sassOptions | Next.js English

sassOptions allow you to configure the Sass compiler.

TypeScript

JavaScript

next.config.ts

import type { NextConfig } from 'next'

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

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

export default nextConfig

next.config.js

/** @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.