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

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Last verified Sep 9, 2026 against @swc/core@1.16.2. Markdown · JSON

CommonJS CommonJS — require() works on every Node.js version we test

@swc/core ships CommonJS only. require("@swc/core") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10. import "@swc/core" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

What to do

  1. require("@swc/core") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.
  2. From ES modules use the default import: import core from "@swc/core"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: types are bundled; install nothing extra.
Latest
1.16.2 (Sep 4, 2026)
Module format
CommonJS
Last CommonJS version
1.16.2
TypeScript types
Bundled
Node engines
>=10
Weekly downloads
30.3M
License
Apache-2.0

Does @swc/core@1.16.2 actually load? Runtime test results

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

Runtimerequire("@swc/core")import "@swc/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 1.4.0✓ works✓ works

How to import @swc/core

ES modules (import)

import core from "@swc/core";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

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

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 (575 versions; the newest 60 shown).

VersionsFormatFirst published
1.11.12 – 1.16.2CommonJSMar 23, 2025

Frequently asked

Is @swc/core ESM-only?

@swc/core@1.16.2 is a CommonJS package. @swc/core ships CommonJS only. require("@swc/core") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10. import "@swc/core" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import @swc/core with ES module syntax?

Yes. import core from "@swc/core" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

Does @swc/core work in Bun?

Yes. import "@swc/core" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does @swc/core ship TypeScript types?

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

Links

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