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Is type-fest ESM-only? Can you require() it?

A collection of essential TypeScript types

Last verified Sep 9, 2026 against type-fest@5.9.0. Markdown · JSON

No JS entry point No JavaScript entry point

type-fest does not expose a JavaScript entry point in package.json. It is likely a CLI, a stylesheet, a type-definition package, or an asset bundle, so require() and import are not the way to use it.

What to do

  1. Do not require() or import type-fest: it has no JavaScript entry point. Use it as a CLI (npx type-fest), a stylesheet, an asset, or a type-definition package as its README describes.
  2. TypeScript: types are bundled; install nothing extra.
Latest
5.9.0 (Aug 30, 2026)
Module format
No JS entry point
Last CommonJS version
n/a
TypeScript types
Bundled
Node engines
>=20
Weekly downloads
337.8M
License
(MIT OR CC0-1.0)

Does type-fest@5.9.0 actually load? Runtime test results

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

Runtimerequire("type-fest")import "type-fest"
Node.js 18✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✗ failsERR_PACKAGE_PATH_NOT_EXPORTED
Node.js 20✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✗ failsERR_PACKAGE_PATH_NOT_EXPORTED
Node.js 22✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✗ failsERR_PACKAGE_PATH_NOT_EXPORTED
Node.js 24✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✗ failsERR_PACKAGE_PATH_NOT_EXPORTED
Node.js 26✗ failsERR_PACKAGE_PATH_NOT_EXPORTED✗ failsERR_PACKAGE_PATH_NOT_EXPORTED
Bun 1.4.0✗ failsError✗ failsError

A failing require() on a CommonJS package usually means the package needs a browser/DOM global, a peer dependency, or a native binary that is not available in a bare Node.js process.

How to import type-fest

ES modules (import)

import * as typeFest from "type-fest";

CommonJS (require)

Not applicable.

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 (193 versions; the newest 60 shown).

VersionsFormatFirst published
4.13.0 – 5.9.0No JS entry pointMar 19, 2024

Frequently asked

Is type-fest ESM-only?

type-fest@5.9.0 has no importable main entry. type-fest does not expose a JavaScript entry point in package.json. It is likely a CLI, a stylesheet, a type-definition package, or an asset bundle, so require() and import are not the way to use it.

Does type-fest work in Bun?

Importing type-fest failed in Bun 1.4.0 on Sep 9, 2026: error: Cannot find package 'type-fest' from '/Users/boat/Projects/top-seo/data/probe-work/type-fest/imp.mjs'

Does type-fest ship TypeScript types?

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

Links

Other no js entry point packages

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