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https://issues.apache.org/jira/browse/WICKET-3603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017178#comment-13017178
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Bertrand Guay-Paquet commented on WICKET-3603:
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Please see attached DataTableToolbars.patch for a proposed patch to fix the
occurance of <thead> and <tfoot>.
There is still a problem when the DataTable has no records however. In that
case, we have an empty <tbody> which is not valid html. <tbody> cannot be
simply removed because a non-empty table body is required.
I wasn't sure what to do in that case so I left it out of the first patch.
> DataTable row groups are present in markup even when they contain no rows.
> --------------------------------------------------------------------------
>
> Key: WICKET-3603
> URL: https://issues.apache.org/jira/browse/WICKET-3603
> Project: Wicket
> Issue Type: Bug
> Components: wicket-extensions
> Affects Versions: 1.5-RC3
> Reporter: Bertrand Guay-Paquet
> Labels: datatable
> Attachments: DataTableToolbars.patch
>
>
> As per the HTML spec :
> "When present, each THEAD, TFOOT, and TBODY contains a row group. Each row
> group must contain at least one row, defined by the TR element."
> There is no check in place to remove the row group tags from the output if
> they don't contain any row.
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