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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. Markdown · JSON

Dual (CommonJS + ESM) Dual package — require() works on every Node.js version we test; import works too

sass publishes both a CommonJS entry and a native ESM entry (ESM added in 1.63.3). require("sass") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=20.19.0. import "sass" works alongside it.

What to do

  1. Nothing to change. require("sass") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=20.19.0. import * as sass from "sass" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
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 1.4.0✓ works✓ works

How to import sass

ES modules (import)

import * as sass from "sass";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

const sass = require("sass");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (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") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=20.19.0. import "sass" works alongside it.

Can I require sass?

Yes. sass ships a CommonJS entry alongside the native ESM entry. require("sass") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=20.19.0.

Does sass work in Bun?

Yes. import "sass" loaded successfully in Bun 1.4.0 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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