read-babelrc-up

1.1.0 verified Sat Apr 25 auth: no javascript maintenance

Utility to find and parse the closest Babel configuration file (`.babelrc`, `.babelrc.js`, `babel.config.js`, or `babel` in `package.json`) by walking up directories. Version 1.1.0 is the latest stable release, with sporadic updates and no active development cadence. It supports both async and sync APIs, returns the parsed config and file path. Compared to similar tools like `find-up` combined with `cosmiconfig`, this package provides a simpler, focused API for Babel config lookup. Requires Node >=10.

Common errors

error Cannot find module 'read-babelrc-up' ↓

cause Package not installed or not in node_modules

fix

Run npm install read-babelrc-up or check your module path.

error ERR_REQUIRE_ESM ↓

cause Using ES module import syntax on a CommonJS-only package

fix

Use require() instead of import, or use dynamic import() with .mjs extension.

error TypeError: readBabelrcUp.sync is not a function ↓

cause Trying to destructure sync as a named export

fix

Use const sync = require('read-babelrc-up').sync; or call readBabelrcUp.sync() directly.

Warnings

deprecated This package is no longer actively maintained; Babel configuration loading is better handled by Babel's own tools or cosmiconfig. ↓

fix Consider using @babel/core's loadPartialConfig or cosmiconfig instead.

gotcha Does not support .babelrc.json, .babelrc.yaml, or other modern Babel config formats. Only .babelrc, .babelrc.js, babel.config.js, and 'babel' key in package.json. ↓

fix Use a more comprehensive config loader like cosmiconfig with babel preset.

breaking Dropped Node.js v6 support in version 0.4.0. ↓

fix Ensure Node.js >=10 is used (current engine requirement).

Install

npm install read-babelrc-up

yarn add read-babelrc-up

pnpm add read-babelrc-up

Imports

readBabelrcUp
wrong
```
import readBabelrcUp from 'read-babelrc-up'
```
correct
```
const readBabelrcUp = require('read-babelrc-up')
```
This package is CommonJS only; ESM import will fail. Use dynamic import() if needed.

readBabelrcUp.sync

wrong

const { sync } = require('read-babelrc-up')

correct

const result = readBabelrcUp.sync({ cwd: '/path' })

sync is a method on the default export, not a separate named export.

Quickstart

Demonstrates both async and sync APIs for finding and parsing the closest Babel config.

const readBabelrcUp = require('read-babelrc-up');

// Async usage
readBabelrcUp({ cwd: process.cwd() })
  .then(result => {
    console.log(result);
    // { babel: { presets: [...] }, path: '/path/to/.babelrc' }
  })
  .catch(err => console.error(err));

// Sync usage
const result = readBabelrcUp.sync();
console.log(result);
// { babel: { presets: ['es2015', 'react'] }, path: '/Users/akameco/src/my-babel-app/.babelrc' }