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

Stylus loader for webpack

Last verified Sep 9, 2026 against stylus-loader@9.0.0. Markdown · JSON

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

stylus-loader publishes both a CommonJS entry and a native ESM entry (ESM added in 9.0.0). require("stylus-loader") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 22.11.0. import "stylus-loader" works alongside it.

What to do

  1. Nothing to change. require("stylus-loader") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 22.11.0. import * as stylusLoader from "stylus-loader" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
9.0.0 (May 25, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
9.0.0
Native ESM since
9.0.0
TypeScript types
Bundled
Node engines
>= 22.11.0
Weekly downloads
1.0M
License
MIT

Does stylus-loader@9.0.0 actually load? Runtime test results

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

Runtimerequire("stylus-loader")import "stylus-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 1.4.0✓ works✓ works

How to import stylus-loader

ES modules (import)

import * as stylusLoader from "stylus-loader";

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

CommonJS (require)

const stylusLoader = require("stylus-loader");

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 (60 versions; the newest 60 shown).

VersionsFormatFirst published
9.0.0Dual (CommonJS + ESM)May 25, 2026
0.1.0 – 8.1.3CommonJSNov 5, 2013

Frequently asked

Is stylus-loader ESM-only?

stylus-loader@9.0.0 ships CommonJS and ESM builds. stylus-loader publishes both a CommonJS entry and a native ESM entry (ESM added in 9.0.0). require("stylus-loader") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 22.11.0. import "stylus-loader" works alongside it.

Can I require stylus-loader?

Yes. stylus-loader ships a CommonJS entry alongside the native ESM entry. require("stylus-loader") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 22.11.0.

Does stylus-loader work in Bun?

Yes. import "stylus-loader" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does stylus-loader ship TypeScript types?

Yes. stylus-loader bundles its own type declarations; no @types package is needed.

Links

Other dual (commonjs + esm) packages

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