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

> postcss-scss@4.0.9 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

SCSS parser for PostCSS

Last verified Sep 9, 2026 against postcss-scss@4.0.9.

postcss-scss publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("postcss-scss") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=12.0. import "postcss-scss" works alongside it.

## What to do

1. Nothing to change. require("postcss-scss") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=12.0. import * as postcssScss from "postcss-scss" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 4.0.9 (Sep 28, 2023)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 4.0.9
- Native ESM since: 3.0.0
- TypeScript types: bundled
- Node engines: >=12.0
- Weekly downloads: 5.2M
- License: MIT

## Runtime test results for postcss-scss@4.0.9

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

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

ES modules:

```js
import * as postcssScss from "postcss-scss";
```

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

CommonJS:

```js
const postcssScss = require("postcss-scss");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (42 versions; the newest 42 shown).

| Versions | Format | First published |
|---|---|---|
| 3.0.0 – 4.0.9 | Dual (CommonJS + ESM) | Sep 15, 2020 |
| 0.1.0 – 2.1.1 | CommonJS | Aug 19, 2015 |

## Frequently asked

**Is postcss-scss ESM-only?**

postcss-scss@4.0.9 ships CommonJS and ESM builds. postcss-scss publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("postcss-scss") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=12.0. import "postcss-scss" works alongside it.

**Can I require postcss-scss?**

Yes. postcss-scss ships a CommonJS entry alongside the native ESM entry. require("postcss-scss") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=12.0.

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

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

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

Yes. postcss-scss bundles its own type declarations; no @types package is needed.

## Links

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

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