# Is karma-chrome-launcher ESM-only? Can you require() it?

> karma-chrome-launcher@3.2.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

A Karma plugin. Launcher for Chrome and Chrome Canary.

Last verified Sep 9, 2026 against karma-chrome-launcher@3.2.0.

karma-chrome-launcher ships CommonJS only. require("karma-chrome-launcher") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "karma-chrome-launcher" 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("karma-chrome-launcher") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
2. From ES modules use the default import: import karmaChromeLauncher from "karma-chrome-launcher"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/karma-chrome-launcher

## Facts

- Latest: 3.2.0 (Apr 20, 2023)
- Module format: CommonJS
- Last CommonJS version: 3.2.0
- TypeScript types: @types/karma-chrome-launcher
- Node engines: not declared
- Weekly downloads: 2.7M
- License: MIT

## Runtime test results for karma-chrome-launcher@3.2.0

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

| Runtime | require("karma-chrome-launcher") | import "karma-chrome-launcher" |
|---|---|---|
| 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 karma-chrome-launcher

ES modules:

```js
import karmaChromeLauncher from "karma-chrome-launcher";
```

CommonJS:

```js
const karmaChromeLauncher = require("karma-chrome-launcher");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (28 versions; the newest 28 shown).

| Versions | Format | First published |
|---|---|---|
| 0.0.1 – 3.2.0 | CommonJS | Mar 19, 2013 |

## Frequently asked

**Is karma-chrome-launcher ESM-only?**

karma-chrome-launcher@3.2.0 is a CommonJS package. karma-chrome-launcher ships CommonJS only. require("karma-chrome-launcher") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "karma-chrome-launcher" 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-chrome-launcher with ES module syntax?**

Yes. import karmaChromeLauncher from "karma-chrome-launcher" 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-chrome-launcher work in Bun?**

Yes. import "karma-chrome-launcher" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does karma-chrome-launcher ship TypeScript types?**

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

## Links

- [karma-chrome-launcher on npm](https://www.npmjs.com/package/karma-chrome-launcher)
- [Source repository](https://github.com/karma-runner/karma-chrome-launcher)
- [HTML version](https://canirequire.com/package/karma-chrome-launcher/)
- [JSON version](https://canirequire.com/package/karma-chrome-launcher.json)

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