EmptyInput
Empty input interface that defines the value a required field of a given type starts at when no initial input is provided. Optional and nullable fields are not affected, as they accept undefined.
Definition
EmptyInputstringstring | undefinednumbernumber | undefinedbooleanboolean | undefineddateDate | undefined
Explanation
Only required fields whose input is undefined fall back to these values. The string property defaults to an empty string so that an untouched field matches the DOM and validates with its own message instead of a type mismatch. The other properties default to undefined.