Registry / serialization / babel-helpers

babel-helpers

library6.24.1jsnpmunverified

A collection of helper functions used by Babel transforms, such as `typeof`, `extends`, `inherits`, and others. Current stable version is v7.x (e.g., v7.29.2), with v8.0.0-rc.3 as the next major pre-release. The package is part of the Babel monorepo and is released on the same cadence as Babel core (typically monthly or as needed). Key differentiator: it provides the internal helper functions that Babel plugins use to generate runtime code, and it is not intended for direct use by most developers; instead, the helpers are bundled into output via `@babel/plugin-transform-runtime` or `@babel/preset-env`.

serialization

npm install babel-helpers

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · BABEL-HELPERS

babel-helpers

serializationjavascriptv6.24.1

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.

get

✓ import { get } from 'babel-helpers'

✗ import helpers from 'babel-helpers'

Default export is not available. Use named import for the 'get' function.

list

✓ import { list } from 'babel-helpers'

✗ const list = require('babel-helpers').list

Note that list() returns an array of all helper names. In CJS, require is fine.

all

✓ import * as helpers from 'babel-helpers'

✗ const helpers = require('babel-helpers')

In ESM, use namespace import to access both 'get' and 'list' as properties.

Demonstrates importing and using the 'get' function to retrieve a helper by name, and checking its AST type with babel-types.

import { get } from 'babel-helpers'; import * as t from 'babel-types'; const typeofHelper = get('typeof'); console.log(t.isExpressionStatement(typeofHelper)); // true

Debug

Known issues

breakingbabel-helpers v6 and v7 have breaking changes in helper APIs. Direct use of helpers package is discouraged; use @babel/plugin-transform-runtime or @babel/preset-env instead.

fix

Update to latest v7.x or v8.x and prefer using plugins that handle helpers automatically.

affects: >=6.0.0

deprecatedSome helpers may be deprecated in future versions. Always check the changelog for deprecations.

fix

Stay updated with Babel releases and use the specific plugin that provides the helper.

affects: >=7.0.0

gotchaImporting from 'babel-helpers' does not work in browser environments without a bundler. The package is designed for Node.js and requires transformation.

fix

Use a bundler like webpack or rollup with babel-loader to include helpers.

affects: *

gotchaThe 'get' function expects a string name and returns an AST node. If the name is invalid, it may throw or return undefined.

fix

Validate helper names using the 'list' function or refer to the Babel source code.

affects: *

Errors

Common errors & fixes

Cannot find module 'babel-helpers'

Package is not installed or not in node_modules.

fix

Run npm install --save-dev babel-helpers

TypeError: helpers.get is not a function

Importing the default export instead of the named export.

fix

Use import { get } from 'babel-helpers' instead of import helpers from 'babel-helpers'

Error: Unknown helper: myHelper

Requested helper name does not exist.

fix

Use helpers.list() to get all available helper names.

Upgrade

Version history

6.24.1latest on npm

Audit

Dependencies

babel-typesoptionalUsed in examples and internally for AST node creation

Agent activity

17 hits · last 30 days

node

OpenAI (training)

Resources

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

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

homepagehttps://babeljs.io/ ↗