Expert Answer • 2 min read

Should I lazy load images below the fold?

As an e-commerce store owner, I'm trying to optimize my website's performance and user experience. I've heard about lazy loading images, but I'm unsure about its implementation, benefits, and potential drawbacks. I want to understand when and how to use lazy loading effectively, especially for product pages with multiple images. What are the best practices for implementing lazy loading, and how can it impact my site's speed and conversion rates?
Muhammed Tüfekyapan

Muhammed Tüfekyapan

Founder & CEO

2 min

TL;DR - Quick Answer

Lazy loading images below the fold improves page load speed, reduces initial bandwidth usage, and enhances user experience. Implement it using native browser attributes or JavaScript libraries, focusing on images not immediately visible in the viewport.

Complete Expert Analysis

Comprehensive Guide to Lazy Loading Images

Lazy loading is a critical performance optimization technique that can significantly improve your website's speed and user experience. Here's a deep dive into when, why, and how to implement it effectively.

What is Lazy Loading?

Lazy loading is a strategy that defers loading of non-critical resources (like images) until they are about to enter the viewport. Instead of loading all images when the page first loads, only images currently visible are loaded immediately, while others are loaded as the user scrolls.

Benefits of Lazy Loading

Performance Advantages

  • Faster initial page load times
  • Reduced bandwidth consumption
  • Lower server load
  • Improved mobile performance

User Experience Benefits

  • Faster perceived page load
  • Smoother scrolling experience
  • Reduced data usage for mobile users

Implementation Methods

1. Native Browser Attribute

<img src='product.jpg' loading='lazy' alt='Product Image'>

Modern browsers support the native 'loading' attribute, making implementation straightforward.

2. JavaScript Libraries

  • Intersection Observer API
  • lazysizes.js
  • Native lazy loading polyfills

Best Practices

  • 1.
    Placeholder Strategy: Use low-resolution placeholder images or color blocks to maintain layout stability
  • 2.
    Above the Fold: Always load critical images immediately
  • 3.
    Performance Testing: Use tools like Lighthouse to measure impact
  • 4.
    Fallback Support: Ensure functionality for browsers without lazy loading support

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Growth Suite's advanced performance optimization features complement lazy loading strategies. By analyzing visitor behavior and engagement, the platform helps you prioritize which images to load first, ensuring a seamless user experience while maintaining lightning-fast page speeds. The app's real-time performance tracking allows you to fine-tune your lazy loading implementation for maximum conversion potential.

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Muhammed Tüfekyapan

Muhammed Tüfekyapan

Founder & CEO of Growth Suite

With over a decade of experience in e-commerce optimization, Muhammed founded Growth Suite to help Shopify merchants maximize their conversion rates through intelligent behavior tracking and personalized offers. His expertise in growth strategies and conversion optimization has helped thousands of online stores increase their revenue.

E-commerce Expert Shopify Partner Growth Strategist

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