Registry / devops / corejs-upgrade-webpack-plugin

corejs-upgrade-webpack-plugin

library4.0.1jsnpmunverified

A webpack plugin that transforms core-js v2 require/module paths to core-js v3 counterparts during bundling. Current stable version is 4.0.1 with maintenance-level releases. It resolves mismatched core-js versions by mapping old path patterns to new ones, preventing bundle bloat and runtime errors from library dependencies. Supports custom resolve directories via resolveFrom option. Released intermittently; uses core-js's path mapping to ensure the latest core-js is used everywhere. Differentiator: automates migration in existing webpack setups without manual code changes.

devops

npm install corejs-upgrade-webpack-plugin

github ↗package ↗

INSTALL

IMPORT

SIG · COREJS-UPGRADE-WEB

corejs-upgrade-webpack-plugin

devopsjavascriptv4.0.1

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 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

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

CoreJSUpgradeWebpackPlugin

✓ import CoreJSUpgradeWebpackPlugin from 'corejs-upgrade-webpack-plugin'

✗ const CoreJSUpgradeWebpackPlugin = require('corejs-upgrade-webpack-plugin')

ESM-only; default import. CommonJS require will fail.

CoreJSUpgradeWebpackPlugin

✓ const { CoreJSUpgradeWebpackPlugin } = require('corejs-upgrade-webpack-plugin')

✗ const CoreJSUpgradeWebpackPlugin = require('corejs-upgrade-webpack-plugin').default

For CommonJS, use named destructuring. Default export is not available.

Options

✓ import type { Options } from 'corejs-upgrade-webpack-plugin'

Use type import for TypeScript, not value import.

Demonstrates ESM import and plugin instantiation with optional resolveFrom option for custom core-js resolution path.

// webpack.config.js import CoreJSUpgradeWebpackPlugin from 'corejs-upgrade-webpack-plugin'; export default { plugins: [ new CoreJSUpgradeWebpackPlugin({ resolveFrom: [process.cwd()], }), ], };

Debug

Known issues

breakingVersion 3.0.0 changed options structure; resolveFrom now expects an array.

fix

Update resolveFrom to an array: new CoreJSUpgradeWebpackPlugin({ resolveFrom: [path] })

affects: <3.0.0

deprecatedThe plugin is in maintenance mode; no new features planned.

fix

Consider using built-in webpack resolve.alias for core-js if applicable.

affects: >=0.0.0

gotchaPlugin only transforms paths that match /core-js/; nested references may be missed.

fix

Manually audit dependencies if multiple core-js versions remain.

affects: >=0.0.0

Errors

Common errors & fixes

Cannot find module 'corejs-upgrade-webpack-plugin'

Attempting to require the plugin via CommonJS require.

fix

Use ESM import statement or use .mjs extension.

TypeError: CoreJSUpgradeWebpackPlugin is not a constructor

Wrong import style, e.g., using default import when plugin is exported as named.

fix

Use import CoreJSUpgradeWebpackPlugin from 'corejs-upgrade-webpack-plugin' (ESM) or const { CoreJSUpgradeWebpackPlugin } = require('...') (CJS).

Upgrade

Version history

4.0.1latest on npm

Audit

Dependencies

core-jsrequiredThe plugin resolves core-js v2 paths against core-js v3 structure; core-js must be installed.

webpackrequiredWebpack plugin; requires webpack as a peer dependency.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/ndelangen/corejs-upgrade-webpack-plugin ↗

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