Error: 'data(...)' is null or not an object

Hi tward,

Thanks for taking the time to contribute to the jQuery UI project. I'm seeing the error you're describing, but there's a lot going on in your test case so it's ascertain exactly what's happening. Would you mind reducing your test case to the absolute minimum amount of code needed that still shows the error?

The less JavaScript the better. Thanks!

Replying to [comment:1 tj.vantoll]:

Hi tward, Thanks for taking the time to contribute to the jQuery UI project. I'm seeing the error you're describing, but there's a lot going on in your test case so it's ascertain exactly what's happening. Would you mind reducing your test case to the absolute minimum amount of code needed that still shows the error? The less JavaScript the better. Thanks!

I thought I had! I removed some more stuff that was not needed for the test case... Let me know if it is not enough.

Thanks.

Interestingly I no longer get an error in http://jsfiddle.net/tward/qV3hY/3/ but I do with http://jsfiddle.net/tward/qV3hY/2/. Are you seeing the same?

Replying to [comment:3 tj.vantoll]:

Interestingly I no longer get an error in http://jsfiddle.net/tward/qV3hY/3/ but I do with http://jsfiddle.net/tward/qV3hY/2/. Are you seeing the same?

That is odd, but yes I am seeing the same thing. After more fiddling with it, it appears to be the following code that causes the problem:

   try
      {
       var LocatorDiv = document.getElementById('LocatorDiv');
       LocatorDiv.className="LocatorDiv";
      }
 catch(err)
      {
      }    

The only thing that changed when this started happening was when I upgraded the UI to 1.10.3.

Replying to [comment:4 tward]:

Replying to [comment:3 tj.vantoll]: > Interestingly I no longer get an error in http://jsfiddle.net/tward/qV3hY/3/ but I do with http://jsfiddle.net/tward/qV3hY/2/. Are you seeing the same? That is odd, but yes I am seeing the same thing. After more fiddling with it, it appears to be the following code that causes the problem:

>    try
>       {
>        var LocatorDiv = document.getElementById('LocatorDiv');
>        LocatorDiv.className="LocatorDiv";
>       }
>  catch(err)
>       {
>       }    
> 

The only thing that changed when this started happening was when I upgraded the UI to 1.10.3.

I guess the LocatorDiv.className="LocatorDiv" is effectively removing "ui-dialog-content ui-widget-content" from the classNames, not sure why 1.10.3 has a problem with it, but I fixed it by not doing the above.

Guess it is not really a bug in jQuery UI, but a problem with what I was doing.

Ok. Internally the widget looks for those classes for determine whether clicks came from within the dialog.