React: Handling complex nested state updates with useReducer and immutability issues
I'm performance testing and I'm trying to figure out I'm trying to implement I'm confused about I tried several approaches but none seem to work... I'm currently working on a React application where I'm using `useReducer` to manage a deeply nested state structure for my user interface. The state looks something like this: ```javascript const initialState = { user: { details: { name: '', age: 0 }, preferences: { theme: 'light', notifications: true } } }; ``` I'm trying to update the user's name and the theme preference simultaneously, but I'm running into issues with immutability. My reducer function currently looks like this: ```javascript const reducer = (state, action) => { switch (action.type) { case 'UPDATE_NAME': return { ...state, user: { ...state.user, details: { ...state.user.details, name: action.payload.name } } }; case 'UPDATE_THEME': return { ...state, user: { ...state.user, preferences: { ...state.user.preferences, theme: action.payload.theme } } }; default: return state; } }; ``` When I dispatch both actions in quick succession like this: ```javascript dispatch({ type: 'UPDATE_NAME', payload: { name: 'John Doe' } }); dispatch({ type: 'UPDATE_THEME', payload: { theme: 'dark' } }); ``` I notice that the updates seem to conflict and sometimes the name resets to an empty string. I suspect it might be because of how I'm managing the state updates and the order in which they are processed. Additionally, I'm using React 17 and noticed that the console outputs potential performance warnings regarding unnecessary re-renders when updating state. How can I ensure that both updates happen correctly without conflicting with each other? Is there a more effective way to handle such nested updates in the state without running into immutability issues or performance warnings? For context: I'm using Javascript on Windows. I appreciate any insights! The stack includes Javascript and several other technologies. Any ideas what could be causing this? This is my first time working with Javascript 3.10. Has anyone dealt with something similar?