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POJavascript global variable not being set from ajax call
 

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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/8187201/return-value-from-inside-of-ajax-function">Return Value from inside of $.ajax() function</a> </p> </blockquote> <p>I'm working on a CakePHP app that makes use of widespread AJAX calls to controllers. I'm stuck with one particular AJAX call in which I'm trying to assign the response from the controller to a JS global variable. Here is the code: </p> <pre class="lang-js prettyprint-override"><code>window.errors = ""; function setErrors(err) { window.errors = err; } function ajaxCall(u, t, d, dt) { var type = typeof t !== 'undefined' ? t : "post"; var dataType = typeof dt !== 'undefined' ? dt : "json"; var success = false; var err = ""; $.ajax({url: url, data: "data=" + d, type: type, dataType: dataType, success: function(d){ if(d.hasOwnProperty('success') === false) { //json response for(var i in d) { //fetch validation errors from object for(var j in i) { if(typeof d[i][j] === "undefined") { continue; } err += d[i][j] + "&lt;br/&gt;"; } } console.log(err); //&lt;=== displays correct value setErrors(err); //&lt;=== but somehow this seems to be failing?? } else { if(d.success === "1") { success = true; } } } }); return success; //&lt;=== I suspect this might be the culprit } </code></pre> <p>And this is how ajaxCall() is used:</p> <pre class="lang-js prettyprint-override"><code>function register() { var data = {}; var $inputs = $("#regForm :input"); $inputs.each(function(){ data[this.name] = $(this).val(); }); data = {"User" : data }; //CakePHP compatible object data = JSON.stringify(data); //Here's the AJAX call if(ajaxCall('https://localhost/users/add', 'post', data, 'json')) { alert("Registered!"); } else { alert(window.errors); // &lt;=== empty string console.log("window.errors is: " + window.errors); // &lt;=== empty string } } </code></pre> <p>But on the Chrome JS console, <code>window.errors</code> returns the correct value (non-empty, validation error string).</p> <p>I found a <a href="https://stackoverflow.com/questions/8960803/javascript-global-variable-not-in-scope-after-being-defined-in-callback">similar question</a> that possibly might be addressing my issue (the <code>return success</code> immediately following the <code>$.ajax()</code> is being executed before the <code>success:</code> callback). How can I fix this without drastically changing the code (also, I don't want to make this a synchronous call)?</p>
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