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

A tiny (304B to 489B) utility for check for deep equality

Last verified Sep 9, 2026 against dequal@2.0.3. Markdown · JSON

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

dequal publishes both a CommonJS entry and a native ESM entry (ESM added in 2.0.0). require("dequal") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6. import "dequal" works alongside it.

What to do

  1. Nothing to change. require("dequal") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6. import * as dequal from "dequal" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
2.0.3 (Jul 11, 2022)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
2.0.3
Native ESM since
2.0.0
TypeScript types
Bundled
Node engines
>=6
Weekly downloads
65.0M
License
MIT

Does dequal@2.0.3 actually load? Runtime test results

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

Runtimerequire("dequal")import "dequal"
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 dequal

ES modules (import)

import * as dequal from "dequal";

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

CommonJS (require)

const dequal = require("dequal");

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 (7 versions; the newest 7 shown).

VersionsFormatFirst published
2.0.0 – 2.0.3Dual (CommonJS + ESM)Aug 12, 2020
0.0.0 – 1.0.1CommonJSMar 7, 2019

Frequently asked

Is dequal ESM-only?

dequal@2.0.3 ships CommonJS and ESM builds. dequal publishes both a CommonJS entry and a native ESM entry (ESM added in 2.0.0). require("dequal") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6. import "dequal" works alongside it.

Can I require dequal?

Yes. dequal ships a CommonJS entry alongside the native ESM entry. require("dequal") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6.

Does dequal work in Bun?

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

Does dequal ship TypeScript types?

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

Links

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