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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. JSON

Dual (CommonJS + ESM) Dual package — both require() and import work

rollup publishes both a CommonJS entry and a native ESM entry (ESM added in 2.0.0). require("rollup") and import "rollup" both work on every supported Node.js version and in Bun.

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✓ works✓ works

How to import rollup

ES modules (import)

import rollup from "rollup";

CommonJS (require)

const rollup = require("rollup");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (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") and import "rollup" both work on every supported Node.js version and in Bun.

Can I require rollup?

Yes. rollup ships a CommonJS entry, so require("rollup") works on every Node.js version, alongside the native ESM entry for import.

Does rollup work in Bun?

Yes. import "rollup" loaded successfully in Bun 1.4 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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