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// Subscribe to changes store.subscribe((state) => console.log('State changed:', state))

name: 'app-storage', // unique key in localStorage storage: createJSONStorage(() => localStorage), // use sessionStorage if preferred

// In _app.js or layout if (typeof window === 'undefined') // Server-side: fresh store per request useStore.setState( bears: 0 ) zust4help full

If you searched for "zust4help full" , you likely want —from basic stores to advanced middleware and best practices. This article is that resource.

| Feature | Zustand | Redux Toolkit | Context + useReducer | |---------|---------|---------------|----------------------| | Boilerplate | Very low | Medium | High | | Provider required | No | Yes | Yes | | DevTools support | Yes (middleware) | Yes | No | | Async actions | Native | Thunk/Saga | Manual | | Performance | Excellent | Good | Poor (re-renders) | | Learning curve | Minimal | Steep | Moderate | | Bundle size | ~1.5 kB | ~15 kB | ~0 kB (built-in) | Part 8: Real-World Example – Complete E-Commerce Cart import create from 'zustand' import persist from 'zustand/middleware' import shallow from 'zustand/shallow' const useCartStore = create( persist( (set, get) => ( items: [], addItem: (product) => set((state) => const existing = state.items.find((i) => i.id === product.id) if (existing) return items: state.items.map((i) => i.id === product.id ? ...i, quantity: i.quantity + 1 : i ), // Subscribe to changes store

// Dispatch actions store.getState().increment() console.log(store.getState().count) // 1

import createStore from 'zustand/vanilla' const store = createStore((set) => ( count: 0, increment: () => set((state) => ( count: state.count + 1 )), )) ( count: 0

// store/index.js import create from 'zustand' import createUserSlice from './slices/userSlice' import createCartSlice from './slices/cartSlice'