Optimizing Complex Forms for Server-Side Rendering

Illustrate strategies for managing complex form states and optimizing forms for server-side rendering scenarios with TanStack Form, including tips for handling initial form state and hydration.

import { useForm } from '@tanstack/react-form';
import { useEffect } from 'react';

Imports useForm hook from TanStack Form and useEffect from React.

const SSRForm = ({ initialData }) => {
  const { Form, setFormState } = useForm({
    defaultValues: {},
  });

Defines a component SSRForm that accepts initialData. Initializes the form with default values using useForm.

useEffect(() => {
    setFormState(current => ({
      ...current,
      values: initialData,
    }));
  }, [initialData, setFormState]);

Uses useEffect to update the form state with initialData when the component mounts or initialData changes. This step is crucial for hydrating the form with server-side rendered data.

return (
    <Form>
      {/* Form fields here */}
    </Form>
  );
};

Renders the form. Insert form fields within the Form component.

export default SSRForm;

Exports the SSRForm component for use in server-side rendered applications.