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

Promisify a callback-based function

Last verified Sep 9, 2026 against thenify@3.3.1. JSON

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

thenify ships CommonJS only. require("thenify") works everywhere. import "thenify" 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
3.3.1 (Jun 17, 2020)
Module format
CommonJS
Last CommonJS version
3.3.1
TypeScript types
None
Node engines
not declared
Weekly downloads
48.1M
License
MIT

Does thenify@3.3.1 actually load? Runtime test results

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

Runtimerequire("thenify")import "thenify"
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 thenify

ES modules (import)

import thenify from "thenify";

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 thenify = require("thenify");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (9 versions; the newest 9 shown).

VersionsFormatFirst published
1.0.0 – 3.3.1CommonJSAug 9, 2014

Frequently asked

Is thenify ESM-only?

thenify@3.3.1 is a CommonJS package. thenify ships CommonJS only. require("thenify") works everywhere. import "thenify" 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 thenify with ES module syntax?

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

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

Does thenify ship TypeScript types?

No. thenify ships no type declarations and there is no @types package for it.

Links

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