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

Determines if an object can be used as an array

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

CommonJS CommonJS — require() works on every Node.js version

is-arrayish ships CommonJS only. require("is-arrayish") works everywhere. 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.

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

Does is-arrayish@0.3.4 actually load? Runtime test results

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

Runtimerequire("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✓ works✓ works

How to import is-arrayish

ES modules (import)

import isArrayish from "is-arrayish";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

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).

VersionsFormatFirst published
0.1.0 – 0.3.4CommonJSAug 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 everywhere. 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 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

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