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

Sinon and Chai for Karma

Last verified Sep 9, 2026 against karma-sinon-chai@2.0.2. JSON

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

karma-sinon-chai ships CommonJS only. require("karma-sinon-chai") works everywhere. import "karma-sinon-chai" 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
2.0.2 (Jul 6, 2018)
Module format
CommonJS
Last CommonJS version
2.0.2
TypeScript types
@types/karma-sinon-chai
Node engines
not declared
Weekly downloads
60K
License
MIT

Does karma-sinon-chai@2.0.2 actually load? Runtime test results

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

Runtimerequire("karma-sinon-chai")import "karma-sinon-chai"
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-sinon-chai

ES modules (import)

import karmaSinonChai from "karma-sinon-chai";

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 karmaSinonChai = require("karma-sinon-chai");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (27 versions; the newest 27 shown).

VersionsFormatFirst published
0.0.0 – 2.0.2CommonJSAug 2, 2013

Frequently asked

Is karma-sinon-chai ESM-only?

karma-sinon-chai@2.0.2 is a CommonJS package. karma-sinon-chai ships CommonJS only. require("karma-sinon-chai") works everywhere. import "karma-sinon-chai" 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-sinon-chai with ES module syntax?

Yes. import karmaSinonChai from "karma-sinon-chai" 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-sinon-chai work in Bun?

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

Does karma-sinon-chai ship TypeScript types?

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

Links

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