sassOptions

sassOptions allow you to configure the Sass compiler.

import type { NextConfig } from 'next'   const sassOptions = {  additionalData: `  $var: red;  `, }   const nextConfig: NextConfig = {  sassOptions: {  ...sassOptions,  implementation: 'sass-embedded',  }, }   export default 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.