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Is arrify ESM-only? Can you require() it?

Convert a value to an array

Last verified Sep 9, 2026 against arrify@3.0.0. Markdown · JSON

ESM-only ESM-only since 3.0.0 — last CommonJS version is 2.0.1

arrify dropped its CommonJS build in 3.0.0 (April 2021). The last version with a plain require()-able CommonJS entry is 2.0.1, published Apr 9, 2019; it declares support for Node.js >=8.

On Node.js 20.19+, 22.12+ and newer, require("arrify") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. On Node.js 18, which has no require(esm), require("arrify") fails with ERR_REQUIRE_ESM.

What to do

  1. On Node.js 20.19+, 22.12+ and newer, require("arrify") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26.
  2. From a CommonJS file, use a dynamic import inside an async function: const arrify = await import("arrify"). That works on every Node.js version the package supports (>=12).
  3. If you need a synchronous require() or run Node.js 18: npm install arrify@2.0.1, the last CommonJS release (published Apr 9, 2019); it declares Node.js >=8.
  4. TypeScript: npm install -D @types/arrify
Latest
3.0.0 (Apr 28, 2021)
Module format
ESM-only
Last CommonJS version
2.0.1
ESM-only since
3.0.0 (Apr 28, 2021)
TypeScript types
@types/arrify
Node engines
>=12
Weekly downloads
25.9M
License
MIT

Does arrify@3.0.0 actually load? Runtime test results

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

Runtimerequire("arrify")import "arrify"
Node.js 18✗ failsERR_REQUIRE_ESM✓ 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 arrify

ES modules (import)

import * as arrify from "arrify";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

// Node.js 20.19+, 22.12+ and newer (verified):
const arrify = require("arrify");

// Any Node.js version the package supports (>=12), from an async function:
async function main() {
  const arrify = await import("arrify");
}

// Or pin the last CommonJS release (declares Node.js >=8):
// npm install arrify@2.0.1

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (5 versions; the newest 5 shown).

VersionsFormatFirst published
3.0.0ESM-onlyApr 28, 2021
1.0.0 – 2.0.1CommonJSFeb 16, 2015

Frequently asked

Is arrify ESM-only?

arrify@3.0.0 is ESM-only. arrify dropped its CommonJS build in 3.0.0 (April 2021). The last version with a plain require()-able CommonJS entry is 2.0.1, published Apr 9, 2019; it declares support for Node.js >=8.

Which version of arrify still supports CommonJS / require()?

2.0.1 is the last version of arrify with a CommonJS build; it declares Node.js >=8. Install it with "npm install arrify@2.0.1". Every version from 3.0.0 on is ESM-only.

How do I use arrify from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const arrify = await import("arrify"). That works on every Node.js version the package supports (>=12). On Node.js 20.19+, 22.12+ and newer, require("arrify") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin arrify@2.0.1 (declares Node.js >=8).

Does arrify work in Bun?

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

Does arrify ship TypeScript types?

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

Links

Other esm-only packages

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