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Editorial Team
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Asked: 2026-05-27T12:27:14+00:00

I am having a simple issues with this example and getting the a is

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I am having a simple issues with this example and getting the “a is null” in the Firefox error console. No alert shows. If I change from a DOM element to a object it works? 

<!DOCTYPE html>
 <script src="http://code.jquery.com/jquery-latest.js"></script>
 <script>
    $(document).ready(function() {

    $('<div>').attr('id', 'test').appendTo('#ii').text('dfdfd');
    $('#test').data({'rr': 'data', 'tt': 55});
    alert($.param($('#test').data()));
   });
 </script>
    <html>
     <head>

    </head>
   <body>
       <div id="ii"></div>

   </body>
 </html>
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1 Answer

  1. Editorial Team

    It looks like you meant to get the data from #test rather than #ii:

    $('<div>').attr('id', 'test').appendTo('#ii').text('some text');
$('#test').data({'ob1': 'some', 'ob2': 55});
alert($.param($('#test').data()));

    Example

    If this is not working it is likely that an element with the id #ii does not exist.

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