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canirequire › Dual (CommonJS + ESM) › fast-equals

Is fast-equals ESM-only? Can you require() it?

A blazing-fast equality comparison utility for a variety of use-cases

Last verified Sep 9, 2026 against fast-equals@6.0.3. Markdown · JSON

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

fast-equals publishes both a CommonJS entry and a native ESM entry (ESM added in 5.0.0). require("fast-equals") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6.0.0. import "fast-equals" works alongside it.

What to do

  1. Nothing to change. require("fast-equals") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6.0.0. import * as fastEquals from "fast-equals" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
6.0.3 (Sep 3, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
6.0.3
Native ESM since
5.0.0
TypeScript types
Bundled
Node engines
>=6.0.0
Weekly downloads
44.7M
License
MIT

Does fast-equals@6.0.3 actually load? Runtime test results

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

Runtimerequire("fast-equals")import "fast-equals"
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 fast-equals

ES modules (import)

import * as fastEquals from "fast-equals";

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

CommonJS (require)

const fastEquals = require("fast-equals");

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 (56 versions; the newest 56 shown).

VersionsFormatFirst published
5.0.0 – 6.0.3Dual (CommonJS + ESM)Mar 5, 2023
1.0.0 – 4.0.3CommonJSOct 15, 2017

Frequently asked

Is fast-equals ESM-only?

fast-equals@6.0.3 ships CommonJS and ESM builds. fast-equals publishes both a CommonJS entry and a native ESM entry (ESM added in 5.0.0). require("fast-equals") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6.0.0. import "fast-equals" works alongside it.

Can I require fast-equals?

Yes. fast-equals ships a CommonJS entry alongside the native ESM entry. require("fast-equals") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=6.0.0.

Does fast-equals work in Bun?

Yes. import "fast-equals" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does fast-equals ship TypeScript types?

Yes. fast-equals bundles its own type declarations; no @types package is needed.

Links

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