🚀 React Performance & Patterns

Master React.memo, code splitting, HOC, render props, error boundaries, and Server Components

React.memo, optimization, code splitting, HOC, render props, and patterns

What is React.memo and when should you use it?

Medium

React.memo is a higher-order component that memoizes functional components, preventing unnecessary re-renders when props haven't changed.

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What is React Suspense and how do you implement code splitting?

Hard

Suspense lets components wait for something before rendering. Combined with React.lazy(), it enables code splitting to reduce initial bundle size.

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What are React Server Components and how do they differ from Client Components?

Hard

React Server Components (RSC) render on the server and send HTML to the client with zero JavaScript. They can directly access databases and reduce client bundle size.

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Explain React Error Boundaries and error handling strategies

Medium

Error Boundaries are React components that catch JavaScript errors in their child component tree, log errors, and display fallback UI instead of crashing the entire app.

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What are Higher-Order Components (HOC) and render props patterns?

Hard

HOCs and render props are patterns for code reuse in React. HOCs wrap components to add functionality, while render props share code via a function prop.

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How do you optimize React application performance?

Hard

React performance optimization involves reducing unnecessary renders, optimizing bundle size, and improving perceived performance through various techniques.

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How do you implement infinite scrolling in React?

Medium

Infinite scrolling loads more content as the user scrolls near the bottom. It can be implemented using Intersection Observer or scroll event listeners.

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