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

> gulp-autoprefixer@10.0.0 is ESM-only. ESM-only since 9.0.0 — last CommonJS version is 8.0.0.

Prefix CSS

Last verified Sep 9, 2026 against gulp-autoprefixer@10.0.0.

gulp-autoprefixer dropped its CommonJS build in 9.0.0 (November 2023). The last version with a plain require()-able CommonJS entry is 8.0.0, published May 29, 2021; it declares support for Node.js >=12.

On Node.js 20.19+, 22.12+ and newer, require("gulp-autoprefixer") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Node.js 18 has no require(esm), and gulp-autoprefixer@10.0.0 declares Node.js >=20, so 18 is outside its supported range anyway.

gulp-autoprefixer@10.0.0 declares engines ">=20", so Node.js 18 is outside its supported range regardless of module format.

## What to do

1. On Node.js 20.19+, 22.12+ and newer, require("gulp-autoprefixer") 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 gulpAutoprefixer = await import("gulp-autoprefixer"). That works on every Node.js version the package supports (>=20).
3. If you need a synchronous require() or run Node.js 18: npm install gulp-autoprefixer@8.0.0, the last CommonJS release (published May 29, 2021); it declares Node.js >=12.
4. gulp-autoprefixer@10.0.0 declares engines ">=20", so Node.js 18 is unsupported regardless: upgrade Node.js or pin an older release.
5. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 10.0.0 (Sep 11, 2025)
- Module format: ESM-only
- Last CommonJS version: 8.0.0
- ESM-only since: 9.0.0 (Nov 2, 2023)
- TypeScript types: bundled
- Node engines: >=20
- Weekly downloads: 210K
- License: MIT

## Runtime test results for gulp-autoprefixer@10.0.0

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

| Runtime | require("gulp-autoprefixer") | import "gulp-autoprefixer" |
|---|---|---|
| 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-autoprefixer

ES modules:

```js
import * as gulpAutoprefixer from "gulp-autoprefixer";
```

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 gulpAutoprefixer = require("gulp-autoprefixer");

// Any Node.js version the package supports (>=20), from an async function:
async function main() {
  const gulpAutoprefixer = await import("gulp-autoprefixer");
}

// Or pin the last CommonJS release (declares Node.js >=12):
// npm install gulp-autoprefixer@8.0.0
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (32 versions; the newest 32 shown).

| Versions | Format | First published |
|---|---|---|
| 9.0.0 – 10.0.0 | ESM-only | Nov 2, 2023 |
| 0.0.1 – 8.0.0 | CommonJS | Dec 1, 2013 |

## Frequently asked

**Is gulp-autoprefixer ESM-only?**

gulp-autoprefixer@10.0.0 is ESM-only. gulp-autoprefixer dropped its CommonJS build in 9.0.0 (November 2023). The last version with a plain require()-able CommonJS entry is 8.0.0, published May 29, 2021; it declares support for Node.js >=12.

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

8.0.0 is the last version of gulp-autoprefixer with a CommonJS build; it declares Node.js >=12. Install it with "npm install gulp-autoprefixer@8.0.0". Every version from 9.0.0 on is ESM-only.

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

From a CommonJS file, use a dynamic import inside an async function: const gulpAutoprefixer = await import("gulp-autoprefixer"). That works on every Node.js version the package supports (>=20). On Node.js 20.19+, 22.12+ and newer, require("gulp-autoprefixer") 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-autoprefixer@8.0.0 (declares Node.js >=12).

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

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

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

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

## Links

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

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