React 18: Handling State Updates in a Complex Nested Object using useState
Hey everyone, I'm running into an issue that's driving me crazy. I'm getting frustrated with After trying multiple solutions online, I still can't figure this out... I'm working on a personal project and I'm working with a question where updating a deeply nested object in state using `useState` is causing my React component to re-render incorrectly. I have a state object structured as follows: ```javascript const [state, setState] = useState({ user: { name: '', address: { city: '', zip: '' } } }); ``` I'm trying to update the `city` property in the `address` object, but when I do, it looks like the entire `user` object is being marked as changed, causing unnecessary re-renders of child components that depend on other properties of the `user` object. I've tried using the spread operator to update the nested object like this: ```javascript const updateCity = (newCity) => { setState(prevState => ({ ...prevState, user: { ...prevState.user, address: { ...prevState.user.address, city: newCity } } })); }; ``` However, I'm still seeing performance optimization, especially when this update is triggered frequently (such as on every keystroke in an input field). The console logs show the component is re-rendering more often than I expect. I checked the React DevTools profiler and saw that it's not just the component that uses the `city` state, but its parent components are also re-rendering. Is there a better way to handle updates to deeply nested state objects in React 18? Should I consider using a library like Immer for this, or is there a more efficient way to structure my state to minimize re-renders? This is part of a larger CLI tool I'm building. What's the best practice here? My development environment is macOS. How would you solve this? Any help would be greatly appreciated! Any ideas what could be causing this? I recently upgraded to Javascript stable. Thanks for your help in advance!