Cascading Style Sheets (CSS) first dropped in 1996 ... The issue is that there’s no way to leverage the shortcut property without also affecting the borders you don’t want to manipulate.

Now [Andy Green] has extended the possibilities with affordable silicon, by producing a proof-of-concept HTML + CSS renderer over h2 on ESP32 for libwebsockets. Surf the web on a microcontroller ...

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code right inside your browser. A quick tour ...