aFarkas/lazysizes

lazysizes is a fast (jank-free), SEO-friendly and self-initializing lazyloader for images (including responsive images picture/srcset), iframes, scripts/widgets and much more. It also prioritizes resources by differentiating between crucial in view and near view elements to make perceived performance even faster. It may become also your number one tool to integrate responsive images. It can automatically calculate the sizes attribute for your responsive...