// reducer, actions, constants, etc. const mapState = (state) => ( count: state.counter.count ) const mapDispatch = increment, decrement

// store/userStore.js export const useUserStore = create((set) => ( user: null, setUser: ... )) // store/cartStore.js export const useCartStore = create((set) => ( items: [], addItem: ... )) Zustand supports Redux DevTools, persistence, and custom middleware.

However, given the structure of the word, it is highly likely that this is a of a popular and widely used state management library in the React ecosystem: Zustand (often misspelled as "zust2help" due to keyboard slips or auto-correct errors).

// Example: Only persist on client side const useStore = create( persist( (set) => ( /* state */ ), name: 'my-store', getStorage: () => if (typeof window !== 'undefined') return localStorage return dummyStorage , ) ) 1. Splitting Stores Avoid one giant store. Split by domain.

// Option 1: getState() const handleClick = () => const currentCount = useStore.getState().count console.log(currentCount)

Problem 1: Component Re-renders Too Often Issue: Using the entire store causes re-renders when any state changes.

// Update state useStore.setState( count: 100 )

// Option 2: Use useRef with store subscription Solution: Define your store's type.