Pros of react-hook-form

• More mature and widely adopted, with a larger community and ecosystem
• Extensive documentation and examples available
• Performance optimized for large forms with minimal re-renders

Cons of react-hook-form

• Steeper learning curve due to more complex API
• Less flexibility in form structure and validation rules
• Heavier bundle size compared to modular-forms

Code Comparison

react-hook-form:

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

const { register, handleSubmit } = useForm();
const onSubmit = data => console.log(data);

<form onSubmit={handleSubmit(onSubmit)}>
  <input {...register("firstName")} />
  <input type="submit" />
</form>

modular-forms:

import { useForm } from "@modular-forms/react";

const [form, { Field }] = useForm();
const handleSubmit = (values) => console.log(values);

<form.Form onSubmit={handleSubmit}>
  <Field name="firstName">
    {(field) => <input {...field} />}
  </Field>
  <button type="submit">Submit</button>
</form.Form>

Both libraries aim to simplify form handling in React applications, but they differ in their approach and feature set. react-hook-form offers a more comprehensive solution with advanced features, while modular-forms provides a lighter, more flexible alternative with a focus on modularity and ease of use.

Pros of Formik

• More mature and widely adopted in the React ecosystem
• Extensive documentation and community support
• Integrates well with popular UI libraries and form validation schemas

Cons of Formik

• Larger bundle size, which may impact performance in smaller applications
• More opinionated approach, which can be limiting for complex custom forms
• Steeper learning curve for beginners due to its comprehensive feature set

Code Comparison

Formik:

import { Formik, Form, Field } from 'formik';

<Formik initialValues={{ email: '' }} onSubmit={handleSubmit}>
  <Form>
    <Field name="email" type="email" />
    <button type="submit">Submit</button>
  </Form>
</Formik>

Modular Forms:

import { useForm, email } from '@modular-forms/react';

const [form, { Field }] = useForm({
  initialValues: { email: '' },
  onSubmit: handleSubmit,
});

<form use:form>
  <Field name="email" type="email" validate={email()} />
  <button type="submit">Submit</button>
</form>

Both libraries aim to simplify form management in React applications, but Formik offers a more comprehensive solution with wider adoption, while Modular Forms provides a lighter-weight alternative with a focus on modularity and performance.

Pros of Unform

• More comprehensive form library with a wider range of form components
• Better integration with React Native, supporting mobile development
• Larger community and more frequent updates

Cons of Unform

• Steeper learning curve due to its extensive API
• Heavier bundle size compared to Modular Forms
• Less focus on performance optimization

Code Comparison

Unform:

import { Form } from '@unform/web';
import Input from './components/Input';

function MyForm() {
  const handleSubmit = (data) => {
    console.log(data);
  };

  return (
    <Form onSubmit={handleSubmit}>
      <Input name="email" />
      <button type="submit">Submit</button>
    </Form>
  );
}

Modular Forms:

import { useForm } from '@modular-forms/react';

function MyForm() {
  const [form, { Field }] = useForm();

  const handleSubmit = (data) => {
    console.log(data);
  };

  return (
    <form onSubmit={form.handleSubmit(handleSubmit)}>
      <Field name="email">
        {(field) => <input {...field} />}
      </Field>
      <button type="submit">Submit</button>
    </form>
  );
}

Pros of react-final-form

• More mature and widely adopted, with a larger community and ecosystem
• Offers a more flexible API, allowing for complex form scenarios
• Better documentation and examples available

Cons of react-final-form

• Larger bundle size due to its extensive feature set
• Steeper learning curve for beginners
• Less focus on modern React patterns like hooks

Code Comparison

react-final-form:

import { Form, Field } from 'react-final-form'

<Form
  onSubmit={onSubmit}
  render={({ handleSubmit }) => (
    <form onSubmit={handleSubmit}>
      <Field name="firstName" component="input" />
    </form>
  )}
/>

modular-forms:

import { useForm, email, required } from 'modular-forms'

const [form, { Field }] = useForm({
  initialValues: { email: '' },
  validate: { email: [required(), email()] }
})

<form onSubmit={form.handleSubmit}>
  <Field name="email" />
</form>

modular-forms focuses on a more modern, hook-based approach with built-in validation, while react-final-form offers a render prop pattern with separate validation logic. modular-forms provides a more concise API for simple forms, but react-final-form's flexibility may be advantageous for complex scenarios.

Pros of TanStack Form

• Framework-agnostic, supporting React, Vue, Solid, and Svelte
• More comprehensive feature set, including advanced validation and error handling
• Larger community and ecosystem, with more frequent updates and contributions

Cons of TanStack Form

• Steeper learning curve due to its more complex API and extensive features
• Larger bundle size, which may impact performance in smaller projects
• Less opinionated, requiring more setup and configuration

Code Comparison

Modular Forms:

import { useForm } from '@modular-forms/react';

const form = useForm({
  initialValues: { name: '', email: '' },
  onSubmit: values => console.log(values),
});

TanStack Form:

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

const form = useForm({
  defaultValues: { name: '', email: '' },
  onSubmit: async values => console.log(values),
});

Both libraries offer similar basic functionality, but TanStack Form provides more advanced features and configuration options out of the box. Modular Forms focuses on simplicity and ease of use, while TanStack Form offers greater flexibility and power at the cost of increased complexity.