Design NewsFeed System

Scalable Infinite Scroll Feed System

Design a highly performant infinite scroll feed similar to modern social media platforms (e.g., Facebook, LinkedIn). The system must handle an unbounded number of items while maintaining a 60fps scroll rate. Key areas of focus include DOM virtualization strategies, efficient data fetching using Intersection Observer, memory management to prevent browser crashes, scroll position restoration, and handling variable-height content dynamically. Explain your approach to state normalization and how you ensure accessibility in a feed that constantly updates.
ReactTypeScriptIntersection Observer APITanStack QueryVirtualizationResizeObserverZustandTailwind CSS
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Real-time Infinite Timeline Design

Design the frontend architecture for a high-performance, real-time social media timeline similar to Twitter. Focus on how you would handle thousands of items in an infinite scroll without degrading browser performance, your strategy for integrating real-time updates without disrupting the user's reading flow, and how you would implement optimistic UI for high-frequency interactions like likes and retweets. Address data fetching, state management, and the rendering lifecycle in detail.
ReactTanStack QuerySSEIndexedDBTailwind CSSVirtualization
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Scalable Social Media Feed Design

Design a high-performance, infinite-scrolling social media feed similar to Twitter. Focus on solving the challenges of DOM node bloat, maintaining 60fps scroll performance with rich media (images/video), implementing optimistic UI for user engagements (likes/shares), and handling real-time data synchronization without disrupting the user's scroll position. Discuss your approach to data fetching, virtualization, and state management for a seamless cross-platform experience.
ReactTanStack QueryZustandTailwind CSSTypeScriptVirtualizationSSRIndexedDB
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Design NewsFeed System

Design a high-performance, scalable NewsFeed application similar to Facebook or LinkedIn. The system must support infinite scrolling of heterogeneous content (text, images, video), handle real-time interactions like 'likes' and 'comments' with zero perceived latency, and ensure layout stability (CLS). Focus on component architecture for virtualization, state management strategies for paginated data, and strategies for efficient media rendering on mobile-first web platforms.
ReactTanStack QueryZustandTailwind CSSVirtualizationTypeScriptOptimistic UI
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