A Rube Goldberg Machine
Ada Rose Edwards takes a look at some of the newer browser APIs and how they fit together:
These new APIs are powerful individually but also they complement each other beautifully, CSS custom properties being the common thread which goes through them all as it is a low level change to CSS.
The post itself is a showcase to them.
Speaking of new browser APIs, that was a whole subject on ShopTalk a few weeks back.