Pros of Formik

• More active development and larger community support
• Built-in Yup integration for schema validation
• Better TypeScript support and type definitions

Cons of Formik

• Steeper learning curve for beginners
• More verbose setup for simple forms
• Larger bundle size compared to Formsy-React

Code Comparison

Formik:

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

<Formik
  initialValues={{ email: '', password: '' }}
  onSubmit={(values) => console.log(values)}
>
  <Form>
    <Field name="email" type="email" />
    <Field name="password" type="password" />
    <button type="submit">Submit</button>
  </Form>
</Formik>

Formsy-React:

import Formsy from 'formsy-react';
import { Input } from 'formsy-react-components';

<Formsy onSubmit={(values) => console.log(values)}>
  <Input name="email" type="email" />
  <Input name="password" type="password" />
  <button type="submit">Submit</button>
</Formsy>

Formik offers more flexibility and features but requires more setup, while Formsy-React provides a simpler API for basic form handling. Formik's popularity and active development make it a more future-proof choice for complex form management in React applications.

Pros of react-hook-form

• Lightweight and performant, with minimal re-renders
• Built-in validation and error handling
• Seamless integration with TypeScript

Cons of react-hook-form

• Steeper learning curve for developers new to React Hooks
• Less opinionated, which may require more setup for complex forms

Code Comparison

formsy-react:

<Formsy onSubmit={this.submit}>
  <MyInput name="email" validations="isEmail" validationError="Invalid email" required />
  <button type="submit">Submit</button>
</Formsy>

react-hook-form:

const { register, handleSubmit, errors } = useForm();
return (
  <form onSubmit={handleSubmit(onSubmit)}>
    <input name="email" ref={register({ required: true, pattern: /^\S+@\S+$/i })} />
    {errors.email && <span>This field is required</span>}
    <button type="submit">Submit</button>
  </form>
);

react-hook-form offers a more modern approach using hooks, while formsy-react uses a higher-order component pattern. react-hook-form provides more flexibility and control over form state and validation, but may require more setup. formsy-react offers a simpler API for basic forms but may be less flexible for complex scenarios.

Pros of react-final-form

• More flexible and customizable, allowing for complex form structures
• Better performance with large forms due to optimized rendering
• Supports asynchronous validation and submission out of the box

Cons of react-final-form

• Steeper learning curve, especially for beginners
• Requires more boilerplate code for basic forms
• Less opinionated, which may lead to inconsistent implementations across projects

Code Comparison

formsy-react:

<Formsy onSubmit={this.submit}>
  <MyInput name="email" validations="isEmail" validationError="Invalid email" required />
  <button type="submit">Submit</button>
</Formsy>

react-final-form:

<Form
  onSubmit={onSubmit}
  render={({ handleSubmit }) => (
    <form onSubmit={handleSubmit}>
      <Field name="email" validate={isEmail}>
        {({ input, meta }) => (
          <div>
            <input {...input} type="email" placeholder="Email" />
            {meta.error && meta.touched && <span>{meta.error}</span>}
          </div>
        )}
      </Field>
      <button type="submit">Submit</button>
    </form>
  )}
/>

Pros of unform

• More modern and actively maintained, with recent updates and releases
• Built with TypeScript, offering better type safety and developer experience
• Supports React Native out of the box, providing a unified solution for web and mobile

Cons of unform

• Steeper learning curve due to its more complex API and concepts
• Less extensive documentation compared to formsy-react
• Smaller community and fewer third-party integrations

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>
  );
}

formsy-react:

import Formsy from 'formsy-react';
import MyInput from './MyInput';

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

  return (
    <Formsy onSubmit={handleSubmit}>
      <MyInput name="email" validations="isEmail" />
      <button type="submit">Submit</button>
    </Formsy>
  );
}

The code comparison shows that unform uses a more modern approach with custom components, while formsy-react relies on higher-order components and predefined validations. unform's API is more flexible but requires more setup, whereas formsy-react offers a simpler, more opinionated structure.

Pros of TanStack Form

• More modern and actively maintained, with regular updates and improvements
• Offers a flexible, headless approach that works with any UI library or framework
• Provides advanced features like form state management and field array handling

Cons of TanStack Form

• Steeper learning curve due to its more complex API and concepts
• Requires more setup and configuration compared to Formsy-React's simpler approach
• May be overkill for basic form handling needs

Code Comparison

Formsy-React:

import { withFormsy } from 'formsy-react';

const MyInput = withFormsy(({ setValue, getValue, errorMessage }) => (
  <div>
    <input onChange={e => setValue(e.target.value)} value={getValue() || ''} />
    <span>{errorMessage}</span>
  </div>
));

TanStack Form:

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

const MyForm = () => {
  const form = useForm({
    defaultValues: { name: '' },
    onSubmit: values => console.log(values),
  });
  return (
    <form.Field name="name">
      {field => <input {...field.getInputProps()} />}
    </form.Field>
  );
};

Pros of redux-form

• Seamless integration with Redux, allowing for centralized state management
• Robust validation and error handling capabilities
• Extensive documentation and community support

Cons of redux-form

• Steeper learning curve, especially for developers new to Redux
• Can be overkill for simple forms or projects not using Redux
• Performance concerns with large forms due to frequent re-renders

Code Comparison

redux-form:

import { reduxForm, Field } from 'redux-form';

const MyForm = ({ handleSubmit }) => (
  <form onSubmit={handleSubmit}>
    <Field name="username" component="input" type="text" />
    <button type="submit">Submit</button>
  </form>
);

export default reduxForm({ form: 'myForm' })(MyForm);

formsy-react:

import { Formsy, Form, Input } from 'formsy-react';

const MyForm = () => (
  <Formsy onSubmit={handleSubmit}>
    <Input name="username" type="text" />
    <button type="submit">Submit</button>
  </Formsy>
);

export default MyForm;

Both libraries provide form handling solutions for React applications, but redux-form is more tightly coupled with Redux and offers more advanced features. formsy-react, on the other hand, is simpler to set up and use, making it a good choice for projects that don't require complex form management or Redux integration.