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POajax success callback executes out of expected order
 

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    <p>I have a function that validates some fields when a button is pressed. First one checks if the username and password are authentic or not. then if the password is appropriately secure. Then if it matches the confirm-password box. However, it seems that the ajax that check to see if the user is authentic does not complete before the alert in the first function pops up.</p> <pre><code>$(document).ready(function() { $('#submit_pw_ch').on('click', function(){ var alertString = "Please correct the following errors: \n" //current username and password are correct var vUsr = valUsr(); //new password is sufficiently secure var vPwd = valPwd(); //confirmation of new password is same as previous box var sPwd = samePwd(); console.log('valid user : ' + vUsr + ' valid password : ' + vPwd + ' same password : ' + sPwd); //append appropriate warnings to alert string if ( !vUsr ) { alertString += "-Your current username and password are invalid. \n"; } if ( !vPwd ) { alertString += "-The new password you have selected is not strong enough. \n"; } if ( !sPwd ) { alertString += "-The confirmation of your new password does not match the previous entry. \n"; } if ( !vUsr || !vPwd || !sPwd ) { alert(alertString); return false; } else { //change password } }); }); </code></pre> <p>So the line that checks for that is <code>var vUsr = valUsr();</code> which calls</p> <pre><code>function valUsr() { var un = $('#uNameInput').val(); var pw = $('#uPwdInput').val(); //return value var validUsr = false; $.ajax({ type: "post", url: "queries/confirm_user.php?&lt;?=time()?&gt;", data: "un=" + un + "&amp;pw=" + pw, dataType: "json", success: function (returnedData) { console.log(returnedData) if (data == 'true') { validUsr = true; } else { validUsr = false; } } }); return validUsr; } </code></pre> <p>Somehow though the alert is not waiting for the ajax to finish getting it's data. The <code>console.log(returnedData)</code> in the <code>valUsr()</code> function appears in the console after I've dismissed the alert box. Why is this happening? How can I prevent it? Thanks!</p>
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    1. CO`valUsr()` will **always** return `false`. Ajax request by default run *asynchronously*.
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    2. CO@jAndy I know you're right. Thank you. For some reason when I set async to false before, I swear it didn't work. But it does the trick now. Thanks much!
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