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The selector (state) => state.bears ensures your component only re-renders when bears changes—unlike Context API which re-renders on any change. Part 2: Advanced Store Patterns (Full Help) 1. Combining State and Actions Unlike Redux, actions don’t need to be separate. Zustand allows combining them naturally:

// Subscribe to changes store.subscribe((state) => console.log('State changed:', state)) zust4help full

// Usage in component function CartSummary() const [totalItems, totalPrice] = useCartStore( (state) => [state.totalItems(), state.totalPrice()], shallow ) return <div>totalItems items - $totalPrice</div> The selector (state) =&gt; state

const useTodoStore = create((set) => ( todos: [], fetchTodos: async () => const response = await fetch('https://jsonplaceholder.typicode.com/todos') const data = await response.json() set( todos: data ) , addTodo: (title) => set((state) => ( todos: [...state.todos, id: Date.now(), title, completed: false ] )) )) For large apps, split your store: Zustand allows combining them naturally: // Subscribe to