setValue()'s first parameter is always of type 'never' in Typescript

Describe the bug I try to use react-hook-form in Typescript. The IDE (IntelliJ in my case but also the Typescript compiler) complains that

Argument of type "..." is not assignable to parameter of type never

To Reproduce

Here’s a simple codesandbox project. Open it in the Editor, wait a bit and you will see that in line index.tsx:8 “someField” will be marked red and mouse over will show

Argument of type "someField" is not assignable to parameter of type never

https://codesandbox.io/embed/react-typescript-vf3xc

The same thing happens in IntelliJ as well.

If you mouse over on useForm in index.tsx:6 the second type argument there will also be ‘never’.

[stramel]

@beepsoft Your codesandbox is giving errors about crossorigin errors. However, if you pass the generic to useForm it should not give you any errors. In your case, useForm<{ someField: string }>() should get rid of the error. It shouldn’t require the generic so I can look into that if you can provide a codesandbox that doesn’t trigger cors errors.

[stramel]

@bluebill1049 Yeah, we shouldn’t require passing a generic. I think if I improve the typing to where the key extends string it should be fine. Will look into it.