Question

How to set global variable.

$(document).ready(function() {

      $("a.action").click(function(event) {
            var tempResponse = "";
            $.get("", function(response){
                tempResponse = response; 
            });
            alert("response " + tempResponse );
      }

       //todo use response to manipulate some data
});

I declared globa variable tempResponse. and I set in get call back function.

tempResponse = response; 

but while I try to alert the response no data displayed. I also try this solution. I change the variable declaration
become $.tempResponse and change the set script become $.tempResponse = response;

But it doesn’t work to.

Why this could be happened ?

Answer 1

Because you call the alert before the variable is actually set. Remember that you are performing an asynchronous query when you call $.get. Try this instead:

$(document).ready(function() {
    $.get('/somescript.cgi', function(response){
        alert('response ' + response);
    });
});