# Is @jest/source-map ESM-only? Can you require() it?

> @jest/source-map@30.5.0 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Applies source maps to stack traces, so a failing test points at the code you wrote rather than at the code Jest ran.

Last verified Sep 9, 2026 against @jest/source-map@30.5.0.

@jest/source-map publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("@jest/source-map") 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/source-map" works alongside it.

## What to do

1. Nothing to change. require("@jest/source-map") 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 sourceMap from "@jest/source-map" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 30.5.0 (Aug 28, 2026)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 30.5.0
- 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: 34.8M
- License: MIT

## Runtime test results for @jest/source-map@30.5.0

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

| Runtime | require("@jest/source-map") | import "@jest/source-map" |
|---|---|---|
| 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/source-map

ES modules:

```js
import * as sourceMap from "@jest/source-map";
```

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

CommonJS:

```js
const sourceMap = require("@jest/source-map");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (30 versions; the newest 30 shown).

| Versions | Format | First published |
|---|---|---|
| 30.0.0 – 30.5.0 | Dual (CommonJS + ESM) | Jun 10, 2025 |
| 24.3.0 – 29.6.3 | CommonJS | Mar 7, 2019 |

## Frequently asked

**Is @jest/source-map ESM-only?**

@jest/source-map@30.5.0 ships CommonJS and ESM builds. @jest/source-map publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("@jest/source-map") 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/source-map" works alongside it.

**Can I require @jest/source-map?**

Yes. @jest/source-map ships a CommonJS entry alongside the native ESM entry. require("@jest/source-map") 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/source-map work in Bun?**

Yes. import "@jest/source-map" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does @jest/source-map ship TypeScript types?**

Yes. @jest/source-map bundles its own type declarations; no @types package is needed.

## Links

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

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