Compatibility with React 17 / react-scripts 4.0.0

[kenbankspeng]

Does anyone have any insight into potential support for react-scripts 4.0.0 ? Thank you.

I hit a react-app-rewired error when trying to use customize-cra @ 1.0.0 / react-app-rewired @ 2.16 with React 17 / react-scripts@4.0.0

The error does not occur with React 16 and react-scripts 3.

Cannot read property 'use' of undefined
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! start: react-app-rewired start
npm ERR! Exit status 1

[jeggy]

This happens because of CRA switched to eslint-webpack-plugin.

But reading through the release notes, they say this:

as it is no longer required to customize the ESLint config.

So to fix this, you just need to remove the useEslintRc from your config-overrides.js. It should still be using your eslintrc file 😃

[kenbankspeng]

Thank you @jeggy. I removed useEslintRc and the error went away. Maybe some documentation could be added to highlight useEslintRc is not to be used with react-scripts 4.

[trsp400]

This happens because of CRA switched to eslint-webpack-plugin.

But reading through the release notes, they say this:

as it is no longer required to customize the ESLint config.

So to fix this, you just need to remove the useEslintRc from your config-overrides.js. It should still be using your eslintrc file smiley

Thank you! It works for me