jquery - cannot callback data from $.post -

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i'm cannot return data $.post function() pls help

refer url : data post request

test = {          getdata : function (callback){            $.post("getdata.php",{data: data},function(data){                    callback(data);        }                   }    }               var data = test.getdata(callback);                    console.log(data);              

** typeerror : callback not function

thank you

the callback think not keyword or default argument. reference of function executed after ajax call performed. haven't declared what's callback. have like:

function callback (data) {   // data } 

you can define callback way:

var callback = function (data) {   // data }