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

Parse CSS and add vendor prefixes to CSS rules using values from the Can I Use website

Last verified Sep 9, 2026 against autoprefixer@10.5.5. JSON

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

autoprefixer ships CommonJS only. require("autoprefixer") works everywhere. import "autoprefixer" 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
10.5.5 (Sep 4, 2026)
Module format
CommonJS
Last CommonJS version
10.5.5
TypeScript types
Bundled
Node engines
^10 || ^12 || >=14
Weekly downloads
56.7M
License
MIT

Does autoprefixer@10.5.5 actually load? Runtime test results

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

Runtimerequire("autoprefixer")import "autoprefixer"
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 autoprefixer

ES modules (import)

import autoprefixer from "autoprefixer";

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 autoprefixer = require("autoprefixer");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (257 versions; the newest 60 shown).

VersionsFormatFirst published
9.8.4 – 10.5.5CommonJSJun 24, 2020

Frequently asked

Is autoprefixer ESM-only?

autoprefixer@10.5.5 is a CommonJS package. autoprefixer ships CommonJS only. require("autoprefixer") works everywhere. import "autoprefixer" 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 autoprefixer with ES module syntax?

Yes. import autoprefixer from "autoprefixer" 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 autoprefixer work in Bun?

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

Does autoprefixer ship TypeScript types?

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

Links

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