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

Parse, validate, manipulate, and display dates

Last verified Sep 9, 2026 against moment@2.30.1. Markdown · JSON

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

moment ships CommonJS only. require("moment") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js *. import "moment" 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.

What to do

  1. require("moment") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js *.
  2. From ES modules use the default import: import moment from "moment"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: types are bundled; install nothing extra.
Latest
2.30.1 (Dec 27, 2023)
Module format
CommonJS
Last CommonJS version
2.30.1
TypeScript types
Bundled
Node engines
*
Weekly downloads
31.5M
License
MIT

Does moment@2.30.1 actually load? Runtime test results

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

Runtimerequire("moment")import "moment"
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 1.4.0✓ works✓ works

How to import moment

ES modules (import)

import moment from "moment";

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 moment = require("moment");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (76 versions; the newest 60 shown).

VersionsFormatFirst published
2.1.0 – 2.30.1CommonJSJul 7, 2013

Frequently asked

Is moment ESM-only?

moment@2.30.1 is a CommonJS package. moment ships CommonJS only. require("moment") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js *. import "moment" 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 moment with ES module syntax?

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

Yes. import "moment" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does moment ship TypeScript types?

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

Links

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