What “Hooks Best Practices” Actually Mean in React

When learning React hooks, it’s easy to assume that “best practices” means memorizing a list of rules.

But most of those rules already exist in React itself.

You can’t call hooks conditionally.

You can’t call them inside loops.

They must run in the same order.

Those are the Rules of Hooks.

Best practices, on the other hand, are more subtle. They’re less about correctness and more about how to structure logic so hooks remain predictable and maintainable as an application grows.

Keep Hooks at the Top Level

React relies on the order of hooks to track state between renders.

Because of that, hooks must always run in the same order.

This is why code like this breaks:

if (isLoggedIn) {
  useEffect(() => {
    console.log("user logged in")
  }, [])
}

The hook may run on one render but not the next.

Instead, the condition should move inside the hook.

useEffect(() => {
  if (isLoggedIn) {
    console.log("user logged in")
  }
}, [isLoggedIn])

The hook always runs, but the logic inside it can still be conditional.

Keep Hooks Focused on One Responsibility

Hooks become difficult to understand when they try to control too many things at once.

A hook that handles data fetching, form state, modal behavior, and scroll tracking is doing too much.

Instead of creating one large hook, break them into smaller behavioral units.

const user = useUser()
const form = useForm()
const modal = useModal()
const scroll = useScrollPosition()

Each hook now represents a single piece of behavior.

Start Simple Before Reaching for Advanced Hooks

Hooks like useMemo, useCallback, and useReducer can be useful, but they’re often introduced too early.

React is designed to handle normal re-renders efficiently. In many cases, the simplest version is already good enough.

For example:

const handleClick = () => setCount(c => c + 1)

This is perfectly fine in most situations.

Optimization hooks should only appear when identity or computation actually becomes a problem.

Let Components Focus on UI

A common sign that logic should be extracted into a hook is when a component starts mixing UI and behavior heavily.

For example:

function Profile() {
  const [user, setUser] = useState(null)
  const [loading, setLoading] = useState(true)

  useEffect(() => {
    fetchUser().then(data => {
      setUser(data)
      setLoading(false)
    })
  }, [])

  if (loading) return <Spinner />

  return <div>{user.name}</div>
}

This works, but the logic is tightly coupled to the component.

Extracting it into a hook separates concerns.

function useUser() {
  const [user, setUser] = useState(null)
  const [loading, setLoading] = useState(true)

  useEffect(() => {
    fetchUser().then(data => {
      setUser(data)
      setLoading(false)
    })
  }, [])

  return { user, loading }
}

Now the component becomes simpler and easier to read.

Return Clear APIs From Custom Hooks

A good custom hook behaves like a small API.

Instead of returning an unclear object:

const data = useForm()

Return something more descriptive:

const { values, errors, handleChange, handleSubmit } = useForm()

This makes the hook easier to understand for anyone using it.

Avoid Unnecessary Dependencies

Hooks like useEffect rely on dependency arrays to know when to run.

A common mistake is depending on functions that change every render.

useEffect(() => {
  fetchUser(userId)
}, [fetchUser])

If fetchUser is recreated every render, the effect runs every render.

Often the better dependency is the actual data being used.

useEffect(() => {
  fetchUser(userId)
}, [userId])

Dependencies should represent real data changes, not implementation details.

Not Everything Needs to Be a Hook

Sometimes developers turn every reusable piece of logic into a hook.

But hooks are only necessary when the logic interacts with React’s lifecycle or state.

If something is just a calculation:

function calculateTotal(items) {
  return items.reduce((sum, item) => sum + item.price, 0)
}

It should remain a normal utility function.

Hooks are for stateful or reactive behavior, not simple computation.

The Structure That Usually Works Best

In many well-structured React applications, things naturally fall into three layers.

Components describe the UI.

Hooks describe behavior.

Utilities describe pure logic.

When those responsibilities are separated clearly, hooks stop feeling like scattered tools and start forming a clean system for organizing application logic.