What is React Final Form and how do I use it?

What is React Final Form and how do I use it?

React Final Form is a library for managing form state in React applications. It provides a simple API to handle form inputs, validation, and submission.

What are the main features of React Final Form?

Some key features include field-level validation, easy integration with existing forms, and support for complex form structures.

Can you show me a basic example of how to implement it?

Sure! Here's a simple example:

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

const MyForm = () => (
  <Form
    onSubmit={formValues => console.log(formValues)}
    render={({ handleSubmit }) => (
      <form onSubmit={handleSubmit}>
        <Field name="firstName">
          {({ input }) => <input {...input} placeholder="First Name" />}
        </Field>
        <button type="submit">Submit</button>
      </form>
    )}
  />
);

This creates a form with a single input for the first name.

How does validation work in React Final Form?

Validation can be done at the field level or form level. You can pass a validation function to the Field component to validate inputs individually.