Incompatible TypeScript version in package.json

[rafgraph]

The minimum TS version listed in package.json when creating a new CRA project is 4.0.3, which not compatible with the new JSX transform and the included tsconfig.json setting "jsx": "react-jsx"

This is ultimately the root cause behind #10144 because when package.json lists a compatible TS version, VS Code knows not to use an incompatible version.

Solution: change the TS version in newly created CRA projects to "typescript": "^4.1.2"

[lfoliveir4]

@rafgraph This is solved to me. I started a project and found the same problem as you. I just upgraded the typescript as mentioned and it worked 100% for me, clearing all compilation errors and the new jsx-transform is also working.

Thanks!!!!

[Poolshark]

Unfortunately this did not solve it for me. Anything else I could try?

[rafgraph]

@Poolshark see #10144 (comment)

You might need to manually select the workspace version of TS

[Poolshark]

Sorry for the supposedly stupid question but how do I do that?

[rafgraph]

It’s explained in #10144 (comment)

[rafgraph]

Fixed in CRA v4.0.2