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Is winston ESM-only? Can you require() it?

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Last verified Sep 9, 2026 against winston@3.19.0. JSON

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

winston ships CommonJS only. require("winston") works everywhere. import "winston" 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
3.19.0 (Dec 7, 2025)
Module format
CommonJS
Last CommonJS version
3.19.0
TypeScript types
Bundled
Node engines
>= 12.0.0
Weekly downloads
18.6M
License
MIT

Does winston@3.19.0 actually load? Runtime test results

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

Runtimerequire("winston")import "winston"
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 winston

ES modules (import)

import winston from "winston";

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 winston = require("winston");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (87 versions; the newest 60 shown).

VersionsFormatFirst published
0.8.3 – 3.19.0CommonJSNov 4, 2014

Frequently asked

Is winston ESM-only?

winston@3.19.0 is a CommonJS package. winston ships CommonJS only. require("winston") works everywhere. import "winston" 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 winston with ES module syntax?

Yes. import winston from "winston" 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 winston work in Bun?

Yes. import "winston" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does winston ship TypeScript types?

Yes. winston bundles its own type declarations; no @types package is needed.

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