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

> is-arrayish@0.3.4 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Determines if an object can be used as an array

Last verified Sep 9, 2026 against is-arrayish@0.3.4.

is-arrayish ships CommonJS only. require("is-arrayish") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "is-arrayish" 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("is-arrayish") 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 isArrayish from "is-arrayish"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: no types are available for is-arrayish; declare the module yourself if you need them.

## Facts

- Latest: 0.3.4 (Sep 13, 2025)
- Module format: CommonJS
- Last CommonJS version: 0.3.4
- TypeScript types: none
- Node engines: not declared
- Weekly downloads: 111.5M
- License: MIT

## Runtime test results for is-arrayish@0.3.4

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

| Runtime | require("is-arrayish") | import "is-arrayish" |
|---|---|---|
| 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 is-arrayish

ES modules:

```js
import isArrayish from "is-arrayish";
```

CommonJS:

```js
const isArrayish = require("is-arrayish");
```

## 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 |
|---|---|---|
| 0.1.0 – 0.3.4 | CommonJS | Aug 25, 2015 |

## Frequently asked

**Is is-arrayish ESM-only?**

is-arrayish@0.3.4 is a CommonJS package. is-arrayish ships CommonJS only. require("is-arrayish") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "is-arrayish" 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 is-arrayish with ES module syntax?**

Yes. import isArrayish from "is-arrayish" 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 is-arrayish work in Bun?**

Yes. import "is-arrayish" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does is-arrayish ship TypeScript types?**

No. is-arrayish ships no type declarations and there is no @types package for it.

## Links

- [is-arrayish on npm](https://www.npmjs.com/package/is-arrayish)
- [Source repository](https://github.com/qix-/node-is-arrayish)
- [HTML version](https://canirequire.com/package/is-arrayish/)
- [JSON version](https://canirequire.com/package/is-arrayish.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.