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Is aggregate-error ESM-only? Can you require() it?

Create an error from multiple errors

Last verified Sep 9, 2026 against aggregate-error@5.0.0. JSON

ESM-only ESM-only since 4.0.0 — last CommonJS version is 3.1.0

aggregate-error dropped its CommonJS build in 4.0.0 (April 2021). The last version you can require() on every Node.js version, including 18 and older, is 3.1.0, published Aug 21, 2020.

On Node.js 20.19+, 22.12+ and every newer release, require("aggregate-error") works anyway: Node can load synchronous ES modules through require(). Verified on Node 20, 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

Latest
5.0.0 (Sep 14, 2023)
Module format
ESM-only
Last CommonJS version
3.1.0
ESM-only since
4.0.0 (Apr 17, 2021)
TypeScript types
Bundled
Node engines
>=18
Weekly downloads
26.8M
License
MIT

Does aggregate-error@5.0.0 actually load? Runtime test results

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

Runtimerequire("aggregate-error")import "aggregate-error"
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✓ works✓ works

How to import aggregate-error

ES modules (import)

import aggregateError from "aggregate-error";

CommonJS (require)

// Node.js 20.19+ / 22.12+ / newer (package has no top-level await):
const aggregateError = require("aggregate-error");

// Any Node.js version:
const aggregateError = await import("aggregate-error");

// Or pin the last CommonJS release:
// npm install aggregate-error@3.1.0

Module format by version

Derived from the type, main and exports fields of every stable release on npm (11 versions; the newest 11 shown).

VersionsFormatFirst published
4.0.0 – 5.0.0ESM-onlyApr 17, 2021
0.1.0 – 3.1.0CommonJSSep 13, 2016

Frequently asked

Is aggregate-error ESM-only?

aggregate-error@5.0.0 is ESM-only. aggregate-error dropped its CommonJS build in 4.0.0 (April 2021). The last version you can require() on every Node.js version, including 18 and older, is 3.1.0, published Aug 21, 2020.

Which version of aggregate-error still supports CommonJS / require()?

3.1.0 is the last version of aggregate-error with a CommonJS build. Install it with "npm install aggregate-error@3.1.0". Every version from 4.0.0 on is ESM-only.

How do I use aggregate-error from a CommonJS file?

Use a dynamic import: const mod = await import("aggregate-error"). On Node.js 20.19+, 22.12+ and newer, a plain require("aggregate-error") also works for ESM packages that do not use top-level await. Alternatively pin aggregate-error@3.1.0.

Does aggregate-error work in Bun?

Yes. import "aggregate-error" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does aggregate-error ship TypeScript types?

Yes. aggregate-error bundles its own type declarations; no @types package is needed.

Links

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