React 17 - Handling dynamic form fields with validation without losing state on re-renders
I've spent hours debugging this and I've tried everything I can think of but I'm working on a dynamic form in React 17 where users can add or remove fields as needed... I've implemented basic validation for the fields, but I'm running into issues where the state of the form resets whenever I add or remove a field. Here’s a simplified version of what I have: ```jsx import React, { useState } from 'react'; const DynamicForm = () => { const [fields, setFields] = useState([{ value: '', error: '' }]); const handleChange = (index, event) => { const newFields = [...fields]; newFields[index].value = event.target.value; newFields[index].error = event.target.value.length < 3 ? 'Minimum 3 characters required' : ''; setFields(newFields); }; const addField = () => { setFields([...fields, { value: '', error: '' }]); }; const removeField = (index) => { const newFields = fields.filter((_, i) => i !== index); setFields(newFields); }; return ( <div> {fields.map((field, index) => ( <div key={index}> <input type="text" value={field.value} onChange={(e) => handleChange(index, e)} /> {field.error && <span style={{ color: 'red' }}>{field.error}</span>} <button type="button" onClick={() => removeField(index)}>Remove</button> </div> ))} <button type="button" onClick={addField}>Add Field</button> </div> ); }; export default DynamicForm; ``` The issue arises after I add or remove a field; the validation messages reset, and it seems like the state does not persist correctly. The error messages are not being retained for the fields that are still present. I’ve tried using `useEffect` to manage the state better, but that leads to more complexities, especially with how I manage the index of each field. I also considered using Formik for form management, but I'm not sure if it will solve my specific issue regarding dynamic field validation. If anyone has suggestions on how to properly handle such cases without losing state during re-renders, I would greatly appreciate it! Any help would be greatly appreciated! This is for a web app running on Debian. What would be the recommended way to handle this?