Zust4help Full May 2026

❌ Wrong:

const  count, increment, user  = useStore() // re-renders on ANY change

✅ Correct:

const count = useStore((state) => state.count)
const increment = useStore((state) => state.increment)

Or use shallow for objects:

import  shallow  from 'zustand/shallow'
const  count, user  = useStore((state) => ( count: state.count, user: state.user ), shallow)

const useStore = create((set) => (
  user:  name: 'John', age: 30 ,
  posts: [],
  comments: []
))
// Custom selectors
const useUserName = () => useStore((state) => state.user.name)
const useUserAge = () => useStore((state) => state.user.age)

| Feature | Zustand | Redux | Context API | |------------------------|---------|-------|--------------| | Boilerplate | Very low | High | Medium | | Re-render control | Automatic | Manual | Poor | | Middleware support | Yes | Yes | No | | DevTools | Yes | Yes | No | | Concurrent rendering | Safe | Safe | Safe |

Zustand excels when you need a global store without complex configuration. zust4help full

// store/index.js
import  create  from 'zustand'
import  devtools, persist, subscribeWithSelector  from 'zustand/middleware'
const initialState = 
user: null,
notifications: [],
isHydrated: false

export const useAppStore = create(
devtools(
persist(
subscribeWithSelector((set, get) => (
...initialState,
login: async (email, pass) => 
const user = await api.login(email, pass)
set( user , false, 'user/login')
,
logout: () => set(initialState, false, 'user/logout'),
addNotification: (msg) =>
set((state) => (
notifications: [...state.notifications,  msg, id: Date.now() ]
)),
clearNotifications: () => set( notifications: [] ),
setHydrated: () => set( isHydrated: true )
)),
 name: 'app-storage', onRehydrateStorage: () => (state) => state.setHydrated() 
),
 name: 'AppStore', enabled: process.env.NODE_ENV === 'development' 
)
)
 ❌ Wrong: const count, increment, user = useStore()