React Hooks: A Complete Guide

React Hooks revolutionized how we write React components. They allow us to use state and other React features in functional components.

useState Hook

The most fundamental hook for managing state:

const [count, setCount] = useState(0);

return (
    <button onClick={() => setCount(count + 1)}>
        Clicked {count} times
    </button>
);

useEffect Hook

Handle side effects like data fetching and subscriptions:

useEffect(() => {
    fetchData();
    return () => cleanup();
}, [dependency]);

Custom Hooks

Create reusable logic with custom hooks:

• Extract common patterns
• Share stateful logic between components
• Keep components clean and focused

Best Practices

When working with hooks, remember:

• Only call hooks at the top level
• Only call hooks from React functions
• Use the ESLint plugin for hooks

We'll also discuss common pitfalls and how to optimize your hooks for better performance.