[Discussion] Whole form validation about formik HOT 3 CLOSED

Thanks for your kind words. Do you know the keys of field1 and field2 ahead of time? Also can you share the code of what you are trying to do by any chance?

from formik.

I discovered a Yup method Yup.reach() that would allow (in theory) for independent field-level validation. Formik currently validates against the entire schema. This has pros and cons. Validating the entire schema allows you to build forms with interdependent fields and conditional validations with just Yup schemas, validating against a field (on the deltas) may be faster (depending on how fast reach actually is). Regardless, Formik would still validate the whole schema on handleSubmit, so interdependent schemas would still see their day in court. Error messages could get weird though. Hmmm....

Thoughts?

Naive implementation

handleChange = (e: React.ChangeEvent<any>) => {
   e.persist()
   this.setState(state => ({ ... })
   if (validateOnChange) {
      Yup.reach(schema, e.target.name).validate({ ... })
        .then( 
          // ... process errors
        )
   }
}

from formik.

see #61

from formik.