Registry / serialization / babel-preset-es2015-loose

babel-preset-es2015-loose

library8.0.0jsnpmunverified

Babel preset that enables loose mode for all es2015 plugins. Latest version 8.0.0, deprecated since Babel v6.13+ because the official babel-preset-es2015 now natively supports loose mode via configuration. This preset works by modifying babel-preset-es2015 using modify-babel-preset. It requires installing both babel-preset-es2015-loose and babel-preset-es2015. No longer recommended for Babel v6.13+; directly use ["es2015", {"loose": true}] instead.

serialization

npm install babel-preset-es2015-loose

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · BABEL-PRESET-ES201

babel-preset-es2015-loose

serializationjavascriptv8.0.0

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.

default

✓ Require via babel preset configuration (".babelrc" or programmatic)

✗ Direct import in code: import preset from 'babel-preset-es2015-loose' is not intended

This is a Babel preset, not a JavaScript module meant for direct import. Use it in Babel configuration under the 'presets' array.

Install, configure in .babelrc, and run a transpilation example using the loose preset. (250+ chars)

// Install both packages npm install --save-dev babel-preset-es2015-loose babel-preset-es2015 // .babelrc { "presets": ["es2015-loose"] } // Example input (test.js) const x = [1, 2, 3]; const y = [...x, 4]; console.log(y); // Transpile with Babel CLI babel test.js --presets es2015-loose // Or programmatically const babel = require('babel-core'); const result = babel.transform('const x = [1, 2, 3]; const y = [...x, 4];', { presets: ['es2015-loose'] }); console.log(result.code);

Debug

Known issues

deprecatedThis preset is deprecated for Babel v6.13+. Use official babel-preset-es2015 with loose option.

fix

Replace 'es2015-loose' with ["es2015", {"loose": true}] in your Babel config and uninstall babel-preset-es2015-loose.

affects: >=7.0.0

breakingBreaking change from v6 to v7: requires explicit installation of babel-preset-es2015 due to modify-babel-preset.

fix

Ensure babel-preset-es2015 is listed as a dependency in package.json and installed.

affects: >=7.0.0

gotchaLoose mode may deviate from spec; cross-browser compatibility may be affected.

fix

Test thoroughly in target environments, or avoid loose mode for spec compliance.

affects: all

gotchaThe preset version is tied to modify-babel-preset, not babel core; updates may lag.

fix

Consider using official babel-preset-es2015 directly with loose option if on Babel v6.13+.

affects: all

Errors

Common errors & fixes

Cannot find module 'babel-preset-es2015'

Missing peer dependency babel-preset-es2015 was not installed.

fix

Run: npm install --save-dev babel-preset-es2015

Unknown preset "es2015-loose" is not a valid preset or plugin

Preset not installed or Babel cannot locate it.

fix

Verify babel-preset-es2015-loose is in node_modules and listed in package.json devDependencies.

Error: Preset es2015-loose requires babel-preset-es2015 (>=6.0.0) to be installed

babel-preset-es2015 version does not satisfy the peer dependency range.

fix

Update babel-preset-es2015 to version 6.0.0 or higher.

Upgrade

Version history

8.0.0latest on npm

Audit

Dependencies

babel-preset-es2015requiredThis preset modifies babel-preset-es2015; it must be installed as a peer dependency.

Agent activity

16 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/bkonkle/babel-preset-es2015-loose ↗

packagehttps://www.npmjs.com/package/babel-preset-es2015-loose ↗

homepagehttps://babeljs.io/ ↗