jquery - e.which: Non numeric comparison -

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After

I have a legacy jQuery method that starts like this: 

  $ (function () {$ (Document) .keypress (function (e) {if ($ (document.activeElement) .is ('body')) {if (e.which == 48) {//  < / Pre> 
 I want to clear the code to clean it.  
 How can I check that the user has pressed the '0' key?  
 If the code works, it might be without magic number, but you want:, or you  if (e.which == unkown_method ('0')) {...   Solution   
 I can now use this solution with the help of "Archer" using the code>  
 I:  
  var key = String.fromCharCode (e.which); if (key == "0") {...} else if (key == "5") {. ..}    
 
 
 If you are asking if I think you are asking Then it should help ...  
  if (String.fromCharCode (e.which) == "0") {etc ..   
  Edit  This next bit is actually not relevant after y is relevant Supports jQuery standardized, so it always uses  which , but I will leave it for reference.  
 
 Also, keep in mind that different browsers are slightly different event types, so you may have to include it.  
  var key = String.fromCharCode (E.keyCode? E.keycode: e.which); If (key == "0") {etc.}   
 This is a normal bit of code that I've made a goal for ever, and to be honest, I do not remember what to do, but some use  keycode  And some use  which is  in both events including

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