Question

I have search through google with keyword handle javascript magic number but couldn’t find one.
In c# i would used constant defined number but i don’t know what to use in javascript

something like this

public class MagicNumberHelper
{
  const int optionA = 1;
  const int optionB = 2:
  const int optionC = 3
}

Answer 1

is it just a constant number that you can test for later
in that case

var MagicNumbers = {
 optionA: 1,
 optionB: 2,
 optionC: 3
};

and then later test for it like this

if(inputNr == MagicNumbers.optionA) {
  // your logic here
}