The left portion of the page is the menu area where ... B shows one of the examples — Delayed Mouse Tracking — which uses the Processing.js library. Additional HTML and CSS has been added.

I’ll explain the CSS specificity hierarchy in a way that hopefully makes it easier to understand and then present several examples. CSS specificity hierarchy having the least specificity value.

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 ...

This definition explains the meaning of CSS (cascading style sheets) and how using them with HTML pages is a user interface (UI) development best practice that complies with the separation of concerns ...