jquery ajax callback out of the function scope

Question

function checkauth(){
       jQuery.getJSON("/users/checkauthjson", null, function(xhr){
           if(xhr.success){ return true;}else{ return false;}
            });
   }

Obviously, that does not work, but it illustrates what i want to achieve. I want checkauth to return a value which is checked against an ajax server script.

How do i do this?

mamoo · Accepted Answer · 2010-04-22 15:24:22Z

1

getJson() is an asynchronous method by default, so you cannot rely on it without doing some adjustments. Use .ajax() function, setting async param to false, and then assign result to a var whose scope is in the checkAuth() function.

Something like this:

function ceckAuth() {
  var ret = false;
  $.ajax({
    url: '/users/checkauthjson',
    dataType: 'json',
    data: '',
    async: false,
    success: function(result) { ret = result.success; },
    error: ...
  });
  return ret;
}

answered Apr 22, 2010 at 15:24

mamoo

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1 Comment

Matt Over a year ago

Note that you page will be unresponsive whilst the AJAX request is in progress, because it's now synchronous.

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