Registry / web-framework / babel-preset-react-union

babel-preset-react-union

library0.20.0jsnpmunverified

Babel preset for React Union, version 0.20.0. It provides a shared Babel configuration used in Lundegaard projects to streamline React integration into legacy systems. The preset includes necessary plugins and presets for modern JavaScript and React transformations. Release cadence is low; it's part of the react-union monorepo. Key differentiators: tailored for micro-frontends and gradual adoption in legacy codebases, with support for dynamic loading and shared dependencies.

web-framework

npm install babel-preset-react-union

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · BABEL-PRESET-REACT

babel-preset-react-union

web-frameworkjavascriptv0.20.0

Install

—

Import

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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.

default

✓ module.exports = require('babel-preset-react-union')

✗ import preset from 'babel-preset-react-union'

CommonJS module; use require in .babelrc or babel.config.js

default

✓ { "presets": ["react-union"] }

✗ { "presets": ["babel-preset-react-union"] }

In Babel config files, use the shorthand name 'react-union'

createReactUnionPreset

✓ const createReactUnionPreset = require('babel-preset-react-union').createReactUnionPreset

✗ import { createReactUnionPreset } from 'babel-preset-react-union'

CommonJS export; no ESM wrapper

Configure Babel to use the react-union preset with browser targets and core-js polyfill options.

// babel.config.js module.exports = { presets: [ ['react-union', { targets: { browsers: '> 0.25%, not dead' }, useBuiltIns: 'usage', corejs: 3 }] ] };

Debug

Known issues

gotchaPreset name must be 'react-union' not 'babel-preset-react-union' in Babel config

fix

Use 'react-union' as the preset name in your Babel configuration.

affects: >=0.1.0

deprecatedSupport for core-js@2 is deprecated; use core-js@3

fix

Install core-js@3 and set corejs: 3 in preset options.

affects: >=0.15.0

deprecatedPreset option 'useBuiltIns' defaulted to 'entry' in older versions; now defaults to 'usage'

fix

Explicitly set useBuiltIns to 'entry' if you need entry-point polyfilling.

affects: >=0.12.0

Errors

Common errors & fixes

Error: Cannot find module 'babel-preset-react-union'

Babel config uses full package name 'babel-preset-react-union' instead of shorthand 'react-union'

fix

Change preset name to 'react-union' in your Babel configuration.

error: ".browserslistrc" is not a valid browserslist query

Invalid syntax in browserslist configuration

fix

Ensure browserslist queries are valid (e.g., '> 0.25%, not dead').

Upgrade

Version history

0.20.0latest on npm

Audit

Dependencies

@babel/corerequiredPeer dependency required for Babel transformation

core-jsoptionalPeer dependency for polyfilling modern JavaScript features

Agent activity

10 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/lundegaard/react-union ↗

packagehttps://www.npmjs.com/package/babel-preset-react-union ↗

homepagehttps://lundegaard.eu ↗