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lazysizes - High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration

  •    Javascript

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 images, it allows you to share media queries for your media attributes with your CSS, helping to separate layout (CSS) from content/structure (HTML) and it makes integrating responsive images into any environment really simple. It also includes a set of optional plugins to further extend its functionality.

respimage - respimage is a responsive images polyfill, that loads your images fast and responsibly

  •    Javascript

#respimage respimage is a fast, lightweight and robust responsive images polyfill, that saves the users bandwidth by utilizing smart resource selection algorithm. It implements the srcset/sizes attributes as also the picture element. Unlike other responsive images polyfills respimage plays nicely with your graceful degradation / progressive enhancement and image SEO strategy. ##Download and Embed Simply download the respimage.min.js script and add it to your website or bundle it in your normal JS.