Registry / fb-babel-plugin-utils

fb-babel-plugin-utils

library0.13.1jsnpmunverified

A collection of shared utility functions used internally by Facebook for building Babel 7 transforms. Version 0.13.1 is the latest stable release, but the package is not intended for public consumption and has no explicit release cadence. It is tightly coupled with Facebook's internal toolchain and the `fbt` (Facebook Translation) ecosystem. Unlike general-purpose Babel utility libraries (e.g., `@babel/helper-plugin-utils`), this package provides internal helpers specific to Facebook's transform infrastructure. It is not recommended for external use.

npm install fb-babel-plugin-utils

github ↗package ↗

INSTALL

IMPORT

SIG · FB-BABEL-PLUGIN-UT

fb-babel-plugin-utils

javascriptv0.13.1

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ import fbBabelPluginUtils from 'fb-babel-plugin-utils'

✗ const fbBabelPluginUtils = require('fb-babel-plugin-utils')

This package is ESM-only; CommonJS require may fail depending on Node/Babel configuration.

someExport

✓ import { someExport } from 'fb-babel-plugin-utils'

✗ const { someExport } = require('fb-babel-plugin-utils')

Named exports may be available, but internal structure is undocumented.

types

✓ import { types } from 'fb-babel-plugin-utils'

✗ import types from 'fb-babel-plugin-utils/types'

Subpath imports are not supported; always import from the main entry.

Shows importing the default export and using a utility to check JSX element type.

import fbBabelPluginUtils from 'fb-babel-plugin-utils'; import { types as t } from '@babel/core'; // Example usage: check if a node is a JSX element const isJsxElement = fbBabelPluginUtils.isJSXElement(t.JSXElement()); console.log(isJsxElement); // true

Debug

Known issues

breakingThis package is intended for internal Facebook use only; breaking changes can occur without notice.

fix

Do not depend on this package for public projects; consider using @babel/helper-plugin-utils instead.

affects: all

deprecatedThe package may use deprecated Babel 7 APIs that could break in future Babel versions.

fix

Monitor Babel compatibility updates; migrate to standard helpers if needed.

affects: >=0.10

gotchaExports are undocumented; relying on any specific export is risky as internals can change.

fix

Pin to a specific version and test thoroughly after upgrades.

affects: all

Errors

Common errors & fixes

Cannot find module 'fb-babel-plugin-utils'

Package not installed or not in node_modules.

fix

Run npm install fb-babel-plugin-utils --save-dev

fbBabelPluginUtils.isJSXElement is not a function

The export does not exist or was incorrectly imported.

fix

Check the available exports by inspecting the package's index.js or TypeScript definitions.

TypeError: t.JSXElement is not a function

Incorrect usage of @babel/types; JSXElement is a node type, not a builder.

fix

Use t.jsxElement(...) or t.jSXElement(...) depending on the version.

Upgrade

Version history

0.13.1latest on npm

Audit

Dependencies

@babel/corerequiredPeer dependency for Babel 7 plugin development

@babel/typesrequiredUsed for AST node creation and manipulation

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/facebook/fbt ↗

packagehttps://www.npmjs.com/package/fb-babel-plugin-utils ↗