Registry / devops / modify-babel-preset

modify-babel-preset

library3.2.1jsnpmunverified

Utility to create a modified Babel preset by cloning an existing preset and applying plugin additions, removals, or configuration overrides. Current version 3.2.1. Helps avoid manual preset duplication by flattening nested presets into a single plugin list and applying transformations. Key differentiator: plugin filtering works on resolved filenames for precise matching. Works best with npm 3. Release cadence: sporadic, last release 2017.

devops

npm install modify-babel-preset

github ↗package ↗

INSTALL

IMPORT

SIG · MODIFY-BABEL-PRESE

modify-babel-preset

devopsjavascriptv3.2.1

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.

default

✓ import modifyBabelPreset from 'modify-babel-preset'

✗ const modifyBabelPreset = require('modify-babel-preset')

ESM supported; require works in CJS contexts. Main export is a function.

default (CommonJS)

✓ const modifyBabelPreset = require('modify-babel-preset')

CommonJS style with require. The package provides a single default function.

default (ESM named import)

✓ import { modifyBabelPreset } from 'modify-babel-preset'

No named export; must use default import. Common mistake to destructure.

Creates a modified preset by removing the typeof-symbol transform and adding the React JSX transform to the es2015 preset.

const modifyBabelPreset = require('modify-babel-preset'); // Remove 'transform-es2015-typeof-symbol' and add 'transform-react-jsx' from the es2015 preset module.exports = modifyBabelPreset('es2015', { 'transform-es2015-typeof-symbol': false, 'transform-react-jsx': true });

Debug

Known issues

breakingIn v3.0.0, plugin paths are now resolved to filenames for matching; transformations must use plugin filenames (e.g., 'babel-plugin-transform-es2015-typeof-symbol' or its short name).

fix

Ensure plugin names in the modifications object match the resolved filename (short name works, but avoid full relative paths).

affects: >=3.0.0

gotchaThe preset must be installed as a dependency; modification does not install the preset automatically.

fix

Run 'npm install <preset-name>' before using modify-babel-preset.

affects: all

gotchaNested presets are flattened into a single plugins list; if a preset has nested presets, the resulting configuration may differ from the original preset's runtime behavior.

fix

Verify the final plugin order and configuration matches expectations, especially for presets that depend on ordering.

affects: all

deprecatedThis package is in maintenance mode; Babel 7+ uses @babel/preset-env and presets are less commonly modified in this way.

fix

Consider using babel-preset-env or write your own preset programmatically.

affects: >=3.0.0

Errors

Common errors & fixes

Cannot find module 'babel-preset-<name>'

Missing installed preset as a dependency.

fix

npm install <preset-name> --save-dev

Plugin '<name>' is not a valid plugin

Plugin name not recognized; may need full babel-plugin- prefix or incorrect name.

fix

Use the correct plugin name (e.g., 'transform-react-jsx' or 'babel-plugin-transform-react-jsx').

Expected a string for preset name

The first argument to modifyBabelPreset must be a preset name string.

fix

modifyBabelPreset('es2015', {...})

Upgrade

Version history

3.2.1latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/developit/modify-babel-preset ↗

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