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Is webpack-merge ESM-only? Can you require() it?

Variant of merge that's useful for webpack configuration

Last verified Sep 9, 2026 against webpack-merge@6.0.1. JSON

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

webpack-merge ships CommonJS only. require("webpack-merge") works everywhere. import "webpack-merge" 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
6.0.1 (Jul 2, 2024)
Module format
CommonJS
Last CommonJS version
6.0.1
TypeScript types
Bundled
Node engines
>=18.0.0
Weekly downloads
14.6M
License
MIT

Does webpack-merge@6.0.1 actually load? Runtime test results

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

Runtimerequire("webpack-merge")import "webpack-merge"
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 webpack-merge

ES modules (import)

import webpackMerge from "webpack-merge";

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 webpackMerge = require("webpack-merge");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (89 versions; the newest 60 shown).

VersionsFormatFirst published
0.16.0 – 6.0.1CommonJSNov 14, 2016

Frequently asked

Is webpack-merge ESM-only?

webpack-merge@6.0.1 is a CommonJS package. webpack-merge ships CommonJS only. require("webpack-merge") works everywhere. import "webpack-merge" 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 webpack-merge with ES module syntax?

Yes. import webpackMerge from "webpack-merge" 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 webpack-merge work in Bun?

Yes. import "webpack-merge" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does webpack-merge ship TypeScript types?

Yes. webpack-merge bundles its own type declarations; no @types package is needed.

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