preact/compat doesn't reload browser on file change on Parcel 2

🐛 bug report

When I tried to run a dev server on parcel@next I didn’t see the browser updating on file changes (which is out-of-the-box behaviour of Parcel v1)

Parcel v1 works absolutely fine and reload happens

🎛 Configuration (.babelrc, package.json, cli command)

parcel index.html -p 3000

or

parcel serve index.html -p 3000

🤔 Expected Behavior

Dev server would reload my page

😯 Current Behavior

Currently the browser doesn’t reload but WebSocket is being sent (I see console clear message flickering when I update file)

💁 Possible Solution

Write custom config maybe? I’m not sure which one but I expect this to be working out of the box

🔦 Context

This issue affected me after starting a dev server on Parcel 2.

I’m writing an app with Preact, Emotion and Rebass.

💻 Code Sample

Put this into package.json:

"alias": {
    "react": "preact/compat",
    "react-dom": "preact/compat"
  }

Then write this:

import React from 'react'
import { render } from 'react-dom'

render(<h1>Hello World</h1>, document.getElementById('app')

And try to change component’s contents. Nothing will change.

🌍 Your Environment

Software	Version(s)
Parcel	2.0.0-alpha.3.2
Node	13.2
npm/Yarn	1.19.2
Operating System	Linux 5.14

[willybrauner]

@talentlessguy HMR works with your configuration? I got the same issue with these packages:

  "dependencies": {
    "preact": "^10.5.15",
    "react": "^17.0.2",
    "react-dom": "^17.0.2"
  },
  "devDependencies": {
    "@parcel/reporter-bundle-analyzer": "^2.0.0",
    "@parcel/transformer-inline-string": "^2.0.0",
    "@parcel/transformer-less": "^2.0.0",
    "parcel": "^2.0.0",
    "typescript": "^4.4.4"
  },
  "alias": {
    "react": "preact/compat",
    "react-dom": "preact/compat"
  }

[talentlessguy]

@mischnic because now it works (I guess someone made a fix in preact or parcel), closing the issue