React 18: Handling state updates with useState and prop changes causing advanced patterns
I'm having trouble with I need some guidance on I'm trying to debug I'm testing a new approach and I've been researching this but I'm dealing with I'm working with a frustrating scenario with my React 18 application where state updates in a child component don't seem to reflect when the props change from the parent component... I have a parent component that manages a list of items and passes a specific item to a child component for editing. However, when I update the item in the parent and pass the new value down as a prop, the child doesn't re-render with the new data as expected. Here's a simplified version of my code: ```javascript // ParentComponent.js import React, { useState } from 'react'; import ChildComponent from './ChildComponent'; const ParentComponent = () => { const [items, setItems] = useState([{ id: 1, name: 'Item 1' }, { id: 2, name: 'Item 2' }]); const [selectedItem, setSelectedItem] = useState(items[0]); const updateItem = (id, newName) => { const updatedItems = items.map(item => item.id === id ? { ...item, name: newName } : item ); setItems(updatedItems); setSelectedItem(updatedItems.find(item => item.id === id)); }; return ( <div> <ChildComponent item={selectedItem} onUpdateItem={updateItem} /> <button onClick={() => updateItem(1, 'Updated Item 1')}>Update Item 1</button> </div> ); }; export default ParentComponent; ``` ```javascript // ChildComponent.js import React, { useEffect, useState } from 'react'; const ChildComponent = ({ item, onUpdateItem }) => { const [name, setName] = useState(item.name); useEffect(() => { setName(item.name); }, [item]); const handleSave = () => { onUpdateItem(item.id, name); }; return ( <div> <input type="text" value={name} onChange={(e) => setName(e.target.value)} /> <button onClick={handleSave}>Save</button> </div> ); }; export default ChildComponent; ``` The question occurs when I click the 'Update Item 1' button in the parent. The child component updates its internal state (`name`) based on the prop, but it doesn't seem to hold the latest value after the update. Instead, the input field still shows the old value. The console shows no errors, but the behavior is unexpected. I've tried using `useEffect` in the child to sync the state with the prop changes, but it doesn't work as expected. I also verified that the prop is indeed updated by logging the `item` prop in the child component. What could be causing this scenario? Any insights or best practices for properly handling this kind of state management between parent and child components in React 18 would be appreciated! For reference, this is a production REST API. What am I doing wrong? I appreciate any insights! For reference, this is a production web app. Could someone point me to the right documentation? I'm working on a microservice that needs to handle this. I'd love to hear your thoughts on this. I recently upgraded to Javascript 3.11. Any examples would be super helpful.