Image Optimization Test Page
This page demonstrates the image optimization features implemented:
- ✅ Lazy loading with Intersection Observer
- ✅ Progressive blur-to-clear loading effect
- ✅ Loading animations and placeholders
- ✅ Error handling with fallback images
- ✅ Responsive image sizing
- ✅ Performance optimizations (fetchpriority, decoding)
Implementation Details
1. Lazy Loading
All images now use the Intersection Observer API to load only when they're about to enter the viewport. This significantly reduces initial page load time.
2. Loading States
Images show a shimmer effect while loading, providing visual feedback to users.
3. Error Handling
Failed images display a placeholder SVG with an error message.
4. Performance Features
loading="lazy"
attribute for native browser lazy loadingdecoding="async"
for non-blocking image decodingfetchpriority
hints for above-the-fold images- Responsive
sizes
attributes based on context
5. CSS Enhancements
Added smooth transitions, loading animations, and error states in the stylesheet.
6. Optional: Image Optimization Script
Created scripts/optimize-images.py
that can generate multiple sizes and WebP versions of images for better performance.
Usage
The optimization is automatic for all images on the site. For best results:
- Use descriptive alt text for all images
- Consider running the optimization script for large images
- Use appropriate image formats (WebP for photos, SVG for graphics)
Performance Impact
These optimizations should significantly improve:
- Initial page load time
- Time to interactive (TTI)
- Cumulative Layout Shift (CLS)
- Overall user experience on slower connections