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Is sass ESM-only? Can you require() it?

A pure JavaScript implementation of Sass.

Last verified Sep 9, 2026 against sass@1.104.0. JSON

Dual (CommonJS + ESM) Dual package — both require() and import work

sass publishes both a CommonJS entry and a native ESM entry (ESM added in 1.63.3). require("sass") and import "sass" both work on every supported Node.js version and in Bun.

Latest
1.104.0 (Sep 3, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
1.104.0
Native ESM since
1.63.3
TypeScript types
Bundled
Node engines
>=20.19.0
Weekly downloads
27.4M
License
MIT

Does sass@1.104.0 actually load? Runtime test results

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

Runtimerequire("sass")import "sass"
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✓ works✓ works

How to import sass

ES modules (import)

import sass from "sass";

CommonJS (require)

const sass = require("sass");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (308 versions; the newest 60 shown).

VersionsFormatFirst published
1.80.0 – 1.104.0Dual (CommonJS + ESM)Oct 17, 2024

Frequently asked

Is sass ESM-only?

sass@1.104.0 ships CommonJS and ESM builds. sass publishes both a CommonJS entry and a native ESM entry (ESM added in 1.63.3). require("sass") and import "sass" both work on every supported Node.js version and in Bun.

Can I require sass?

Yes. sass ships a CommonJS entry, so require("sass") works on every Node.js version, alongside the native ESM entry for import.

Does sass work in Bun?

Yes. import "sass" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does sass ship TypeScript types?

Yes. sass bundles its own type declarations; no @types package is needed.

Links

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