Passing ajax call to variable ( jquery )

Question

Is there any way I can run this code with async:false? I notice the jQuery manual specifies that it must be true, when passing the call return to a variable, but that is painful considering the method is meant to be generic.

ajaxCall.classFunction = function( $class, $function, $params){

//Ensure no errors occured
$params = typeof($params) != 'undefined' ? $params : false;

//Ajax Call for data
var $r =$.ajax({
    type:   'POST',
    url:    'json.php?c='+$class+'&func='+$function,
    data:   $params,
    timeout:5000,
    async:false,
}).responseText;
return $r;

what is it that you're trying to do here? are you trying to POST the function to the PHP page, or do you want to call the function after POSTing? — Dave Thieben
– Dave Thieben, Commented Sep 28, 2010 at 15:16
You can set ajax calls to be synchronous by default via jQuery's $.ajaxSetup()-method. This is a bad idea in general, though. — jwueller
– jwueller, Commented Sep 28, 2010 at 15:17
@dave a js function which posts class/function/arguments to the server, which then executes said class/function with said arguements. — Alex
– Alex, Commented Sep 28, 2010 at 20:27
yes, take a look at the documentation, about halfway down is an example that uses a success handler: api.jquery.com/jQuery.ajax — Dave Thieben
– Dave Thieben, Commented Sep 28, 2010 at 20:35

Jakub Konecki · Accepted Answer · 2010-09-28 15:16:02Z

1

No, you will have to specify success callback. With async set to true your outer method is not blocked and returns immediately without waiting for the actual response for your ajax call.

answered Sep 28, 2010 at 15:16

Jakub Konecki

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3 Comments

Dave Thieben Over a year ago

did you mean: With async set to true your outer method is not blocked and returns immediately.

Alex Over a year ago

So what your saying is that it should be possible to add a success handler which can then assign the output to a variable( or etc )?

Jakub Konecki Over a year ago

Yes. Inside callback you can reference a variable that is declared outside it (you might want to read about closures - en.wikipedia.org/wiki/Closure_(computer_science)). But your ajax call has to by synchronous.

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