Registry / devops / rollup-plugin-corejs

rollup-plugin-corejs

library1.0.2jsnpmunverified

A Rollup plugin that injects core-js polyfills based on browserslist configuration. Current stable version is 1.0.2, supporting Rollup 3 and 4. It acts as a wrapper around core-js-builder, enabling polyfill injection without Babel. Key differentiator: similar to Babel's useBuiltIns: 'usage' option, it can detect which APIs are used in your code and include only those polyfills, reducing bundle size. Enforces Node >=20. ESM-only module, ships TypeScript types. Release cadence is low, with occasional dependency updates.

devops web-framework

npm install rollup-plugin-corejs

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-CORE

rollup-plugin-corejs

devopsjavascriptv1.0.2

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

corejsPlugin

✓ import { corejsPlugin } from 'rollup-plugin-corejs'

✗ const corejsPlugin = require('rollup-plugin-corejs')

Package is ESM-only; CommonJS require is not supported.

corejsPlugin

✓ const { corejsPlugin } = await import('rollup-plugin-corejs')

✗ const { corejsPlugin } = require('rollup-plugin-corejs')

In dynamic import scenarios, use await import.

corejsPlugin (type import)

✓ import type { Options } from 'rollup-plugin-corejs'

✗ import { Options } from 'rollup-plugin-corejs'

Options type is not exported as a value, only type.

Shows basic Rollup configuration using the plugin with core-js/es modules and usage-based polyfill detection.

import { corejsPlugin } from 'rollup-plugin-corejs'; import { defineConfig } from 'rollup'; export default defineConfig({ input: 'src/index.js', plugins: [ corejsPlugin({ // Use polyfills for ES features only modules: 'core-js/es', // Only include polyfills for APIs used in your code usage: true, // Optionally specify targets (defaults to browserslist) targets: '> 0.5%, not dead' }) ], output: { file: 'dist/bundle.js', format: 'es' } });

Debug

Known issues

gotchaUsage-based polyfill detection only analyzes your own code, not third-party dependencies.

fix

If third-party polyfills are needed, consider adding them separately or using a different strategy.

affects: >=1.0.0

breakingv1.0.0 removed the 'summary' option. Using it will throw an error.

fix

Remove the summary option from plugin configuration.

affects: >=1.0.0

deprecatedRollup 3 support is deprecated; future versions may only support Rollup 4.

fix

Upgrade to Rollup 4 as soon as possible.

affects: >=1.0.0

gotchaNode.js version must be >=20.0.0. Older versions will fail to load the plugin.

fix

Upgrade Node.js to version 20 or later.

affects: >=1.0.0

gotchaThe package is ESM-only. If your Rollup config uses CommonJS, you must migrate to ESM or use dynamic import.

fix

Rename rollup.config.js to rollup.config.mjs or use top-level await with dynamic import.

affects: >=1.0.0

Errors

Common errors & fixes

ERR_REQUIRE_ESM: require() of ES Module from rollup-plugin-corejs not supported.

The package is ESM-only but imported using require() in a CommonJS context.

fix

Use import { corejsPlugin } from 'rollup-plugin-corejs' in your Rollup config, or rename the file to .mjs.

TypeError: corejsPlugin is not a function

Improper import or destructuring, e.g., const corejsPlugin = require('rollup-plugin-corejs') returns the module object, not the function directly.

fix

Use destructuring: const { corejsPlugin } = await import('rollup-plugin-corejs') or ESM import.

Error: Cannot find module 'core-js-builder'

core-js-builder is a dependency of the plugin, but it may fail to resolve in some environments.

fix

Ensure core-js is installed as a dev dependency: npm install -D core-js

Upgrade

Version history

1.0.2latest on npm

Audit

Dependencies

rolluprequiredpeer dependency, required as the plugin host

Agent activity

6 hits · last 30 days

node

Anthropic

Resources

githubhttps://github.com/susnux/rollup-plugin-corejs ↗

packagehttps://www.npmjs.com/package/rollup-plugin-corejs ↗