Spinners and loaders have traditionally been the way to tell users that content is going to take a while to load. While this approach is great, it’s quickly becoming obsolete in modern development. Skeleton screens are becoming the perfect replacement for traditional loaders because they focus on progress rather than wait times, hence reducing loading-time frustration. In this article, we won’t be going through the basics of CSS React or JavaScript syntax, so you don’t have to be an expert in either of these languages to follow along.

https://www.smashingmagazine.com/2020/04/skeleton-screens-react/