Registry / devops / babel-preset-optimizations

babel-preset-optimizations

library2.0.0jsnpmunverified

Babel preset that bundles babel-minify optimisation plugins for production builds. Version 2.0.0 requires Node >=10.13.0 and ships TypeScript types. It includes plugins for constant folding, dead code elimination, guarded expressions, inline consecutive adds, undefined-to-void, and optionally simplify. Unlike full minifiers, it focuses solely on optimisations without mangling or compression, giving finer control over the output. Options allow preserving function/class names and enabling simplify or undefined-to-void transforms. It is best used alongside a separate minification step.

devops

npm install babel-preset-optimizations

github ↗package ↗

INSTALL

IMPORT

SIG · BABEL-PRESET-OPTIM

babel-preset-optimizations

devopsjavascriptv2.0.0

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-optimizations

✓ module.exports = { presets: ['optimizations'] }; or in .babelrc: { "presets": ["optimizations"] }

✗ require('babel-preset-optimizations') as a plugin

It is a preset, not a plugin. Use in presets array with short name 'optimizations'.

options object

✓ {"presets": [["optimizations", { "keepFnName": false }]]}

✗ {"presets": ["optimizations", { "keepFnName": false }]}

Options must be in a nested array: [ ["presetName", options] ].

require() in Node API

✓ const preset = require('babel-preset-optimizations');

✗ const preset = require('babel-preset-optimizations').default;

The package exports the preset function directly; no default export needed.

Shows how to enable the preset with default options in a Babel configuration file.

// .babelrc or babel.config.js module.exports = { presets: [ ['optimizations', { keepFnName: true, keepClassName: true, simplify: false, undefinedToVoid: false }] ] };

Debug

Known issues

gotchaThis preset does not minify or mangle code; it only applies optimisations. Use alongside a minifier like babel-minify or terser.

fix

Add 'minify' or another minification preset/plugin after this one.

affects: >=1.0.0

deprecatedThe simplify option changes code structure significantly and may be considered harmful for debugging.

fix

Only enable simplify in production builds with source maps, or avoid it.

affects: >=1.0.0

gotchaOptions must be passed in the nested array format for presets, not as a flat array.

fix

Use [["optimizations", { options }]] instead of ["optimizations", { options }].

affects: >=1.0.0

breakingVersion 2.0.0 drops support for Node <10.13.0.

fix

Upgrade Node to >=10.13.0 or stick with v1.x.

affects: >=2.0.0

gotchaIn Babel 7, preset short names may not resolve automatically; you might need the full package name.

fix

Use 'babel-preset-optimizations' instead of 'optimizations' if short name fails.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Plugin/Preset files are not allowed to export objects, only functions.

Using an outdated Babel version or wrong import syntax for the preset.

fix

Ensure Babel is version 7 and use the correct preset reference: 'babel-preset-optimizations' or short name 'optimizations'.

Module not found: Can't resolve 'babel-preset-optimizations'

Package not installed or not properly resolved.

fix

Run 'npm install --save-dev babel-preset-optimizations' and check node_modules.

Unknown option: keepFnName

Options object passed incorrectly – not wrapped in an array.

fix

Use [['optimizations', { keepFnName: true }]] instead of ['optimizations', { keepFnName: true }].

Upgrade

Version history

2.0.0latest on npm

Audit

Dependencies

babel-plugin-minify-constant-foldingrequiredcore optimisation plugin for constant folding

babel-plugin-minify-dead-code-eliminationrequiredcore optimisation plugin for dead code elimination

babel-plugin-minify-guarded-expressionsrequiredcore optimisation plugin for guarded expressions

babel-plugin-minify-simplifyoptionaloptional plugin for code simplification

babel-plugin-transform-inline-consecutive-addsrequiredcore optimisation plugin for inlining consecutive additions

babel-plugin-transform-undefined-to-voidoptionaloptional plugin for transforming undefined to void

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/christophehurpeau/babel-preset-optimizations ↗

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