Learn how to handle forms in a Next.js modal window using React-Hook-Form for validation, ShadCN/ui Dialog for UI components, and server actions for server-side validation. The post covers setting up a Next.js project, using parallel and intercepting routes to create modals, integrating form validation with Zod and React-Hook-Form, and handling user data with custom components and Json server. Practical examples demonstrate updating UI without errors and implementing user feedback mechanisms.
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