---
title: sassOptions
description: Configure Sass options.
url: "https://nextjs.org/docs/app/api-reference/config/next-config-js/sassOptions"
version: 16.2.2
lastUpdated: 2026-04-02
prerequisites:
  - "Configuration: /docs/app/api-reference/config"
  - "next.config.js: /docs/app/api-reference/config/next-config-js"
---


`sassOptions` allow you to configure the Sass compiler.

```ts filename="next.config.ts" switcher
import type { NextConfig } from 'next'

const sassOptions = {
  additionalData: `
    $var: red;
  `,
}

const nextConfig: NextConfig = {
  sassOptions: {
    ...sassOptions,
    implementation: 'sass-embedded',
  },
}

export default nextConfig
```

```js filename="next.config.js" switcher
/** @type {import('next').NextConfig} */

const sassOptions = {
  additionalData: `
    $var: red;
  `,
}

const nextConfig = {
  sassOptions: {
    ...sassOptions,
    implementation: 'sass-embedded',
  },
}

module.exports = nextConfig
```

> **Good to know:**
>
> * `sassOptions` are not typed outside of `implementation` because Next.js does not maintain the other possible properties.
> * The `functions` property for defining custom Sass functions is only supported with webpack. When using Turbopack, custom Sass functions are not available because Turbopack's Rust-based architecture cannot directly execute JavaScript functions passed through this option.
---

For a semantic overview of all documentation, see [/docs/sitemap.md](/docs/sitemap.md)

For an index of all available documentation, see [/docs/llms.txt](/docs/llms.txt)