Dmitry Zlygin
Sep 9, 2018 · 1 min read

Great article, Mateusz. I would like only to recommend you to guide reader through building the code instead of explaining the entire solution.

It’s worth noting that lazy load improves perceived page performance, at the end page will still load all images (when user scrolls it down). Also think it’s useful to mention that polyfill can be added to support IntersectionObserver at least in Safari.