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Re: What's supposed to be the correct syntax to call function that has jQuery ajax within?

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On Tue, 13 Sep 2016 13:00:16 -0700 (PDT), justaguy wrote:
> Hi,
> 
> I attempted to call a function by assign it to a variable's value but it complained about "undefined", what is the correct way?  Thanks.
> 
> <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
> <script>
> 
> // ajax call for a server side script with State and County parameters
> function ckCounty(st,cunty) {
> 	$.ajax({
> 		url: 'whateverScript.file?state='+st+'&county='+cunty,
> 		success: function(rtn) {
> 			rtn = eval(rtn);
> 			if (rtn > 0) 
> 			{ 
> 				return 'green';		
> 			}	
> 		 // setTimeout(ckCounty, 2000);    
> 		}
> 	});
> }
> 
> var	Color = 'grey';
> Color = ckCounty('ga','TAYLOR');
> 
> console.log(Color);
> 
> </script>

You're assigning `Color` variable with the return value of `ckCounty()`
function. That function doesn't return any value, so its return value
defaults to `undefined`, which is correct.

If you want to assign the `Color` variable to the ajax result, assign it in
the ajax's `success` handler. e.g.

  rtn = eval(rtn);
  if (rtn > 0) 
  { 
    Color = 'green';
  } else
    Color = 'red';
  }

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Thread

What's supposed to be the correct syntax to call function that has jQuery ajax within? justaguy <lichunshen84@gmail.com> - 2016-09-13 13:00 -0700
  Re: What's supposed to be the correct syntax to call function that has jQuery ajax within? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-09-14 00:25 +0100
    Re: What's supposed to be the correct syntax to call function that has jQuery ajax within? justaguy <lichunshen84@gmail.com> - 2016-09-16 18:13 -0700
  Re: What's supposed to be the correct syntax to call function that has jQuery ajax within? JJ <jj4public@vfemail.net> - 2016-09-14 06:52 +0700
    Re: What's supposed to be the correct syntax to call function that has jQuery ajax within? justaguy <lichunshen84@gmail.com> - 2016-09-16 18:12 -0700

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