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

Next-generation ES module bundler

Last verified Sep 9, 2026 against rollup@4.63.1. Markdown · JSON

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

rollup publishes both a CommonJS entry and a native ESM entry (ESM added in 2.0.0). require("rollup") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18.0.0. import "rollup" works alongside it.

What to do

  1. Nothing to change. require("rollup") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18.0.0. import * as rollup from "rollup" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
4.63.1 (Aug 28, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
4.63.1
Native ESM since
2.0.0
TypeScript types
Bundled
Node engines
>=18.0.0
Weekly downloads
109.6M
License
MIT

Does rollup@4.63.1 actually load? Runtime test results

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

Runtimerequire("rollup")import "rollup"
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 rollup

ES modules (import)

import * as rollup from "rollup";

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

CommonJS (require)

const rollup = require("rollup");

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 (862 versions; the newest 60 shown).

VersionsFormatFirst published
4.41.2 – 4.63.1Dual (CommonJS + ESM)Jun 6, 2025

Frequently asked

Is rollup ESM-only?

rollup@4.63.1 ships CommonJS and ESM builds. rollup publishes both a CommonJS entry and a native ESM entry (ESM added in 2.0.0). require("rollup") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18.0.0. import "rollup" works alongside it.

Can I require rollup?

Yes. rollup ships a CommonJS entry alongside the native ESM entry. require("rollup") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=18.0.0.

Does rollup work in Bun?

Yes. import "rollup" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does rollup ship TypeScript types?

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

Links

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