Which type of framework is Neon.js and Pj5 ?

Answer 1

Pj5...I think It's p5.js

p5.js is a JavaScript library that starts with the original goal of Processing, to make coding accessible for artists, designers, educators, and beginners, and reinterprets this for today's web. Using the original metaphor of a software sketchbook, p5.js has a full setof drawing functionality.

https://p5js.org/learn/

Answer 2

Neon.js

Neon (Ne) is a javascript Class system designed to wrap up object oriented logic around Javascript objects (which are not truly OO), and to establish a common base language for developers using such classes.

https://neonjs.com/