rust-sass-wasm

The sass JS API backed by the rust-sass compiler running on WebAssembly — a pure-JS install with no native binary and no Sass Embedded Protocol.

If you want the native binary instead, use sass-embedded-rust (the same compiler as an embedded-protocol host).

Try it in the browser: playground (runs this build locally — live CSS, source maps, and warnings/errors).

Install

npm install rust-sass-wasm

Requires Node.js >=18.0.0.

Usage

import { compileString } from "rust-sass-wasm";

compileString("a {b: 1px + 2px}").css;

// CommonJS
const { compileString } = require("rust-sass-wasm");

String compilation (compileString, compileStringAsync) and file-based compilation (compile, compileAsync) with importers, custom functions, the Value classes, Logger, deprecations, NodePackageImporter, and the Compiler API all work as in sass. The sass command line is included:

npx sass input.scss output.css

Versioning

Version tracks dart-sass (1.104.0).

Links

• Repository (compiler source).
• Architecture and build docs.
• Playground (runs this build in the browser).

License

MIT.