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

Use webpack with karma

Last verified Sep 9, 2026 against karma-webpack@5.0.1. JSON

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

karma-webpack ships CommonJS only. require("karma-webpack") works everywhere. import "karma-webpack" 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
5.0.1 (Feb 1, 2024)
Module format
CommonJS
Last CommonJS version
5.0.1
TypeScript types
@types/karma-webpack
Node engines
>= 18
Weekly downloads
457K
License
MIT

Does karma-webpack@5.0.1 actually load? Runtime test results

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

Runtimerequire("karma-webpack")import "karma-webpack"
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 karma-webpack

ES modules (import)

import karmaWebpack from "karma-webpack";

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 karmaWebpack = require("karma-webpack");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (40 versions; the newest 40 shown).

VersionsFormatFirst published
1.0.0 – 5.0.1CommonJSJan 19, 2014

Frequently asked

Is karma-webpack ESM-only?

karma-webpack@5.0.1 is a CommonJS package. karma-webpack ships CommonJS only. require("karma-webpack") works everywhere. import "karma-webpack" 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 karma-webpack with ES module syntax?

Yes. import karmaWebpack from "karma-webpack" 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 karma-webpack work in Bun?

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

Does karma-webpack ship TypeScript types?

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

Links

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