Dirty handling workflow

Trying to implement a workflow as follows:

Users sees a pristine form, save button is hidden => user begins typing in input, form becomes dirty, save button is shown => user saves, form becomes pristine, save button is hidden

Is this currently possible in formik? dirty is remaining as false for me up until the form submitted and is never reset afterwards

[insidewhy]

Was really surprised to learn that dirty means “different to initial values” rather than “different to submitted values” as in every other form library I’ve used. I tried to resetValues to the submitted values, and that cleared every single input in my form. Argh.

[jaredpalmer]

validateOnChange and validateOnBlur are true by default in 0.9.2, but I don’t think I considered how it might impact the the meaning of dirty. I want to have a larger conversation about pristine / dirty, but this PR would allow you to check the equality of initialValues with current values, while not making a breaking change.

// if values is flat
{props.values !== props.initialValues &&
  <button type="submit">Save</button>
}

// otherwise
{!isEqual(props.values, props.initialValues) &&
  <button type="submit">Save</button>
}