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

> gulp-postcss@10.0.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

PostCSS gulp plugin

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

gulp-postcss ships CommonJS only. require("gulp-postcss") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18. import "gulp-postcss" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

## What to do

1. require("gulp-postcss") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18.
2. From ES modules use the default import: import gulpPostcss from "gulp-postcss"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/gulp-postcss

## Facts

- Latest: 10.0.0 (Feb 6, 2024)
- Module format: CommonJS
- Last CommonJS version: 10.0.0
- TypeScript types: @types/gulp-postcss
- Node engines: >=18
- Weekly downloads: 225K
- License: MIT

## Runtime test results for gulp-postcss@10.0.0

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

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

ES modules:

```js
import gulpPostcss from "gulp-postcss";
```

CommonJS:

```js
const gulpPostcss = require("gulp-postcss");
```

## 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 |
|---|---|---|
| 0.0.1 – 10.0.0 | CommonJS | Aug 17, 2014 |

## Frequently asked

**Is gulp-postcss ESM-only?**

gulp-postcss@10.0.0 is a CommonJS package. gulp-postcss ships CommonJS only. require("gulp-postcss") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18. import "gulp-postcss" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

**Can I import gulp-postcss with ES module syntax?**

Yes. import gulpPostcss from "gulp-postcss" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

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

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

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

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

## Links

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

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