Inconsistent isDirty state when resetting a form that's initialized with incomplete defaultValues

[sebakerckhof]

Version Number

7.50.1

Codesandbox/Expo snack

https://codesandbox.io/p/sandbox/relaxed-hill-ss3fl6?file=%2Fsrc%2FApp.tsx

Steps to reproduce

1. Fill in something in the form
2. Click reset button
   -> formState.isDirty stays true

Expected behaviour

formState.isDirty to be false after reset OR formState.isDirty to be true after initializiation.

Note that the form is initialized with a partial defaultValues object (not all fields are part of the default values object). This results in a form state where isDirty is false, as expected.
After modifying a field and calling reset() the isDirty stays true. This only the case if not all fields are part of defaultValues. One could argue that the form state is different from the default values, since the field is not included in the defaultValues, and thus it should stay dirty. I wouldn't argue this since it's not what one would expect IMO. But still, if you go with that argument, then this means the form should already be dirty from the start.

What browsers are you seeing the problem on?

No response

Relevant log output

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[agustaf9]

I ran into the same issue, resetting the the form sets the dirtyFields to an empty object, so to check if the form is actually dirty I need to check the object entries length.

[bluebill1049]

Provide a valid codesandbox: https://codesandbox.io/p/sandbox/relaxed-hill-ss3fl6?file=%2Fsrc%2FApp.tsx

[sebakerckhof]

Should be accessible now: https://codesandbox.io/p/sandbox/relaxed-hill-ss3fl6?file=%2Fsrc%2FApp.tsx

[bluebill1049]

missing lastName: "", for defaultValues