What causes a React component to re-render?
A React component re-renders when its state or props change. This can happen due to user interactions, API calls, or parent component updates.
Can you explain how to prevent unnecessary re-renders?
To prevent unnecessary re-renders, you can use React.memo for functional components, PureComponent for class components, and optimize state management.
What is the difference between state and props?
State is managed within the component and can change over time, while props are passed from parent to child components and are immutable.
How can I check if a component re-renders?
You can use the React Developer Tools to monitor component re-renders or implement console logs in the render method.
Are there any performance implications of re-rendering?
Yes, excessive re-rendering can lead to performance issues, especially in large applications. It's important to optimize rendering.
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