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

The core of the humanfs library.

Last verified Sep 9, 2026 against @humanfs/core@0.19.2. Markdown · JSON

ESM-only ESM-only — it has never shipped a CommonJS build

@humanfs/core has been ESM-only since its first stable release; there is no CommonJS version to pin.

require("@humanfs/core") failed in our probe on Node.js 20+ as well; see the runtime table for the error before relying on it. On Node.js 18, which has no require(esm), require("@humanfs/core") fails with ERR_REQUIRE_ESM.

What to do

  1. require("@humanfs/core") failed in our probe on Node.js 20+ as well; see the runtime table for the error before relying on it.
  2. From a CommonJS file, use a dynamic import inside an async function: const core = await import("@humanfs/core"). That works on every Node.js version the package supports (>=18.18.0).
  3. There is no CommonJS release of @humanfs/core to pin; without require(esm) the only option is a dynamic import().
  4. TypeScript: types are bundled; install nothing extra.
Latest
0.19.2 (Apr 17, 2026)
Module format
ESM-only
Last CommonJS version
none
ESM-only since
0.6.0 (Jan 30, 2024)
TypeScript types
Bundled
Node engines
>=18.18.0
Weekly downloads
57.5M
License
Apache-2.0

Does @humanfs/core@0.19.2 actually load? Runtime test results

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

Runtimerequire("@humanfs/core")import "@humanfs/core"
Node.js 18✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✓ works
Node.js 20✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✓ works
Node.js 22✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✓ works
Node.js 24✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✓ works
Node.js 26✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✓ works
Bun 1.4.0✗ failsError✓ works

How to import @humanfs/core

ES modules (import)

import * as core from "@humanfs/core";

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

CommonJS (require)

// require("@humanfs/core") failed in our probe on Node.js 20.19+, 22.12+ and newer as well (ERR_PACKAGE_PATH_NOT_EXPORTED); see the runtime table.

// Any Node.js version the package supports (>=18.18.0), from an async function:
async function main() {
  const core = await import("@humanfs/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 (19 versions; the newest 19 shown).

VersionsFormatFirst published
0.6.0 – 0.19.2ESM-onlyJan 30, 2024

Frequently asked

Is @humanfs/core ESM-only?

@humanfs/core@0.19.2 is ESM-only. @humanfs/core has been ESM-only since its first stable release; there is no CommonJS version to pin.

Which version of @humanfs/core still supports CommonJS / require()?

None. @humanfs/core has always been ESM-only. Use import, or a dynamic import("@humanfs/core") from an async function in CommonJS.

How do I use @humanfs/core from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const core = await import("@humanfs/core"). That works on every Node.js version the package supports (>=18.18.0). require("@humanfs/core") failed in our probe on Node.js 20+ as well; see the runtime table for the error before relying on it.

Does @humanfs/core work in Bun?

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

Does @humanfs/core ship TypeScript types?

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

Links

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