stage-0 Babel plugin not applying class properties transform

🐛 Bug Report

My class properties have stopped working after updating a small React app to Parcel 1.6.1. I was using babel-preset-stage-0, which worked fine before updating Parcel. Switching to use babel-plugin-transform-class-properties fixes the problem, but the stage-0 preset should include this.

(I also tried the stage-2 preset, but that doesn’t work either. Only specifically installing the transform plugin gets the app to build)

🎛 Configuration

.babelrc

{
  "presets": ["stage-0"]
}

package.json

{
  "name": "parcel-babel-error",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "parcel index.html"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-preset-stage-0": "^6.24.1",
    "parcel-bundler": "^1.6.1"
  },
  "dependencies": {
    "react": "^16.2.0",
    "react-dom": "^16.2.0"
  }
}

CLI command

npm start

🤔 Expected Behavior

Class properties should be transpiled by babel-preset-stage-0 and the app should build

😯 Current Behavior

A build error:

🚨  /Users/oliverjam/Web/parcel-babel-error/index.js:5:4: /Users/oliverjam/  3 | rcel-babel-error/index.js: Missing class properties transform.
  4 | class App extends React.Component {
> 5 |     state = {}
    |     ^
  6 |     render() {
  7 |         return <h1>Hello</h1>
  8 |     }

🔦 Context

I’m trying to use class properties via the stage-0 Babel preset, which should encompass all features in the stages above (class properties are in the stage-2 preset).

💻 Code Sample

Should be fully reproducible here: https://github.com/oliverjam/parcel-babel-error-repro

🌍 Your Environment

Software	Version(s)
Parcel	1.6.1
Node	8.9.4
npm/Yarn	npm 5.6.0
Operating System	macOS 10.13.3

[CesarLanderos]

still happening in 1.9.6

[dackers86]

I’ve had to install manually, new .babelrc is now…

{ “presets”: [“preact-app”], “plugins”: [“transform-class-properties”] }