Client side validation with zod: Errors don't get cleared when using 'regex' and 'optional' together

[fabian-michael]

Description
Once you inserted an invalid value into a field with regex and optional in the schema, the error does not get cleared when you empty the field and thus the form is invalid until you insert a valid value.

If applicable, a MRE

https://stackblitz.com/edit/superforms-2-testing-dmk3cn?file=src%2Froutes%2F%2Bpage.svelte

[ciscoheat]

An empty field is the same as an empty string. Use a stringProxy to set it to undefined when empty: https://stackblitz.com/edit/superforms-2-testing-ns3m6n?file=src%2Froutes%2F%2Bpage.svelte

[fabian-michael]

Shouldn't that be the default, when using optional?

[ciscoheat]

There is no way to make it default if you use bind:value, as it will bind to the input field value, which is an empty string when empty.