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canirequire › Dual (CommonJS + ESM) › buffer-crc32

Is buffer-crc32 ESM-only? Can you require() it?

A pure javascript CRC32 algorithm that plays nice with binary data

Last verified Sep 9, 2026 against buffer-crc32@1.0.0. Markdown · JSON

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

buffer-crc32 publishes both a CommonJS entry and a native ESM entry (ESM added in 1.0.0). require("buffer-crc32") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.0.0. import "buffer-crc32" works alongside it.

What to do

  1. Nothing to change. require("buffer-crc32") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.0.0. import * as bufferCrc32 from "buffer-crc32" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
1.0.0 (Feb 6, 2024)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
1.0.0
Native ESM since
1.0.0
TypeScript types
Bundled
Node engines
>=8.0.0
Weekly downloads
64.5M
License
MIT

Does buffer-crc32@1.0.0 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("buffer-crc32") from a CommonJS file and import "buffer-crc32" from an ES module.

Runtimerequire("buffer-crc32")import "buffer-crc32"
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 buffer-crc32

ES modules (import)

import * as bufferCrc32 from "buffer-crc32";

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

CommonJS (require)

const bufferCrc32 = require("buffer-crc32");

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 (16 versions; the newest 16 shown).

VersionsFormatFirst published
1.0.0Dual (CommonJS + ESM)Feb 6, 2024
0.1.0 – 0.2.13CommonJSJul 11, 2012

Frequently asked

Is buffer-crc32 ESM-only?

buffer-crc32@1.0.0 ships CommonJS and ESM builds. buffer-crc32 publishes both a CommonJS entry and a native ESM entry (ESM added in 1.0.0). require("buffer-crc32") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.0.0. import "buffer-crc32" works alongside it.

Can I require buffer-crc32?

Yes. buffer-crc32 ships a CommonJS entry alongside the native ESM entry. require("buffer-crc32") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.0.0.

Does buffer-crc32 work in Bun?

Yes. import "buffer-crc32" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does buffer-crc32 ship TypeScript types?

Yes. buffer-crc32 bundles its own type declarations; no @types package is needed.

Links

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