shadcn-syntax-form

shadcn ui form validation fails silently when the seven Form primitives are incorrectly composed, breaking aria ID wiring and zod error rendering. Correctly wiring FormField, FormItem, and FormMessage ensures zodResolver validation errors reach the UI reliably.

Wire Radix controlled components in shadcn ui by using the Controller component from react-hook-form instead of register. Bind Radix props directly using value/onValueChange for Select and checked/onCheckedChange for Checkbox to ensure values reach the submit handler.

Set up a schema-first useForm by defining a stable module-scope zod schema, passing it to zodResolver, and deriving TypeScript types from it. Always provide defined defaultValues to prevent uncontrolled-to-controlled input warnings in shadcn ui forms.

Yes, you need to add the "use client" directive to establish RSC-safe boundaries for shadcn ui forms. react-hook-form state and Radix controlled components require client-side execution, so the Form component tree must be marked as a client component.

Handle async refine safely in zod by ensuring the FormMessage component renders the resolved validation errors. The react-hook-form handleSubmit function must be passed as the native form onSubmit handler to trigger both sync and async zod validation correctly.

React warns about uncontrolled-to-controlled inputs when defaultValues are undefined in the useForm setup for shadcn ui forms. Providing explicitly defined defaultValues for every field in the zod schema prevents this state mismatch during Radix component binding.