React Hooks: A Deep Dive into Modern React

React Hooks have fundamentally changed how we write React components. Let's explore the power and flexibility they bring to modern development.

useState: Managing Local State

The useState hook is the foundation of state management in functional components.

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


useEffect: Side Effects and Lifecycle

useEffect combines componentDidMount, componentDidUpdate, and componentWillUnmount into a single API.

Custom Hooks: Reusable Logic

Create custom hooks to encapsulate and reuse stateful logic across components.

tsx
function useLocalStorage(key: string, initialValue: any) {
  const [storedValue, setStoredValue] = useState(() => {
    try {
      const item = window.localStorage.getItem(key);
      return item ? JSON.parse(item) : initialValue;
    } catch (error) {
      return initialValue;
    }
  });

  const setValue = (value: any) => {
    try {
      setStoredValue(value);
      window.localStorage.setItem(key, JSON.stringify(value));
    } catch (error) {
      console.error(error);
    }
  };

  return [storedValue, setValue];
}


Performance Optimization with useMemo and useCallback

Optimize expensive computations and prevent unnecessary re-renders.

Conclusion

React Hooks enable cleaner, more maintainable code. Embrace them to write better React applications.