Version 4.5.0 WebpackError: ReferenceError: window is not defined during SSR

[ThewBear]

Describe the bug
Using with gatsby will cause ReferenceError: window is not defined during build time.

To Reproduce
Use useForm hook in gatsby pages.

Here is where the error happens.

react-hook-form/src/useForm.ts

Line 92 in 61d019f

const isWindowUndefined = isUndefined(window);

[bluebill1049]

thanks will patch that issue. thanks

[bluebill1049]

can you try this beta? react-hook-form@4.5.1-beta.2

[senol-keskin]

can you try this beta? react-hook-form@4.5.1-beta.2

it works for me, thanks!