How do you validate initial default values?

[thomaschaaf]

Is the correct way to validate the defaultValues at the start using a useEffect using trigger like this? Or is there another way to trigger the validation of the defaultValues?

https://codesandbox.io/s/react-hook-form-basic-validation-mtbz6?file=/src/index.js:385-476

[bluebill1049]

that's correct, or you can set mode to onChange and reading isValid formState

[jenyckee]

This doesn't provide you with the errors though

[bezenson]

For me formState.isValid works without anything else. I hope it's expected :)