lazy-loading

Implement lazy loading for images in React by configuring an Intersection Observer to detect viewport visibility and defer asset downloads until visible. This defers non-critical resource loading, reducing initial page load times and saving bandwidth.

Reduce initial JavaScript bundle size in Next.js by applying code splitting through dynamic component imports and route-based loading. This defers heavy UI component execution until required, significantly improving frontend performance and perceived load times.

Build an infinite scroll list by integrating Intersection Observer patterns to trigger efficient data fetching as users scroll. This ensures complex UI components and long feeds load dynamically without overwhelming initial page resources.

Lazy loading works with skeleton placeholders by rendering temporary UI structures while dynamic imports and deferred assets load. This combination maintains visual stability during component loading and improves perceived web performance for heavy media.

Avoid dynamic imports for component loading when dealing with above-the-fold UI elements critical to initial render. Deferring these critical components harms perceived load times, whereas lazy loading should target below-the-fold content and heavy media.