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Is cookie-signature ESM-only? Can you require() it?

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Last verified Sep 9, 2026 against cookie-signature@1.2.2. JSON

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

cookie-signature ships CommonJS only. require("cookie-signature") works everywhere. import "cookie-signature" 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
1.2.2 (Oct 29, 2024)
Module format
CommonJS
Last CommonJS version
1.2.2
TypeScript types
@types/cookie-signature
Node engines
>=6.6.0
Weekly downloads
122.7M
License
MIT

Does cookie-signature@1.2.2 actually load? Runtime test results

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

Runtimerequire("cookie-signature")import "cookie-signature"
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 cookie-signature

ES modules (import)

import cookieSignature from "cookie-signature";

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 cookieSignature = require("cookie-signature");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (13 versions; the newest 13 shown).

VersionsFormatFirst published
0.0.1 – 1.2.2CommonJSOct 15, 2012

Frequently asked

Is cookie-signature ESM-only?

cookie-signature@1.2.2 is a CommonJS package. cookie-signature ships CommonJS only. require("cookie-signature") works everywhere. import "cookie-signature" 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 cookie-signature with ES module syntax?

Yes. import cookieSignature from "cookie-signature" 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 cookie-signature work in Bun?

Yes. import "cookie-signature" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does cookie-signature ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/cookie-signature".

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