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TypeScript 4 support
See original GitHub issueDescribe the bug
After updating to typescript@4.0.2 with react-scripts@3.4.1 (I also tried version 3.4.3 where I couldn’t find any release notes) the following eslint error occurred:
Parsing error: Cannot read property 'map' of undefined
This happened only after deleting all of my node_modules and recreating the package-lock.json from scratch.
It seems to be related to @typescript-eslint/eslint-plugin. And I don’t know why but the referenced versions in react-scripts seems to be very old. From react-scripts@3.4.1 package.json:
"@typescript-eslint/eslint-plugin": "^2.10.0",
"@typescript-eslint/parser": "^2.10.0",
Current versions of @typescript-eslint/eslint-plugin and @typescript-eslint/parser are as of now 3.9.1.
- Node: 12.18.3 - ~/.nvm/versions/node/v12.18.3/bin/node
- npm: 6.14.6 - ~/.nvm/versions/node/v12.18.3/bin/npm
Issue Analytics
- State:
- Created 3 years ago
- Reactions:173
- Comments:30 (8 by maintainers)
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This should get fixed in the next release as
react-scriptsin master now requires newer versions: https://github.com/facebook/create-react-app/blob/776373741ad254d66c52991f0639422b195c1d59/packages/react-scripts/package.json#L34-L35Fixed in Create React App 4.0.