Make sure to always include a trailing comma when defining a single type parameter T. Here's an example: `<T,>`

Ensure that a single type parameter T includes a trailing comma. For example: <T,>. (3:29)

export const toggleItem = <T>(

How can I resolve this error? Adding <T,> causes Prettier to remove the "," when saving. I have not made any changes to the package.json, and I have already deleted node_modules and package-lock.json file. Any guidance on how to fix this would be appreciated.

Node v16.14.1 NPM 8.5.4

"@babel/core": "7.14.3",
"@babel/plugin-proposal-class-properties": "7.13.0",
"@babel/preset-env": "7.14.4",
"@babel/preset-react": "7.13.13",
"@babel/preset-typescript": "7.13.0",
"@emotion/babel-preset-css-prop": "11.2.0",
"@emotion/eslint-plugin": "11.2.0",
"@types/hammerjs": "2.0.39",
...
typescriptnpmeslint

Answer №1

Special thanks to T.J.Crowder for the assistance! I made the decision to alter the file extension to .jsx and adjusted the function to utilize "ANY" instead of "T".

Answer №2

Encountering a similar issue here and it appears that this might not necessarily need to be a tsx file since it lacks JSX...

Update: I came across the pertinent problem on github: https://github.com/babel/babel/issues/14361

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