Why Custom hook best practices in React? - Purpose & Use Cases

The Big Idea

Discover how custom hooks can save you hours of debugging and rewriting code!

The Scenario

Imagine copying and pasting the same state logic across multiple React components to handle user input or data fetching.

The Problem

This manual repetition leads to bugs, inconsistent behavior, and makes your code hard to maintain or update.

The Solution

Custom hooks let you extract and share reusable logic cleanly, so your components stay simple and consistent.

Before vs After

✗ Before

function ComponentA() { const [count, setCount] = React.useState(0); React.useEffect(() => { console.log(count); }, [count]); return <button onClick={() => setCount(count + 1)}>Click</button>; } function ComponentB() { const [count, setCount] = React.useState(0); React.useEffect(() => { console.log(count); }, [count]); return <button onClick={() => setCount(count + 1)}>Click</button>; }

✓ After

function useCounter() { const [count, setCount] = React.useState(0); React.useEffect(() => { console.log(count); }, [count]); return [count, setCount]; } function ComponentA() { const [count, setCount] = useCounter(); return <button onClick={() => setCount(count + 1)}>Click</button>; } function ComponentB() { const [count, setCount] = useCounter(); return <button onClick={() => setCount(count + 1)}>Click</button>; }

What It Enables

It enables clean, reusable, and maintainable code by sharing logic across components effortlessly.

Real Life Example

Sharing form validation logic between multiple input fields without repeating code in each component.

Key Takeaways

Custom hooks help avoid code duplication.

They keep components focused on UI, not logic.

Following best practices makes your app easier to maintain.