canirequire › CommonJS › karma
Is karma ESM-only? Can you require() it?
Spectacular Test Runner for JavaScript.
Last verified Sep 9, 2026 against karma@6.4.4. JSON
CommonJS CommonJS — require() works on every Node.js version
karma ships CommonJS only. require("karma") works everywhere. import "karma" 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.
Does karma@6.4.4 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("karma") from a CommonJS file and import "karma" from an ES module.
| Runtime | require("karma") | import "karma" |
|---|---|---|
| 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
ES modules (import)
import karma from "karma";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 karma = require("karma");Module format by version
Derived from the type, main and exports fields of every stable release on npm (186 versions; the newest 60 shown).
| Versions | Format | First published |
|---|---|---|
| 3.1.3 – 6.4.4 | CommonJS | Dec 1, 2018 |
Frequently asked
Is karma ESM-only?
karma@6.4.4 is a CommonJS package. karma ships CommonJS only. require("karma") works everywhere. import "karma" 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 with ES module syntax?
Yes. import karma from "karma" 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 work in Bun?
Yes. import "karma" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does karma ship TypeScript types?
Not bundled. Install the community types with "npm install -D @types/karma".
Links
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