Jquery Error Elem Is Undefined
here for a quick overview of the site Help Center Detailed answers to any jquery nodename undefined questions you might have Meta Discuss the workings and policies typeerror: o.nodename is undefined of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up elem.nodeName returns undefined, bug in jQuery? up vote 1 down vote favorite Currently, I'm adapting a registration page to use Ajax/jQuery. Its in the simple stage, asking simply for a username and password. I want to use jQuery to tell the user if the current entry in the username textbox is invalid or has already been taken. If either conditional is met, the div namemsg will have text added to it and execute the fadeIn event. The page loads with he submit button disabled, and upon passing validation the button is enabled. To do this, I have the following ajax request to handle the username validation $("#username").keyup(function(){ //get current value thisVal = $(this).val(); //execute request to see if current val exists in database $.ajax({ type: "GET", url: "includes/phpscripts.php?action=checkUser", data: {username:thisVal}, success: function(data){ //if username is already taken, show warning and disable submit button if (data == 'true'){ $("#namemsg").text("Username is already taken"); $("#namemsg").fadeIn(100); $("#submit").attr('disabled', 'disabled'); } //otherwise, possible valid username else if (data == 'false'){ //check if username is of the proper length. If not, display //error and disable submit button if ($(this).val().length < 5){ $("#na
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up jQuery bug elem is undefined if ( elem.nodeName ) http://stackoverflow.com/questions/11036017/elem-nodename-returns-undefined-bug-in-jquery { up vote 2 down vote favorite You might saw my previous topic about jQuery upgrade. So finally we have upgraded the jQUery to 1.6.1 from 1.4.2 but we encountered the following issue: elem is undefined if ( elem.nodeName ) { So does anyone know if this issue of jQuery or is it our local bug? Has anyone else encountered the same problem. Any help will be http://stackoverflow.com/questions/9122043/jquery-bug-elem-is-undefined-if-elem-nodename appreciated. jquery share|improve this question edited Feb 3 '12 at 0:23 Daniel A. White 120k24234329 asked Feb 3 '12 at 0:21 Jackie Chan 1,23732051 have you tried to troubleshoot your code? –Daniel A. White Feb 3 '12 at 0:23 I'm interested how you chose 1.6.1, since 1.6.4 is the most recent of the 1.6 line. Does it work properly with 1.6.4? –Dave Methvin Feb 3 '12 at 3:01 It's a system designer chooses what to use instead of me, being developer :) –Jackie Chan Feb 3 '12 at 5:57 add a comment| 1 Answer 1 active oldest votes up vote -2 down vote That is actually not the proper way of getting an element. Although it works on some cases/browsers, that's not utilizing the power of jQuery actually at all. $("#elem") should be used instead so that jQuery can apply the applicable code to get the element. Also check if u accidentaly run the code before the element sets in DOM. share|improve this answer answered Feb 3 '12 at 0:28 Spiros Souliotis 1552 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up us
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings http://stackoverflow.com/questions/8817148/a-nodename-is-undefined-jquery-error and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs https://forum.jquery.com/topic/elem-nodename-is-undefined Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; is undefined it only takes a minute: Sign up a.nodeName is undefined Jquery error up vote 5 down vote favorite 2 a.nodeName is undefined I've looked this up but the explanations didn't seem at all clear to me. function deleteThisRow() { $(this).closest('tr').fadeOut(400, function(){ $(this).remove(); }); }
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