"isLoading" form state for async default values

[psteinroe]

Is your feature request related to a problem? Please describe.
I have been playing around with the new async default values discussed in #9046 and really love the dx. However, there is one thing missing for me: A formState to know whether the default values have been initialised, e.g. isLoading or isInitialised.

Describe the solution you'd like
Add a value to formState that indicates whether the default values have been loaded.

Describe alternatives you've considered

• Watching a value in the form
• Set an external state from within the defaultValues callback

Additional context
Thanks for all the great work! I hope this is the right place for this request.

[bluebill1049]

yea, we can consider adding that for sure. I will put this into the backlog for now and move it to the RFC column. 👍

const { formState: { isLoading } } = useForm()

I think isLoading is pretty good and libraries such as SWR, use that term as well. Probably cut this in next year's release.