What code will be the most informative?

Question

JavaScript

Hello!
I am writing my bike - a js code compressor
I don’t know js myself very well
And therefore I ask knowledgeable people, please give an example of code where all js structures are used
Well, that is, loops, if's, functions, classes, methods, etc., etc. .d., etc.
The performance of the code is not important at all

Answer 1

world best compressor
see what it does and how it does it.
https://github.com/mishoo/UglifyJS2

Answer 2

There are no such examples. Do it yourself, take some textbook as a basis, like this: https://learn.javascript.ru/