Registry / babel-preset-es2015-loose-rollup

babel-preset-es2015-loose-rollup

library7.0.0jsnpmunverified

Babel preset that combines es2015-loose and es2015-rollup presets for tree-shaking with Rollup. Note that version numbering is independent of Babel versions. This package is deprecated in favor of @babel/preset-env. Last release v7.0.0, no active maintenance. Not compatible with Babel 7.x (only Babel 6.x). Do not use for new projects.

npm install babel-preset-es2015-loose-rollup

github ↗package ↗

INSTALL

IMPORT

SIG · BABEL-PRESET-ES201

babel-preset-es2015-loose-rollup

javascriptv7.0.0

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

✓ // In .babelrc: "presets": ["es2015-loose-rollup"]

✗ // Using require in code: const preset = require('babel-preset-es2015-loose-rollup')

Presets are configured via .babelrc or programmatic API, not directly imported as module.

name

✓ // Correct preset name string: 'es2015-loose-rollup'

✗ // Wrong: 'es2015-loose-rollup' misspelled or using old 'es2015' prefix

Preset name must match exactly. Babel 6 only; for Babel 7 use @babel/preset-env with options.

config

✓ require('babel-core').transform(code, { presets: ['es2015-loose-rollup'] })

✗ // Common mistake: passing object instead of string: require('babel-core').transform(code, { presets: [require('babel-preset-es2015-loose-rollup')] })

Preset names are strings, not required modules, in Babel 6 API.

Shows how to configure the preset in .babelrc for Babel 6 with Rollup.

{ "presets": ["es2015-loose-rollup"] }

Debug

Known issues

deprecatedThis package is deprecated in favor of @babel/preset-env with "modules": false for Rollup tree-shaking.

fix

Replace with @babel/preset-env and set modules to false.

affects: *

breakingVersion 7.0.0 does not correspond to Babel 7; it is still for Babel 6 and will not work with Babel 7.

fix

Use @babel/preset-env for Babel 7 projects.

affects: 7.0.0

gotchaLoose mode may produce code that is not spec-compliant, potentially breaking edge cases.

fix

Avoid loose mode unless you fully understand the implications and test thoroughly.

affects: *

gotchaThe preset is specifically for use with Rollup; using with other bundlers may not yield tree-shaking benefits.

fix

Use @babel/preset-env with appropriate module format for other bundlers.

affects: *

Errors

Common errors & fixes

Error: Cannot find module 'babel-preset-es2015-loose-rollup'

Preset name typo or not installed locally or globally.

fix

npm install --save-dev babel-preset-es2015-loose-rollup and ensure .babelrc uses exact string.

Error: Plugin/Cannot find preset 'es2015-loose-rollup' relative to directory ...

Preset not in node_modules or misconfigured path.

fix

Install the preset locally and check that .babelrc is in the correct root directory.

Requiring the preset directly in code throws 'Preset must be a string' or similar.

Passing the required module instead of the preset name string in Babel API.

fix

Use presets: ['es2015-loose-rollup'] not presets: [require('babel-preset-es2015-loose-rollup')].

Babel 7: Error: [BABEL] unknown preset: es2015-loose-rollup (While processing preset: ...)

Using Babel 7 + babel-preset-es2015-loose-rollup which is incompatible.

fix

Upgrade to @babel/preset-env.

Upgrade

Version history

7.0.0latest on npm

Audit

Dependencies

babel-preset-es2015-looserequiredProvides loose mode transformations for ES2015

babel-preset-es2015-rolluprequiredOptimizes ES2015 modules for Rollup tree-shaking

Agent activity

5 hits · last 30 days

node

Resources

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

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