What causes React components to re-render?

What causes React components to re-render?

React components re-render when their state or props change. This can happen due to user interactions, API calls, or parent component updates.

Can you explain how the useEffect hook affects re-renders?

The useEffect hook allows you to perform side effects in function components. It can control when a component re-renders based on dependencies you specify.

Are there ways to optimize re-renders in React?

Yes, you can optimize re-renders by using React.memo, useCallback, and useMemo to prevent unnecessary updates.

What is the difference between state and props in terms of re-renders?

State is managed within a component and can trigger re-renders when updated, while props are passed from parent to child and can also cause re-renders if they change.