What is React Hook Form?

React Hook Form is the form state management library integrated into Frontend Accelerator. It provides performant, flexible forms with minimal re-renders, built-in validation, and excellent TypeScript support. Combined with Zod, it creates the perfect form handling solution.

Basic usage:

import { useForm } from 'react-hook-form';

type FormInputs = {
  username: string;
  email: string;
};

export function MyForm() {
  const { register, handleSubmit, formState: { errors, isSubmitting } } = useForm<FormInputs>();

  const onSubmit = async (data: FormInputs) => {
    await saveUser(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <input {...register('username', { required: true })} />
      <input {...register('email', { required: true, pattern: /^\S+@\S+$/i })} />
      <button disabled={isSubmitting}>Submit</button>
    </form>
  );
}

Key features:

• Performance: Minimal re-renders, isolated field updates
• Tiny bundle: Only 9KB gzipped
• TypeScript: Full type safety with form data
• DX: Simple API with intuitive hooks
• Validation: Built-in rules or custom validators (Zod)
• Integration: Works seamlessly with UI libraries

Form state access:

const { isDirty, isValid, touchedFields, dirtyFields } = formState;

AI-Friendly: The register pattern and hook-based API are explicit and predictable. AI tools understand form field registration, can generate form schemas, suggest appropriate validation rules, and handle complex form state management scenarios with ease.