create-react-app: Cannot read property 'ScopeType' of undefined

[Karl Horky]

When using create-react-app with the following setup instructions, the error below occurs:

Instructions:

yarn create react-app my-app

cd my-app

CI=true npx install-peerdeps@latest --yarn --dev @upleveled/eslint-config-upleveled
cp node_modules/@upleveled/eslint-config-upleveled/templates/{*,.eslint*} .
touch .gitignore && grep -Fxq ".eslintcache" .gitignore || echo ".eslintcache" >> .gitignore

yarn upgrade react-scripts

Error:

Failed to compile

Error while loading rule '@typescript-eslint/naming-convention': Cannot read property 'ScopeType' of undefined

Occurred while linting /Users/k/p/my-app/src/index.js

[Karl Horky]

This seems to be caused by the following dependency chain: react-scripts@4.0.3 > eslint-plugin-testing-library@^3.9.2 > @typescript-eslint/experimental-utils@^3.10.1

[Pedro Simão]

I am facing the same issue. What is the solution?

[Karl Horky]

We are addressing it with Yarn Resolutions, by adding a resolution like the following in our package.json:

  "resolutions": {
    "eslint-plugin-testing-library": "4.12.4"
  }

This will force the version 4.12.4 of the package eslint-plugin-testing-library to be installed, regardless of what versions other packages are depending on.

See our change here:

069f62d

This is a workaround and may break things.

There is also a pull request to upgrade this dependency in react-scripts itself: facebook/create-react-app#10817

[Mateusz Szkop]

This error happened to me out of nowhere.
Removing node_modules and installing packages again fixes it.

[brenmoss]

This error happened to me out of nowhere. Removing node_modules and installing packages again fixes it.

This has been causing me issues for a while now... I found a weird solution where saving an unchanged css modules file allowed a watched build to succeed and the error goes away until I edit a ts file... then save an unchanged css module and the watcher builds and so on...

Turns out I too needed to remove the node_modules and install again and the problem is now solved.. thank you for this solution!