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Editorial Team
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Asked: 2026-05-18T02:10:46+00:00

as you see in the code below. I have a jQuery function called externally.

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as you see in the code below. I have a jQuery function called externally.

I don’t understand why I can’t get the class name, I get an alert with “undefined”, I was expecting “classifyClass” instead, can you help? Thank you.

<html>
<head>
    <meta charset="utf-8">
    <title>parent</title>
    <script src="./js/jquery-1.4.2.min.js"></script>
    <script>
            function classify() {
                //some jquery stuff here alredy, and it works...

                //now I want to get/set the parent class, but not working (getting an alert with written "undefined", why?
                var myclass = $(this).parent().attr('class');
                alert(myclass);
            }
    </script>
</head>
<body>

<div class="pos">
    <div class="classifyClass">
        <div style="width:50px;height:50px;background-color:red;" onclick="javascript:classify();return false;"></div>
        <div style="width:50px;height:50px;background-color:green;" onclick="javascript:classify();return false;"></div>
    </div>
</div>

<div id="feedback"></div>

</body>
</html>

P.s. I don’t want to use the jquery selector I need to call the function like that as I’m passing some asp.net parameters, I simplified here the example to focus on the main problem. Thank you.

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1 Answer

  1. Editorial Team

    In your current context this refers to the window object. You either need to pass this, like this:

    onclick="return classify(this);"

    With matching script:

    function classify(elem) {
  //some jquery stuff here alredy, and it works...
  var myclass = $(elem).parent().attr('class');
  alert(myclass);
  return false;
}

    Or (better), binding unobtrusively (using your current function, this will work), like this:

    $(".classifyClass > div").click(classify);
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