React 18: How to properly handle nested state updates with useState while ensuring performance?
I'm dealing with I've been working on this all day and I'm working on a React 18 application where I need to manage a nested state object using the `useState` hook..... The structure of my state looks something like this: ```javascript const [formData, setFormData] = useState({ user: { name: '', email: '' }, preferences: { notifications: true, darkMode: false } }); ``` I'm trying to update the `name` property under `user`, and every time I do this, I want to retain the existing state for `preferences`. However, the way I'm currently attempting to update the state seems to be causing performance issues and unnecessary re-renders. Here's the code I'm using to handle the change: ```javascript const handleChange = (e) => { const { name, value } = e.target; setFormData((prevState) => ({ ...prevState, user: { ...prevState.user, [name]: value } })); }; ``` While this works, I noticed that any update to the `user` object triggers a re-render of the entire component. When I log the renders, I see that even when I update just the `name`, the `preferences` section still gets re-evaluated, which affects performance especially when the component grows larger with more complex state. I've tried using `useCallback` to memoize the `handleChange` function, but it hasn't improved the situation. Additionally, I'm concerned about maintaining immutability in a way that doesn't complicate the state updates further. Is there a more efficient way to handle nested state updates in React 18 that can help minimize re-renders? I've also considered switching to a state management library but would prefer to keep it simple if possible. Any insights or best practices would be greatly appreciated! For context: I'm using Javascript on Windows. What am I doing wrong? Any suggestions would be helpful.