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1 Answer

it is advised that you should not use, or attempt to not use global variables. They can cause problems that can be difficult to find.

The code below is a way that I use that gets around this (i pulled this from another website a while back but sadly I do not have that site for reference).

const myApp = {};
(function() {

put code here


This acts like a namespace that you would find in Java. It encapsulates everything so that nothing is actually added to the global namespace.

Also, there are several places where you have some serious if statements going on. You should try to refactor your code so that there are not so many embedded if statements. Try going with more function declarations or some other approach. This will help in the maintenance and upkeep of your code. And it will make it easier to read/understand.

Please understand your code is "clean" looking and obviously functional, just a couple things pointed out that I would have tried to do differently.