React 19 Custom Hooks Explained | Reuse Logic Like a Pro (Day 10)

React 19 Custom Hooks Explained | Reuse Logic Like a Pro (Day 10)

In Day 10 of the React 19 Playlist, we learn one of the most important patterns used by professional React developers — Custom Hooks.

As your React apps grow, logic starts repeating across components.
UI may look different, but the state, effects, and behavior remain the same.
That is where custom hooks solve the problem cleanly.

What you will learn in this video 👇

✅ Why custom hooks exist
✅ Difference between UI reuse and logic reuse
✅ How to create your first custom hook
✅ Writing reusable hooks using useState and useEffect
✅ Following official React hook rules
✅ When to create a custom hook and when not to
✅ Writing cleaner, scalable React architecture

We will start by identifying bad patterns like repeated state and effect logic, then refactor them into clean, reusable hooks.

Concepts covered with real examples

useCounter custom hook

useFetch custom hook for API calls

Sharing logic across multiple components

Cleaner UI components with separated logic

🔥 Important mindset

Custom hooks share logic, not UI.

You will also learn industry conventions, naming rules, and common mistakes developers make while creating hooks.

React 19 Context

Custom hooks work perfectly with React 19 concurrent rendering and integrate smoothly with modern patterns like server actions and optimized rendering.

📝 Homework

Create a useToggle hook

Create a useLocalStorage hook

Use each hook in at least 2 components

🔜 Next Video (Day 11)

Context API — global state management without prop drilling.

📌 React 19 Playlist Progress

Day 10 Covered:

Why custom hooks

How to create custom hooks

Logic reuse across components

Clean and scalable React architecture

This video will significantly improve how you structure real-world React applications.