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

> gulp-mocha@10.0.1 is ESM-only. ESM-only since 10.0.0 — last CommonJS version is 9.0.0.

Run Mocha tests

Last verified Sep 9, 2026 against gulp-mocha@10.0.1.

gulp-mocha dropped its CommonJS build in 10.0.0 (November 2023). The last version with a plain require()-able CommonJS entry is 9.0.0, published Oct 26, 2023; it declares support for Node.js >=18.

On Node.js 20.19+, 22.12+ and newer, require("gulp-mocha") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. On Node.js 18, which has no require(esm), require("gulp-mocha") fails with ERR_REQUIRE_ESM.

## What to do

1. On Node.js 20.19+, 22.12+ and newer, require("gulp-mocha") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26.
2. From a CommonJS file, use a dynamic import inside an async function: const gulpMocha = await import("gulp-mocha"). That works on every Node.js version the package supports (>=18).
3. If you need a synchronous require() or run Node.js 18: npm install gulp-mocha@9.0.0, the last CommonJS release (published Oct 26, 2023); it declares Node.js >=18.
4. TypeScript: npm install -D @types/gulp-mocha

## Facts

- Latest: 10.0.1 (Apr 19, 2024)
- Module format: ESM-only
- Last CommonJS version: 9.0.0
- ESM-only since: 10.0.0 (Nov 3, 2023)
- TypeScript types: @types/gulp-mocha
- Node engines: >=18
- Weekly downloads: 181K
- License: MIT

## Runtime test results for gulp-mocha@10.0.1

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

| Runtime | require("gulp-mocha") | import "gulp-mocha" |
|---|---|---|
| Node.js 18 | fails (ERR_REQUIRE_ESM) | 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 gulp-mocha

ES modules:

```js
import * as gulpMocha from "gulp-mocha";
```

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

CommonJS:

```js
// Node.js 20.19+, 22.12+ and newer (verified):
const gulpMocha = require("gulp-mocha");

// Any Node.js version the package supports (>=18), from an async function:
async function main() {
  const gulpMocha = await import("gulp-mocha");
}

// Or pin the last CommonJS release (declares Node.js >=18):
// npm install gulp-mocha@9.0.0
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (39 versions; the newest 39 shown).

| Versions | Format | First published |
|---|---|---|
| 10.0.0 – 10.0.1 | ESM-only | Nov 3, 2023 |
| 0.1.0 – 9.0.0 | CommonJS | Dec 14, 2013 |

## Frequently asked

**Is gulp-mocha ESM-only?**

gulp-mocha@10.0.1 is ESM-only. gulp-mocha dropped its CommonJS build in 10.0.0 (November 2023). The last version with a plain require()-able CommonJS entry is 9.0.0, published Oct 26, 2023; it declares support for Node.js >=18.

**Which version of gulp-mocha still supports CommonJS / require()?**

9.0.0 is the last version of gulp-mocha with a CommonJS build; it declares Node.js >=18. Install it with "npm install gulp-mocha@9.0.0". Every version from 10.0.0 on is ESM-only.

**How do I use gulp-mocha from a CommonJS file?**

From a CommonJS file, use a dynamic import inside an async function: const gulpMocha = await import("gulp-mocha"). That works on every Node.js version the package supports (>=18). On Node.js 20.19+, 22.12+ and newer, require("gulp-mocha") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin gulp-mocha@9.0.0 (declares Node.js >=18).

**Does gulp-mocha work in Bun?**

Yes. import "gulp-mocha" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does gulp-mocha ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/gulp-mocha".

## Links

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

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