vanilla-lazyload
LazyLoad is a lightweight (2.4 kB) and flexible script that speeds up your web application by deferring the loading of your below-the-fold images, videos and iframes to when they will enter the viewport. It's written in plain "vanilla" JavaScript, it leve
srcset
Parse and stringify the HTML `<img>` srcset attribute
eleventy-plugin-images-responsiver
Global solution for responsive images in Eleventy, allowing authors to use Markdown syntax for image and yet get responsive images in generated HTML.