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https://issues.apache.org/jira/browse/WICKET-5104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13625340#comment-13625340
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Martin Grigorov commented on WICKET-5104:
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I cannot reproduce the problem with the attached quickstart.
The Label is set invisible in the panel constructor thus the Ajax timer
behavior is disabled and its #renderHead() is not called at all, so it doesn't
contribute the JS which should lead to this error.
What do I miss ?
> AjaxSelfUpdatingTimerBehavior in hidden component in ModalWindow causes Ajax
> Response Error
> -------------------------------------------------------------------------------------------
>
> Key: WICKET-5104
> URL: https://issues.apache.org/jira/browse/WICKET-5104
> Project: Wicket
> Issue Type: Bug
> Affects Versions: 6.3.0, 6.6.0
> Reporter: Marios Skounakis
> Assignee: Martin Grigorov
> Attachments: 5104.zip, fix-WICKET-5104.patch
>
>
> I have a ModalWindow which shows a panel with a hidden label with an
> AjaxSelfUpdatingTimerBehavior. When the modal window is shown, the following
> error occurs in the Wicket Ajax Debug console:
> ERROR: Wicket.Ajax.Call.processEvaluation: Exception evaluating javascript:
> TypeError: Cannot read property 'label5' of undefined, text:
> (function(){clearTimeout(Wicket.TimerHandles['label5']); delete
> Wicket.TimerHandles['label5'];})();
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