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Is jest ESM-only? Can you require() it?

Delightful JavaScript Testing.

Last verified Sep 9, 2026 against jest@30.5.1. Markdown · JSON

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

jest publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("jest") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0. import "jest" works alongside it.

What to do

  1. Nothing to change. require("jest") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0. import * as jest from "jest" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
30.5.1 (Sep 1, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
30.5.1
Native ESM since
30.0.0
TypeScript types
Bundled
Node engines
^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0
Weekly downloads
42.1M
License
MIT

Does jest@30.5.1 actually load? Runtime test results

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

Runtimerequire("jest")import "jest"
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 jest

ES modules (import)

import * as jest from "jest";

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

CommonJS (require)

const jest = require("jest");

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 (237 versions; the newest 60 shown).

VersionsFormatFirst published
30.0.0 – 30.5.1Dual (CommonJS + ESM)Jun 10, 2025
27.3.0 – 29.7.0CommonJSOct 17, 2021

Frequently asked

Is jest ESM-only?

jest@30.5.1 ships CommonJS and ESM builds. jest publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("jest") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0. import "jest" works alongside it.

Can I require jest?

Yes. jest ships a CommonJS entry alongside the native ESM entry. require("jest") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0.

Does jest work in Bun?

Yes. import "jest" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does jest ship TypeScript types?

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

Links

Other dual (commonjs + esm) packages

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