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

fast sass loader for Webpack

Last verified Sep 9, 2026 against fast-sass-loader@2.0.1. JSON

CommonJS CommonJS — require() works on every Node.js version

fast-sass-loader ships CommonJS only. require("fast-sass-loader") works everywhere. import "fast-sass-loader" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Latest
2.0.1 (Nov 18, 2021)
Module format
CommonJS
Last CommonJS version
2.0.1
TypeScript types
None
Node engines
not declared
Weekly downloads
14K
License
MIT

Does fast-sass-loader@2.0.1 actually load? Runtime test results

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

Runtimerequire("fast-sass-loader")import "fast-sass-loader"
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 fast-sass-loader

ES modules (import)

import fastSassLoader from "fast-sass-loader";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const fastSassLoader = require("fast-sass-loader");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (27 versions; the newest 27 shown).

VersionsFormatFirst published
1.0.0 – 2.0.1CommonJSAug 21, 2016

Frequently asked

Is fast-sass-loader ESM-only?

fast-sass-loader@2.0.1 is a CommonJS package. fast-sass-loader ships CommonJS only. require("fast-sass-loader") works everywhere. import "fast-sass-loader" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import fast-sass-loader with ES module syntax?

Yes. import fastSassLoader from "fast-sass-loader" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

Does fast-sass-loader work in Bun?

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

Does fast-sass-loader ship TypeScript types?

No. fast-sass-loader ships no type declarations and there is no @types package for it.

Links

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