Registry / serialization / babel-polyfill

babel-polyfill

library6.26.0jsnpmunverified

Provides core-js and regenerator-runtime polyfills necessary for a full ES2015+ environment in browsers and Node.js. Version 6.26.0 is the last stable release of this package. Note: babel-polyfill is deprecated in favor of direct use of core-js and regenerator-runtime, or using @babel/preset-env with useBuiltIns. The package was removed in Babel 7.4.0 and has no further releases. This entry applies to v6.26.0.

serialization

npm install babel-polyfill

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · BABEL-POLYFILL

babel-polyfill

serializationjavascriptv6.26.0

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

✓ import 'babel-polyfill'

✗ import babelPolyfill from 'babel-polyfill'

Importing the module has no default export. Just import for side effects.

require

✓ require('babel-polyfill')

✗ const babelPolyfill = require('babel-polyfill')

Assigning the result to a variable is unnecessary and misleading.

useBuiltIns

✓ // Use @babel/preset-env with useBuiltIns instead

✗ import 'babel-polyfill'

Deprecated in favor of direct core-js/regenerator imports or @babel/preset-env. See warnings.

Shows how to import babel-polyfill to enable ES2015+ features like Map, Set, Promise, Symbol, Array.from, Object.assign, and async/await.

// Install: npm install babel-polyfill // Import at entry point (before any other code) import 'babel-polyfill'; // Now you can use ES2015+ features const map = new Map(); const set = new Set(); const promise = Promise.resolve('foo'); const symbol = Symbol('bar'); // Array.from, Object.assign, etc. are available const arr = Array.from('hello'); const merged = Object.assign({}, { a: 1 }, { b: 2 }); // Async/await works if regenerator-runtime is included async function test() { return await Promise.resolve('done'); }

Debug

Known issues

deprecatedbabel-polyfill is deprecated. Use core-js/stable and regenerator-runtime/runtime directly, or use @babel/preset-env with useBuiltIns.

fix

Replace import 'babel-polyfill' with import 'core-js/stable'; import 'regenerator-runtime/runtime'; or configure @babel/preset-env.

affects: >=6.26.0

breakingBabel 7.4.0 removed babel-polyfill. The package will return an empty module or error.

fix

Do not use babel-polyfill with Babel >=7.4.0. Use direct polyfill imports.

affects: >=7.4.0

gotchaImporting babel-polyfill multiple times may cause duplicate polyfills and increased bundle size.

fix

Ensure babel-polyfill is imported only once in your entry point.

affects: *

breakingbabel-polyfill includes core-js v2, which does not support certain proposals like globalThis, flatMap, etc.

fix

Use core-js v3 directly via `import 'core-js/stable'` for full ES2019+ support.

affects: 6.x

gotchababel-polyfill pollutes the global scope. Use `@babel/plugin-transform-runtime` and `@babel/runtime` for non-global polyfills.

fix

Switch to @babel/plugin-transform-runtime with corejs option for scoped polyfills.

affects: *

Errors

Common errors & fixes

Module not found: Can't resolve 'babel-polyfill'

babel-polyfill was removed in Babel 7.4.0. The package no longer exists in newer versions.

fix

Install core-js and regenerator-runtime, then use import 'core-js/stable'; import 'regenerator-runtime/runtime';

Cannot find module 'regenerator-runtime' or 'core-js'

babel-polyfill depends on core-js and regenerator-runtime. If they are not installed, import fails.

fix

Run npm install babel-polyfill (which installs these as dependencies) or install them separately.

Uncaught ReferenceError: regeneratorRuntime is not defined

babel-polyfill includes regenerator-runtime, but if not imported or if using older version, regeneratorRuntime may be missing for async/await.

fix

Ensure import 'babel-polyfill' is at the top of your entry file, or import regenerator-runtime directly.

Duplicate polyfills detected

Both babel-polyfill and core-js/stable are imported, resulting in duplicate polyfills.

fix

Use only one polyfill source. Prefer core-js/stable over babel-polyfill.

Upgrade

Version history

6.26.0latest on npm

Audit

Dependencies

core-jsrequiredProvides ES5+ polyfills for built-in objects, promises, symbols, etc.

regenerator-runtimerequiredProvides runtime for async/await and generator functions.

Agent activity

14 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/babel/babel ↗

packagehttps://www.npmjs.com/package/babel-polyfill ↗

homepagehttps://babeljs.io/ ↗