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

utility box for ECMAScript language tools

Last verified Sep 9, 2026 against esutils@2.0.3. Markdown · JSON

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

esutils ships CommonJS only. require("esutils") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0. import "esutils" 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("esutils") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0.
  2. From ES modules use the default import: import esutils from "esutils"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: npm install -D @types/esutils
Latest
2.0.3 (Jul 31, 2019)
Module format
CommonJS
Last CommonJS version
2.0.3
TypeScript types
@types/esutils
Node engines
>=0.10.0
Weekly downloads
139.0M
License
BSD-2-Clause

Does esutils@2.0.3 actually load? Runtime test results

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

Runtimerequire("esutils")import "esutils"
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 esutils

ES modules (import)

import esutils from "esutils";

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 esutils = require("esutils");

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 (12 versions; the newest 12 shown).

VersionsFormatFirst published
1.0.0 – 2.0.3CommonJSNov 25, 2013

Frequently asked

Is esutils ESM-only?

esutils@2.0.3 is a CommonJS package. esutils ships CommonJS only. require("esutils") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0. import "esutils" 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 esutils with ES module syntax?

Yes. import esutils from "esutils" 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 esutils work in Bun?

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

Does esutils ship TypeScript types?

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

Links

Other commonjs packages

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