Lazy Loading Guide for Web Development 🚀

Lazy loading is a technique to defer loading non-critical resources (like images, scripts, or components) until they're needed, improving performance and user experience. Here's how to implement it effectively:

🧠 What is Lazy Loading?

Lazy loading loads assets on-demand rather than all at once.

• Images 📷: Load only when they enter the viewport
• Scripts 📜: Execute only when required
• Components 🧱: Render when interacted with

Use <img loading="lazy"> for native support in modern browsers.
For custom implementations, use JavaScript libraries like Intersection Observer API 📊.

🛠️ Implementation Methods

1. Images

   <img src="https://cloud-image.ullrai.com/q/Lazy_Loading_Images/" alt="Lazy Loading Images" loading="lazy">
   

   

   Lazy Loading Images

2. Scripts

   <script type="module" src="/en/tutorials/dynamic-imports"></script>
   

   Use dynamic imports for modular code 🔍.

3. Components (React/Vue)

   // React example
   const LazyComponent = React.lazy(() => import('./LazyComponent'));
   

   

   React_Lazy_Component

✅ Best Practices

• Prioritize critical rendering path resources ✅
• Use loading="lazy" for images and iframes 📱
• Combine with preloading for key assets 📥
• Test with tools like Lighthouse 📈

📚 Related Resources

• Optimization Strategies for performance
• Web Performance Fundamentals guide
• Lazy Loading in Angular (if using Angular)

Add images strategically to enhance visual clarity without overwhelming the user. Always ensure your lazy loading implementation aligns with accessibility standards 🧹.