jsFiddle lets developers play with the three core elements of Web development. Check out this powerful application for rapid prototyping and testing.

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.

Sure, HTML and CSS are the foundations of web development, offering the basic structure and formatting that make web pages and apps what they are today. But without the pre-eminent programming ...