React injecting iframe with max z-index on reload after changes (development)

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This is actually a known bug in react-scripts, which is used in create-react-app.

They’re apparently working on a fix for react-scripts v5.0.1, but adding the following lines to your package.json will fix it:

"resolutions": {
  "react-error-overlay": "6.0.9"
}

So your package.json should look something like this:

{
  "name": "whatever",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    ...
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "resolutions": {
    "react-error-overlay": "6.0.9"
  },
  ...
}

Make sure to delete your node_modules and package-lock.json or yarn.lock, and reinstall your packages.

Here’s a link to the open issue: https://github.com/facebook/create-react-app/issues/11773 (also 11771, but it appears to be closed).

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