Custom Hooks and Component Abstractions

1. Introduction

In modern UI frameworks like React, custom hooks and component abstractions provide a powerful way to manage state and share logic across components. This lesson will delve into these concepts, providing definitions, step-by-step processes, and best practices.

2. Custom Hooks

Custom hooks are functions that allow you to reuse stateful logic across components. They follow the naming convention of starting with "use" and can utilize built-in hooks to manage state, side effects, or context.

const useFetch = (url) => {
    const [data, setData] = useState(null);
    const [loading, setLoading] = useState(true);
    const [error, setError] = useState(null);

    useEffect(() => {
        const fetchData = async () => {
            try {
                const response = await fetch(url);
                const result = await response.json();
                setData(result);
            } catch (err) {
                setError(err);
            } finally {
                setLoading(false);
            }
        };

        fetchData();
    }, [url]);

    return { data, loading, error };
};
            

3. Component Abstractions

Component abstractions allow you to encapsulate logic and UI elements into reusable components. This promotes separation of concerns and enhances readability.

const Button = ({ onClick, children }) => {
    return (
        
            {children}
        
    );
};
            

4. Best Practices

• Keep custom hooks focused on one specific piece of logic.
• Use hooks only at the top level of your components.
• Document your hooks and components clearly for future reference.
• Test your hooks for edge cases and ensure they behave as expected.

5. FAQ