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Is @adobe/css-tools ESM-only? Can you require() it?

A modern CSS parser and stringifier with TypeScript support

Last verified Sep 9, 2026 against @adobe/css-tools@4.5.0. Markdown · JSON

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

@adobe/css-tools publishes both a CommonJS entry and a native ESM entry (ESM added in 4.1.0). require("@adobe/css-tools") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@adobe/css-tools" works alongside it.

What to do

  1. Nothing to change. require("@adobe/css-tools") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import * as cssTools from "@adobe/css-tools" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
4.5.0 (May 21, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
4.5.0
Native ESM since
4.1.0
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
39.3M
License
MIT

Does @adobe/css-tools@4.5.0 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("@adobe/css-tools") from a CommonJS file and import "@adobe/css-tools" from an ES module.

Runtimerequire("@adobe/css-tools")import "@adobe/css-tools"
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 @adobe/css-tools

ES modules (import)

import * as cssTools from "@adobe/css-tools";

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

CommonJS (require)

const cssTools = require("@adobe/css-tools");

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 (15 versions; the newest 15 shown).

VersionsFormatFirst published
4.1.0 – 4.5.0Dual (CommonJS + ESM)Jan 25, 2023
4.0.0 – 4.0.2CommonJSJul 14, 2022

Frequently asked

Is @adobe/css-tools ESM-only?

@adobe/css-tools@4.5.0 ships CommonJS and ESM builds. @adobe/css-tools publishes both a CommonJS entry and a native ESM entry (ESM added in 4.1.0). require("@adobe/css-tools") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@adobe/css-tools" works alongside it.

Can I require @adobe/css-tools?

Yes. @adobe/css-tools ships a CommonJS entry alongside the native ESM entry. require("@adobe/css-tools") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.

Does @adobe/css-tools work in Bun?

Yes. import "@adobe/css-tools" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does @adobe/css-tools ship TypeScript types?

Yes. @adobe/css-tools bundles its own type declarations; no @types package is needed.

Links

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