Lazy load images without JavaScript

I hate this type of article. The headline is "Lazy load images with zero Javascript", so I naturally expect to read about a technique which makes that possible.

First of all, the author shows two techniques _with_ JavaScript (by the way: please do not use screenshots of code instead of actual text snippets). Then he explains that Chrome 70 can natively lazy load images when enabling a hidden flag. How could that be helpful?

Good tip about lqip/sqip for image placeholders.