buildo Babel Preset

0.1.1 verified Sat Apr 25 auth: no javascript

A Babel preset that groups plugins and presets commonly used at buildo, including support for React and Node environments. Version 0.1.1 appears to be stable with no active development. It wraps babel-preset-env and conditionally includes React plugins based on the 'env' option. Compared to other presets like babel-preset-react-app, it is minimal and organization-specific, not recommended for general use.

Common errors

error Error: Cannot find module 'babel-preset-env' ↓

cause Missing peer dependency babel-preset-env.

fix

npm install --save-dev babel-preset-env

error Error: Plugin/Preset files are not allowed to export objects, only functions. ↓

cause Using Babel 7+ which expects module formats that export functions, but babel-preset-buildo may export an object.

fix

Use Babel 6 or migrate to @babel/preset-env.

error ReferenceError: regeneratorRuntime is not defined ↓

cause Using async/generator functions without including babel-polyfill or @babel/polyfill.

fix

Add 'useBuiltIns': 'usage' option or import '@babel/polyfill'.

Warnings

deprecated Depends on babel-preset-env which has been superseded by @babel/preset-env since Babel 7. ↓

fix Use @babel/preset-env directly or migrate to Babel 7+.

gotcha The package does not specify exact peer dependencies in older versions; install may fail without manually installing babel-preset-env. ↓

fix Ensure babel-preset-env is installed: npm install --save-dev babel-preset-env

gotcha The env option is case-sensitive; 'react' and 'node' are the only supported values. Unknown values may silently default to 'node'. ↓

fix Use exactly 'react' or 'node' for the env option.

deprecated The transform-class-properties and transform-object-rest-spread plugins are included by default but are now part of @babel/preset-env's shipped proposals. ↓

fix Use @babel/preset-env with appropriate corejs version instead.

Install

npm install babel-preset-buildo

yarn add babel-preset-buildo

pnpm add babel-preset-buildo

Imports

default

wrong

require('babel-preset-buildo') in babel.config.js

correct

In .babelrc: { "presets": ["buildo"] }

Used as a Babel preset in configuration files, not imported in code.

with options

wrong

{ "presets": ["buildo", { "env": "react" }] }

correct

{ "presets": [["buildo", { "env": "react" }]] }

Options are passed as an array with preset name first, then options object.

environment detection

wrong

Setting env option in preset options while also using BABEL_ENV/react-preset separately

correct

Set BABEL_ENV or NODE_ENV to 'react' to automatically use react preset

The preset's env option overrides automatic detection from BABEL_ENV.

Quickstart

Basic setup of babel-preset-buildo with React env and custom browser targets.

// Install
npm install --save-dev babel-preset-buildo

// .babelrc
{
  "presets": [
    ["buildo", {
      "env": "react",
      "targets": {
        "chrome": 52,
        "node": 4
      }
    }]
  ]
}

// Run Babel
npx babel src --out-dir lib