ReactJS - Issues with nested component state updates causing stale closures in event handlers
I'm reviewing some code and I've tried everything I can think of but I've been banging my head against this for hours. I’m having trouble with stale closures in my React components when dealing with nested state updates. I have a main `App` component that manages a list of items and each item has a nested component that can toggle a boolean state. When the toggle is activated, I seem to always get the previous state instead of the latest one. Here’s a simplified version of my code: ```jsx const App = () => { const [items, setItems] = React.useState([ { id: 1, isActive: false }, { id: 2, isActive: false } ]); const toggleItem = (id) => { setItems((prevItems) => prevItems.map((item) => item.id === id ? { ...item, isActive: !item.isActive } : item ) ); }; return ( <div> {items.map((item) => ( <Item key={item.id} item={item} toggleItem={toggleItem} /> ))} </div> ); }; const Item = ({ item, toggleItem }) => { const handleClick = () => { toggleItem(item.id); console.log('Current state:', item.isActive); // This logs previous state }; return <button onClick={handleClick}>Toggle</button>; }; ``` In this setup, when I click the toggle button for an item, the console log always shows the previous `isActive` state instead of the updated one. I’ve tried using `useCallback` for `toggleItem` but it didn’t help. I also explored using `useEffect` to watch for changes in the items state, but that seems like overkill for such a simple task. Is there a recommended way to ensure that the latest state is referenced in event handlers like this? Any insights or patterns that I might be missing would be greatly appreciated! This is part of a larger application I'm building. Has anyone else encountered this? What am I doing wrong? Am I missing something obvious?