Lazyloading is a good way to improve image performance, if you have a lot of images on the page that fall below the fold. By only loading images and other large assets when they're about to be displayed, you can greatly reduce the initial page weight and get the page on-screen for your users more quickly. For simple pages, or where SEO is important, you’ll probably want to leave loading up to the browser, but if your site is a good candidate or is already using this method, read on.
This post will cover how to use imgix with the major responsive design patterns and lazysizes, a popular responsive design library that provides fast lazyloading and lots of other features.You can get lazysizes and its installation instructions at Github.
