# Is functions-have-names ESM-only? Can you require() it?

> functions-have-names@1.2.3 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Does this JS environment support the `name` property on functions?

Last verified Sep 9, 2026 against functions-have-names@1.2.3.

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

## Facts

- Latest: 1.2.3 (Apr 19, 2022)
- Module format: CommonJS
- Last CommonJS version: 1.2.3
- TypeScript types: @types/functions-have-names
- Node engines: not declared
- Weekly downloads: 76.2M
- License: MIT

## Runtime test results for functions-have-names@1.2.3

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

| Runtime | require("functions-have-names") | import "functions-have-names" |
|---|---|---|
| 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 functions-have-names

ES modules:

```js
import functionsHaveNames from "functions-have-names";
```

CommonJS:

```js
const functionsHaveNames = require("functions-have-names");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (7 versions; the newest 7 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 1.2.3 | CommonJS | Jul 23, 2019 |

## Frequently asked

**Is functions-have-names ESM-only?**

functions-have-names@1.2.3 is a CommonJS package. functions-have-names ships CommonJS only. require("functions-have-names") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "functions-have-names" 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 functions-have-names with ES module syntax?**

Yes. import functionsHaveNames from "functions-have-names" 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 functions-have-names work in Bun?**

Yes. import "functions-have-names" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does functions-have-names ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/functions-have-names".

## Links

- [functions-have-names on npm](https://www.npmjs.com/package/functions-have-names)
- [Source repository](https://github.com/inspect-js/functions-have-names)
- [HTML version](https://canirequire.com/package/functions-have-names/)
- [JSON version](https://canirequire.com/package/functions-have-names.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.