# Is rollup-plugin-peer-deps-external ESM-only? Can you require() it?

> rollup-plugin-peer-deps-external@2.2.4 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Rollup plugin to automatically add a library's peerDependencies to its bundle's external config.

Last verified Sep 9, 2026 against rollup-plugin-peer-deps-external@2.2.4.

rollup-plugin-peer-deps-external ships CommonJS only. require("rollup-plugin-peer-deps-external") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "rollup-plugin-peer-deps-external" 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.

It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.

## What to do

1. require("rollup-plugin-peer-deps-external") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
2. From ES modules use the default import: import rollupPluginPeerDepsExternal from "rollup-plugin-peer-deps-external"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/rollup-plugin-peer-deps-external

## Facts

- Latest: 2.2.4 (Oct 20, 2020)
- Module format: CommonJS
- Last CommonJS version: 2.2.4
- TypeScript types: @types/rollup-plugin-peer-deps-external
- Node engines: not declared
- Weekly downloads: 343K
- License: MIT

## Runtime test results for rollup-plugin-peer-deps-external@2.2.4

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

| Runtime | require("rollup-plugin-peer-deps-external") | import "rollup-plugin-peer-deps-external" |
|---|---|---|
| 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-plugin-peer-deps-external

ES modules:

```js
import rollupPluginPeerDepsExternal from "rollup-plugin-peer-deps-external";
```

CommonJS:

```js
const rollupPluginPeerDepsExternal = require("rollup-plugin-peer-deps-external");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (9 versions; the newest 9 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 2.2.4 | CommonJS | Apr 12, 2017 |

## Frequently asked

**Is rollup-plugin-peer-deps-external ESM-only?**

rollup-plugin-peer-deps-external@2.2.4 is a CommonJS package. rollup-plugin-peer-deps-external ships CommonJS only. require("rollup-plugin-peer-deps-external") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "rollup-plugin-peer-deps-external" 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 rollup-plugin-peer-deps-external with ES module syntax?**

Yes. import rollupPluginPeerDepsExternal from "rollup-plugin-peer-deps-external" 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 rollup-plugin-peer-deps-external work in Bun?**

Yes. import "rollup-plugin-peer-deps-external" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does rollup-plugin-peer-deps-external ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/rollup-plugin-peer-deps-external".

## Links

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

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