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canirequire › Dual (CommonJS + ESM) › @smithy/core

Is @smithy/core ESM-only? Can you require() it?

Last verified Sep 9, 2026 against @smithy/core@3.33.3. JSON

Dual (CommonJS + ESM) Dual package — both require() and import work

@smithy/core publishes both a CommonJS entry and a native ESM entry (ESM added in 2.1.0). require("@smithy/core") and import "@smithy/core" both work on every supported Node.js version and in Bun.

Latest
3.33.3 (Aug 20, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
3.33.3
Native ESM since
2.1.0
TypeScript types
Bundled
Node engines
>=18.0.0
License
Apache-2.0

Does @smithy/core@3.33.3 actually load? Runtime test results

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

Runtimerequire("@smithy/core")import "@smithy/core"
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✓ works✓ works

How to import @smithy/core

ES modules (import)

import core from "@smithy/core";

CommonJS (require)

const core = require("@smithy/core");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (162 versions; the newest 60 shown).

VersionsFormatFirst published
3.20.1 – 3.33.3Dual (CommonJS + ESM)Jan 7, 2026

Frequently asked

Is @smithy/core ESM-only?

@smithy/core@3.33.3 ships CommonJS and ESM builds. @smithy/core publishes both a CommonJS entry and a native ESM entry (ESM added in 2.1.0). require("@smithy/core") and import "@smithy/core" both work on every supported Node.js version and in Bun.

Can I require @smithy/core?

Yes. @smithy/core ships a CommonJS entry, so require("@smithy/core") works on every Node.js version, alongside the native ESM entry for import.

Does @smithy/core work in Bun?

Yes. import "@smithy/core" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does @smithy/core ship TypeScript types?

Yes. @smithy/core bundles its own type declarations; no @types package is needed.

Links

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