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Learn React 19: The Complete Guide to Modern Web Apps

Solution: Dynamic Registration Form with Optimistic Feedback

Explore how to create a dynamic registration form using React 19 hooks such as useFormStatus, useActionState, and useOptimistic. Learn to manage form state, provide immediate optimistic feedback during async actions, and handle validation with controlled inputs for a responsive and user-friendly registration experience.

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Below is the complete implementation of the dynamic registration form using useFormStatus, useActionState, and useOptimistic to deliver instant, reliable, and user-friendly feedback.

Solution

Here’s the implementation for the dynamic registration form with optimistic feedback using React 19 hooks:

Code explanation

In RegistrationForm.js:

  • Lines 7–26: registerAction is the async action (React 19 pattern). It performs server-like validation for name, email, and password, then returns either { error: ... } or { success: ... } after a simulated delay.

  • ...