Lazy Loading in React Applications

Lazy loading improves initial load time. Here's how to implement it effectively.

Component-Level Code Splitting#

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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

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.

Lazy Loading in React Applications

React.lazy and Suspense#

Named Exports#

Route-Based Code Splitting#

Preloading Components#

Error Boundaries#

Lazy Loading Images#

Component-Level Code Splitting#

Progressive Loading#

Bundle Analysis#

Best Practices#

Conclusion#

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