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

> jest@30.5.1 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Delightful JavaScript Testing.

Last verified Sep 9, 2026 against jest@30.5.1.

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.

## Facts

- 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

## Runtime test results for jest@30.5.1

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

| Runtime | require("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:

```js
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:

```js
const jest = require("jest");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (237 versions; the newest 60 shown).

| Versions | Format | First published |
|---|---|---|
| 30.0.0 – 30.5.1 | Dual (CommonJS + ESM) | Jun 10, 2025 |
| 27.3.0 – 29.7.0 | CommonJS | Oct 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

- [jest on npm](https://www.npmjs.com/package/jest)
- [Source repository](https://github.com/jestjs/jest)
- [HTML version](https://canirequire.com/package/jest/)
- [JSON version](https://canirequire.com/package/jest.json)

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