This JavaScript library improves website performance by loading images, iframes, and other media only when a user scrolls them into view. It is designed for developers building fast, modern websites who need to reduce initial page load times and bandwidth usage.

• Automatic lazy loading: It automatically detects and defers loading for images, iframes, and scripts, converting standard src attributes to data-src to prevent immediate downloads.
• Responsive image support: Works natively with srcset and the picture element, ensuring the correct image size is loaded for the user's device.
• Visual placeholders: Can generate low-resolution Blurhash placeholders, which display a blurry preview of an image while the full version loads, improving perceived performance.
• Prioritized loading: Differentiates between elements currently in the viewport and those about to enter it, loading critical content first for a smoother experience.
• SEO-friendly implementation: Maintains proper image attributes and supports fallbacks for users without JavaScript, helping with search engine indexing.