Lazy loading improves initial load time. Here's how to implement it effectively.
React.lazy and Suspense
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Named Exports
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Route-Based Code Splitting
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Preloading Components
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Error Boundaries
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Lazy Loading Images
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Component-Level Code Splitting
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Progressive Loading
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Bundle Analysis
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Best Practices
When to Lazy Load:
✓ Routes/pages
✓ Modals and dialogs
✓ Below-the-fold content
✓ Heavy third-party libraries
✓ Features behind feature flags
Optimization:
✓ Preload on hover/focus
✓ Use meaningful loading states
✓ Implement error boundaries
✓ Analyze bundle size
UX:
✓ Show skeleton loaders
✓ Avoid layout shift
✓ Preload likely next routes
✓ Progressive enhancement
Conclusion
Lazy loading reduces initial bundle size and improves load times. Use React.lazy for components, route-based splitting for pages, and Intersection Observer for images. Combine with preloading strategies and meaningful loading states for the best user experience.