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

> rollup@4.63.1 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Next-generation ES module bundler

Last verified Sep 9, 2026 against rollup@4.63.1.

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.

## Facts

- 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

## Runtime test results for rollup@4.63.1

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

| Runtime | require("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:

```js
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:

```js
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).

| Versions | Format | First published |
|---|---|---|
| 4.41.2 – 4.63.1 | Dual (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

- [rollup on npm](https://www.npmjs.com/package/rollup)
- [Source repository](https://github.com/rollup/rollup)
- [HTML version](https://canirequire.com/package/rollup/)
- [JSON version](https://canirequire.com/package/rollup.json)

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