With thousands of posts, virtualization is mandatory.
Problem: Rendering , posts creates ,+ DOM nodes. Memory bloats, scrolling stutters.
Solution: Render only visible posts plus buffer.
Implementation:
- Calculate visible range based on scroll position
- Render only those posts
- Use absolute positioning within scroll container
- Recalculate on scroll
Challenge: Variable height posts. Measure heights dynamically or estimate based on content type.
Libraries: react-window, react-virtualized, TanStack Virtual.