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canirequire › Dual (CommonJS + ESM) › long

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

A Long class for representing a 64-bit two's-complement integer value.

Last verified Sep 9, 2026 against long@5.3.2. Markdown · JSON

Dual (CommonJS + ESM) Dual package — require() works on every Node.js version we test; import works too

long publishes both a CommonJS entry and a native ESM entry (ESM added in 5.0.0). require("long") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "long" works alongside it.

What to do

  1. Nothing to change. require("long") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import * as long from "long" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
5.3.2 (Apr 17, 2025)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
5.3.2
Native ESM since
5.0.0
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
78.6M
License
Apache-2.0

Does long@5.3.2 actually load? Runtime test results

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

Runtimerequire("long")import "long"
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 long

ES modules (import)

import * as long from "long";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

const long = require("long");

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 (39 versions; the newest 39 shown).

VersionsFormatFirst published
5.1.0 – 5.3.2Dual (CommonJS + ESM)Oct 30, 2021
5.0.0 – 5.0.1ESM-onlyOct 28, 2021
1.0.0 – 4.0.0CommonJSMar 12, 2013

Frequently asked

Is long ESM-only?

long@5.3.2 ships CommonJS and ESM builds. long publishes both a CommonJS entry and a native ESM entry (ESM added in 5.0.0). require("long") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "long" works alongside it.

Can I require long?

Yes. long ships a CommonJS entry alongside the native ESM entry. require("long") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.

Does long work in Bun?

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

Does long ship TypeScript types?

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

Links

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