'jQuery UI dialog - check if exists by instance method

I'd like to use instance method for testing if jQuery UI Dialog widget has been initialized or not. Regarding to API, this is possible, but it doesn't work for me:

Uncaught Error: cannot call methods on dialog prior to initialization; attempted to call method 'instance'

demo: http://jsfiddle.net/mDbV7/

UPDATE:

This was a mistake in the documentation, instance method will be available from version 1.11.0, see this issue.

jquery-ui-dialog


Solution 1:[1]

It is also a good habit to empty and destroy dialogs once you're done using them. I usually use this code in the close event of each dialog

$("#myDialog").dialog({
    // other options
    close: function(event, ui) {
        $(this).empty().dialog('destroy');
    }
}

That'd be my advice, rather than asking every time if a dialog exists in an instance make sure that each dialog cleans up after itself.

Solution 2:[2]

You can use:

if($('#id').is(':ui-dialog')) {
}

or

    var obj = $('<div>test</div>').dialog();
    if (obj.is(':ui-dialog')) {
      alert('I\'m a dialog')
    }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>

Solution 3:[3]

If you are making that dialog from an existing id in your html code, like this example:

$('#main').dialog({});

Notice that dialog() adds the class ui-dialog in a <div> parent element generated for it to work. At the #main element, the classes added by dialog() are: ui-dialog-content and ui-widget-content (in jquery-ui-1.9.2). So, in this case, following the example from @jbabey, you can check the existing dialog doing:

if ($('#main').hasClass('ui-dialog-content')) {
    // do whatever
}

Solution 4:[4]

     if ($('#update').is(':data(dialog)')) 
     {
              //#update has dialog
     }
     else
     {
              //#update does't have dialog
     }

Solution 5:[5]

For jQuery UI - v1.10.3

if($( "#myDialog" ).is(':data(uiDialog)')){//is(':data(dialog)') does not work
    //Dialog exist
}

Solution 6:[6]

another way is

$('.element').is(':data(dialog)');

Solution 7:[7]

$("[aria-describedby="IDNAME"]").remove(); - if you want to remove same dialog, which makes as html code DATA

$("[aria-describedby="IDNAME"]") - element of Dialog with additional ID NAME. You can detect data by ($("[aria-describedby="IDNAME"]").lenght > 0) or remove all dialog with this ID for prevent duplicate window.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Tim
Solution 2
Solution 3 Tim
Solution 4 Mahesh Reddy
Solution 5 Awan
Solution 6 dmnc
Solution 7

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