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January 17, 20266 min readAI Video-to-Code for

AI Video-to-Code for Generating React Hook Forms

R
Replay Team
Developer Advocates

TL;DR: Stop wrestling with React Hook Forms and repetitive UI tasks; use AI video-to-code powered by Replay to automatically generate fully functional forms directly from screen recordings of your desired user interactions.

The future of UI development isn't about painstakingly crafting every form field and validation rule by hand. It's about capturing user behavior and letting AI generate the code for you. Screenshot-to-code tools are a dead end. They only understand the visual representation of a UI, not the behavior behind it. We need a paradigm shift: Behavior-Driven Reconstruction.

Enter AI Video-to-Code.

The Problem with Traditional React Hook Forms#

React Hook Form is a powerful library, but building complex forms still requires significant effort. You have to:

  • Define your schema.
  • Register each input field.
  • Implement validation logic.
  • Handle form submission.
  • Manage errors.

This process is time-consuming, repetitive, and prone to errors. Imagine building a multi-page form with conditional logic and custom validation rules. The complexity explodes.

Introducing Behavior-Driven Reconstruction with Replay#

Replay is a revolutionary video-to-code engine that uses Gemini to reconstruct working UI directly from screen recordings. Unlike screenshot-to-code tools, Replay understands what users are trying to do, not just what they see. This "Behavior-Driven Reconstruction" approach allows Replay to generate more accurate, functional, and maintainable code.

Replay analyzes the video, identifies user interactions (typing, clicking, scrolling), and infers the underlying logic. This allows it to automatically generate the necessary React Hook Form code, including:

  • Form schema definition.
  • Input field registration.
  • Validation rules based on user input.
  • Form submission handler.
  • Error handling.

Why Video-to-Code is Superior#

FeatureScreenshot-to-CodeVideo-to-Code (Replay)
InputStatic ImagesDynamic Video
Behavior Analysis
Understanding of User Intent
Multi-Page SupportLimited
Code AccuracyLowerHigher
Functional CodeOften Requires Manual InterventionMore Likely to be Functional Out-of-the-Box
Supabase IntegrationManualAutomatic

💡 Pro Tip: When recording your video for Replay, narrate your actions. Explain what you're doing and why. This provides additional context that can improve the accuracy of the generated code.

Generating React Hook Forms with Replay: A Step-by-Step Guide#

Here's how you can use Replay to generate React Hook Forms from a video recording:

Step 1: Record Your User Interaction#

Record a video of yourself interacting with the form you want to generate. This video should clearly demonstrate the following:

  1. All input fields and their expected values.
  2. Any validation rules you want to enforce (e.g., required fields, email format).
  3. Any conditional logic (e.g., showing/hiding fields based on user input).
  4. The form submission process.

📝 Note: The clearer your video, the better the results. Focus on smooth, deliberate interactions.

Step 2: Upload Your Video to Replay#

Upload the video to Replay. Replay will analyze the video and generate the corresponding React Hook Form code.

Step 3: Review and Customize the Generated Code#

Replay provides a preview of the generated code. Review the code carefully and make any necessary adjustments. You can customize the following:

  • Form schema.
  • Validation rules.
  • Styling.
  • Submission handler.

Step 4: Integrate the Code into Your React Application#

Copy the generated code and integrate it into your React application.

typescript
import { useForm } from 'react-hook-form'; import { zodResolver } from '@hookform/resolvers/zod'; import * as z from 'zod'; const schema = z.object({ name: z.string().min(2, { message: "Name must be at least 2 characters." }), email: z.string().email({ message: "Invalid email address." }), age: z.number().min(18, { message: "You must be at least 18 years old." }).optional(), }); type FormData = z.infer<typeof schema>; function MyForm() { const { register, handleSubmit, formState: { errors } } = useForm<FormData>({ resolver: zodResolver(schema) }); const onSubmit = (data: FormData) => { console.log(data); }; return ( <form onSubmit={handleSubmit(onSubmit)}> <label> Name: <input type="text" {...register("name")} /> {errors.name && <span>{errors.name.message}</span>} </label> <label> Email: <input type="email" {...register("email")} /> {errors.email && <span>{errors.email.message}</span>} </label> <label> Age (optional): <input type="number" {...register("age")} /> {errors.age && <span>{errors.age.message}</span>} </label> <button type="submit">Submit</button> </form> ); } export default MyForm;

⚠️ Warning: Always review and test the generated code before deploying it to production. AI can make mistakes, and it's crucial to ensure the code functions correctly.

Replay's Key Features for React Hook Forms Generation#

  • Multi-Page Form Generation: Replay can handle complex, multi-page forms with ease. Simply record a video of yourself navigating through the form, and Replay will generate the necessary code to manage the different pages and data flow.
  • Supabase Integration: Replay seamlessly integrates with Supabase, allowing you to automatically store form data in your Supabase database.
  • Style Injection: Replay can infer the styling of your form from the video and generate corresponding CSS or Tailwind CSS code.
  • Product Flow Maps: Replay visualizes the user flow through your form, making it easier to understand and debug the logic.

Benefits of Using Replay for React Hook Forms#

  • Increased Productivity: Generate complex forms in minutes instead of hours.
  • Reduced Errors: Eliminate manual coding errors and ensure consistent validation logic.
  • Improved Code Quality: Replay generates clean, well-structured code that is easy to maintain.
  • Faster Iteration: Quickly prototype and iterate on new form designs by simply recording a new video.

Beyond the Basics: Advanced Use Cases#

Replay isn't limited to simple forms. It can handle complex scenarios, including:

  • Dynamic Forms: Generate forms that adapt to user input.
  • Conditional Logic: Implement complex conditional logic based on user interactions.
  • Custom Validation: Enforce custom validation rules based on your specific requirements.
  • Integration with Third-Party APIs: Connect your forms to third-party APIs to retrieve and store data.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited features. Paid plans are available for more advanced features and higher usage limits. Check the pricing page for the latest details.

How is Replay different from v0.dev?#

v0.dev is a text-to-code tool. You describe the UI you want, and it generates code. Replay, on the other hand, is a video-to-code tool. You show Replay the UI in action, and it generates code based on your behavior. This makes Replay more accurate and capable of generating functional code, especially for complex interactions like forms. Replay focuses on behavior, not just appearance.

What types of videos work best with Replay?#

Clear, well-lit videos with deliberate user interactions produce the best results. Narrating your actions while recording can also improve accuracy. Avoid shaky camera movements and excessive background noise.

What frameworks does Replay support?#

Currently, Replay primarily focuses on React and React Hook Form. Support for other frameworks may be added in the future.


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