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

Easy error subclassing and stack customization

Last verified Sep 9, 2026 against error-ex@1.3.4. JSON

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

error-ex ships CommonJS only. require("error-ex") works everywhere. import "error-ex" 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
1.3.4 (Sep 15, 2025)
Module format
CommonJS
Last CommonJS version
1.3.4
TypeScript types
None
Node engines
not declared
Weekly downloads
67.2M
License
MIT

Does error-ex@1.3.4 actually load? Runtime test results

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

Runtimerequire("error-ex")import "error-ex"
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 error-ex

ES modules (import)

import errorEx from "error-ex";

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 errorEx = require("error-ex");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (17 versions; the newest 17 shown).

VersionsFormatFirst published
0.1.0 – 1.3.4CommonJSAug 25, 2015

Frequently asked

Is error-ex ESM-only?

error-ex@1.3.4 is a CommonJS package. error-ex ships CommonJS only. require("error-ex") works everywhere. import "error-ex" 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 error-ex with ES module syntax?

Yes. import errorEx from "error-ex" 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 error-ex work in Bun?

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

Does error-ex ship TypeScript types?

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

Links

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