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

cookie session middleware

Last verified Sep 9, 2026 against cookie-session@2.1.1. JSON

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

cookie-session ships CommonJS only. require("cookie-session") works everywhere. import "cookie-session" 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
2.1.1 (Jul 17, 2025)
Module format
CommonJS
Last CommonJS version
2.1.1
TypeScript types
@types/cookie-session
Node engines
>= 0.10
Weekly downloads
347K
License
MIT

Does cookie-session@2.1.1 actually load? Runtime test results

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

Runtimerequire("cookie-session")import "cookie-session"
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-session

ES modules (import)

import cookieSession from "cookie-session";

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 cookieSession = require("cookie-session");

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
1.0.0 – 2.1.1CommonJSFeb 23, 2014

Frequently asked

Is cookie-session ESM-only?

cookie-session@2.1.1 is a CommonJS package. cookie-session ships CommonJS only. require("cookie-session") works everywhere. import "cookie-session" 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-session with ES module syntax?

Yes. import cookieSession from "cookie-session" 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-session work in Bun?

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

Does cookie-session ship TypeScript types?

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

Links

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