Registry / web-framework / babel-preset-o

babel-preset-o

library0.4.3jsnpmunverified

A tiny and flexible Babel preset for React development, combining @babel/preset-env and @babel/preset-react with sensible defaults. Version 0.4.3 is the latest stable release; the package is actively maintained but has limited community adoption. It simplifies configuration by wrapping two commonly used presets into one, supporting custom options for targets, modules, useBuiltIns, and runtime mode (classic or automatic). Compared to alternatives like babel-preset-react-app, this preset is more lightweight and configurable, suitable for projects that need a minimal Babel setup without opinionated defaults.

web-framework

npm install babel-preset-o

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INSTALL

IMPORT

SIG · BABEL-PRESET-O

babel-preset-o

web-frameworkjavascriptv0.4.3

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.

babel-preset-o

✓ module.exports = { presets: ['babel-preset-o'] }

✗ module.exports = { presets: [require('babel-preset-o')] }

Use string reference in presets array; requiring is unnecessary but might work if preset is a module.

babel-preset-o with options

✓ module.exports = { presets: [['babel-preset-o', { targets: {}, modules: 'commonjs' }]] }

Options are passed as second element in an array within presets.

customize runtime

✓ module.exports = { presets: [['babel-preset-o', { runtime: 'automatic' }]] }

✗ module.exports = { presets: ['babel-preset-o', { runtime: 'automatic' }] }

When passing options, wrap the preset name and options in a sub-array.

Shows how to install and configure babel-preset-o with custom targets and options for React development.

// Install: npm i -D babel-preset-o // babel.config.js module.exports = { presets: [ ['babel-preset-o', { targets: { browsers: ['> 1%', 'last 2 versions'] }, modules: false, useBuiltIns: false, runtime: 'classic' }] ] }

Debug

Known issues

gotchaPreset options must be passed in an array format: ['babel-preset-o', options]. Omitting the array or misplacing options will silently ignore them.

fix

Use ['babel-preset-o', { ... }] in the presets array.

affects: >=0.0.0

gotchaThe 'runtime' option defaults to 'classic', which uses React.createElement. If using React 17+ JSX transform, set runtime: 'automatic' to avoid unused React imports.

fix

Set runtime: 'automatic' in preset options if using React 17+ and the new JSX transform.

affects: >=0.0.0

deprecatedThe 'useBuiltIns' option is deprecated in Babel 7.4+; prefer using @babel/polyfill or core-js directly.

fix

Consider removing useBuiltIns and installing core-js directly for polyfills.

affects: >=7.4

Errors

Common errors & fixes

Error: Cannot find module '@babel/preset-env'

Missing peer dependency @babel/preset-env

fix

npm install @babel/preset-env @babel/preset-react --save-dev

Preset options object is not being applied

Preset not wrapped in an array with name

fix

Use ['babel-preset-o', { modules: 'commonjs' }] instead of ['babel-preset-o', { modules: 'commonjs' }] (check nesting).

JSX not transpiled, React is undefined

Default runtime is 'classic', requires React in scope

fix

Set runtime: 'automatic' or add import React from 'react' in every JSX file.

Upgrade

Version history

0.4.3latest on npm

Audit

Dependencies

@babel/preset-envrequiredcore dependency for environment-based transpilation

@babel/preset-reactrequiredcore dependency for React JSX and other transforms

Agent activity

11 hits · last 30 days

node

OpenAI (training)

Resources

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