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

> ee-first@1.1.1 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

return the first event in a set of ee/event pairs

Last verified Sep 9, 2026 against ee-first@1.1.1.

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

## Facts

- Latest: 1.1.1 (May 25, 2015)
- Module format: CommonJS
- Last CommonJS version: 1.1.1
- TypeScript types: @types/ee-first
- Node engines: not declared
- Weekly downloads: 79.7M
- License: MIT

## Runtime test results for ee-first@1.1.1

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

| Runtime | require("ee-first") | import "ee-first" |
|---|---|---|
| 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 ee-first

ES modules:

```js
import eeFirst from "ee-first";
```

CommonJS:

```js
const eeFirst = require("ee-first");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (8 versions; the newest 8 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 1.1.1 | CommonJS | Jun 11, 2014 |

## Frequently asked

**Is ee-first ESM-only?**

ee-first@1.1.1 is a CommonJS package. ee-first ships CommonJS only. require("ee-first") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "ee-first" 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 ee-first with ES module syntax?**

Yes. import eeFirst from "ee-first" 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 ee-first work in Bun?**

Yes. import "ee-first" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does ee-first ship TypeScript types?**

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

## Links

- [ee-first on npm](https://www.npmjs.com/package/ee-first)
- [Source repository](https://github.com/jonathanong/ee-first)
- [HTML version](https://canirequire.com/package/ee-first/)
- [JSON version](https://canirequire.com/package/ee-first.json)

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