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Is extend-shallow ESM-only? Can you require() it?

Extend an object with the properties of additional objects. node.js/javascript util.

Last verified Sep 9, 2026 against extend-shallow@3.0.2. Markdown · JSON

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

extend-shallow ships CommonJS only. require("extend-shallow") 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 "extend-shallow" 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("extend-shallow") 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 extendShallow from "extend-shallow"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: no types are available for extend-shallow; declare the module yourself if you need them.
Latest
3.0.2 (Dec 20, 2017)
Module format
CommonJS
Last CommonJS version
3.0.2
TypeScript types
None
Node engines
>=0.10.0
Weekly downloads
61.3M
License
MIT

Does extend-shallow@3.0.2 actually load? Runtime test results

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

Runtimerequire("extend-shallow")import "extend-shallow"
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 extend-shallow

ES modules (import)

import extendShallow from "extend-shallow";

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 extendShallow = require("extend-shallow");

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 (13 versions; the newest 13 shown).

VersionsFormatFirst published
0.1.0 – 3.0.2CommonJSOct 6, 2014

Frequently asked

Is extend-shallow ESM-only?

extend-shallow@3.0.2 is a CommonJS package. extend-shallow ships CommonJS only. require("extend-shallow") 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 "extend-shallow" 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 extend-shallow with ES module syntax?

Yes. import extendShallow from "extend-shallow" 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 extend-shallow work in Bun?

Yes. import "extend-shallow" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does extend-shallow ship TypeScript types?

No. extend-shallow ships no type declarations and there is no @types package for it.

Links

Other commonjs packages

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