?**

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

## Links

- [bluebird on npm](https://www.npmjs.com/package/bluebird)
- [Source repository](https://github.com/petkaantonov/bluebird)
- [HTML version](https://canirequire.com/package/bluebird/)
- [JSON version](https://canirequire.com/package/bluebird.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.