[udbhavs]

Interesting, I did not know it predated p5. That explains some of the inconsistencies and weird restrictions - I remember it only allowing specific syntax for things like declaring functions

[tomjuggler]

processing.js is unfortunately abandoned - which is a great pity since P5, it's successor, has some fundamental changes from the original Processing syntax.

Used to be you could copy and paste code that would run on desktop (Processing), browser (processing.js) and mobile (Processing for Android) and it would just work.

I do understand why P5 is important, though, with the popularity of JavaScript.