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babel-preset-env-modules

library1.0.1jsnpmunverified

A Babel preset that wraps @babel/preset-env and babel-polyfill-corejs3 to produce minimal compiled output for environments that support ESM, with improved polyfill handling. Current version 1.0.1, released as a single stable version. It solves the common issue where preset-env conflates helpers and polyfills, leading to unnecessary code. Key differentiators: automatically prevents inclusion of supported builtins, uses finer-grained polyfills via babel-polyfills, excludes niche polyfills (e.g., Symbol.species) by default, and coordinates options between preset-env and polyfill plugin to avoid conflicts. Suitable for library authors targeting modern browsers or Node.js with ESM.

devops

npm install babel-preset-env-modules

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INSTALL

IMPORT

SIG · BABEL-PRESET-ENV-M

babel-preset-env-modules

devopsjavascriptv1.0.1

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.

babel-preset-env-modules

✓ module.exports = { presets: [['babel-preset-env-modules', options]] }

✗ import preset from 'babel-preset-env-modules'

This is a Babel preset, used in .babelrc or babel.config.js, not imported in application code.

DEFAULT

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

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

Presets are strings in Babel config, not require() calls.

Configure Babel with babel-preset-env-modules for ESM targets with polyfill support.

// babel.config.js module.exports = { presets: [ [ 'babel-preset-env-modules', { targets: { esmodules: true }, loose: true, bugfixes: true, modules: false, // preserve ESM polyfill: { // see babel-polyfill-corejs3 options corejs: 3, proposals: true, }, }, ], ], };

Debug

Known issues

gotchaThe polyfill option automatically sets corejs and useBuiltIns, overriding any manual settings passed to preset-env.

fix

Use polyfill option instead of manually setting corejs/useBuiltIns in preset-env options.

affects: >=1.0.0

deprecatedThe package is essentially a wrapper that may become obsolete as @babel/preset-env and babel-polyfills improve.

fix

Consider migrating to direct use of @babel/preset-env with useBuiltIns: 'usage' and corejs option.

affects: >=1.0.0

gotchaSetting modules to false (preserve ESM) may conflict with polyfill plugin if not careful; polyfill may still inject non-ESM code.

fix

Ensure polyfill option is configured to respect modules setting.

affects: >=1.0.0

Errors

Common errors & fixes

Error: [BABEL] unknown preset 'babel-preset-env-modules'

Preset not installed

fix

npm install babel-preset-env-modules --save-dev

TypeError: Cannot read property 'preset-env' of undefined

Missing @babel/preset-env peer dependency

fix

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

Upgrade

Version history

1.0.1latest on npm

Audit

Dependencies

@babel/preset-envrequiredcore preset for compiling JS

babel-polyfill-corejs3requiredpolyfill plugin used for finer grained core-js polyfills

Agent activity

2 hits · last 30 days

node

Resources

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