canirequire

canirequire › ESM-only › deep-eql

Is deep-eql ESM-only? Can you require() it?

Improved deep equality testing for Node.js and the browser.

Last verified Sep 9, 2026 against deep-eql@5.0.2. JSON

ESM-only ESM-only since 5.0.0 — last CommonJS version is 4.1.4

deep-eql dropped its CommonJS build in 5.0.0 (October 2023). The last version you can require() on every Node.js version, including 18 and older, is 4.1.4, published Jun 5, 2024.

On Node.js 20.19+, 22.12+ and every newer release, require("deep-eql") works anyway: Node can load synchronous ES modules through require(). Verified on Node 20, 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

Latest
5.0.2 (Jun 3, 2024)
Module format
ESM-only
Last CommonJS version
4.1.4
ESM-only since
5.0.0 (Oct 18, 2023)
TypeScript types
@types/deep-eql
Node engines
>=6
Weekly downloads
51.2M
License
MIT

Does deep-eql@5.0.2 actually load? Runtime test results

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

Runtimerequire("deep-eql")import "deep-eql"
Node.js 18✗ failsERR_REQUIRE_ESM✓ 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 deep-eql

ES modules (import)

import deepEql from "deep-eql";

CommonJS (require)

// Node.js 20.19+ / 22.12+ / newer (package has no top-level await):
const deepEql = require("deep-eql");

// Any Node.js version:
const deepEql = await import("deep-eql");

// Or pin the last CommonJS release:
// npm install deep-eql@4.1.4

Module format by version

Derived from the type, main and exports fields of every stable release on npm (23 versions; the newest 23 shown).

VersionsFormatFirst published
5.0.0 – 5.0.2ESM-onlyOct 18, 2023
0.1.0 – 4.1.4CommonJSSep 18, 2013

Frequently asked

Is deep-eql ESM-only?

deep-eql@5.0.2 is ESM-only. deep-eql dropped its CommonJS build in 5.0.0 (October 2023). The last version you can require() on every Node.js version, including 18 and older, is 4.1.4, published Jun 5, 2024.

Which version of deep-eql still supports CommonJS / require()?

4.1.4 is the last version of deep-eql with a CommonJS build. Install it with "npm install deep-eql@4.1.4". Every version from 5.0.0 on is ESM-only.

How do I use deep-eql from a CommonJS file?

Use a dynamic import: const mod = await import("deep-eql"). On Node.js 20.19+, 22.12+ and newer, a plain require("deep-eql") also works for ESM packages that do not use top-level await. Alternatively pin deep-eql@4.1.4.

Does deep-eql work in Bun?

Yes. import "deep-eql" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does deep-eql ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/deep-eql".

Links

Other esm-only packages

Similar popularity