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https://issues.apache.org/jira/browse/WICKET-4894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13506450#comment-13506450
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Jonas Pohlandt edited comment on WICKET-4894 at 11/29/12 1:15 PM:
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Hi Martin, 

thanks for the quick reply and the solution. It took me a while to figure out 
the cause of this (and might take other people a while as well), so I suppose a 
warning when using the response.renderCSSReference overload with the 
"condition" parameter during an ajax request would be very helpful. Do you 
accept patches or pull requests on GitHub?

Another thing: is getSession().getClientInfo() going to work during an ajax 
request if called for the first time in the lifetime of the session?

Cheers
Jonas
                
      was (Author: pohlandt):
    Hi Martin, 

thanks for the quick reply and the solution. It took me a while to figure out 
the cause of this (and might take other people a while as well), so I suppose a 
warning when using the response.renderCSSReference overload with the 
"condition" parameter during an ajax request would be very helpful. Do you 
accept patches or pull requests on GitHub?

Cheers
Jonas
                  
> Internet Explorer fails fails to properly include conditional stylesheet 
> links added via AjaxRequestTarget
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: WICKET-4894
>                 URL: https://issues.apache.org/jira/browse/WICKET-4894
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket
>    Affects Versions: 1.5.4
>            Reporter: Jonas Pohlandt
>            Priority: Minor
>         Attachments: quickstart.zip
>
>
> CSS references added like this
>   @Override
>   public void renderHead( IHeaderResponse response ) {
>     super.renderHead( response );
>     response.renderCSSReference( 
>         new PackageResourceReference( getClass(), "TestLabel.css" ));
>     response.renderCSSReference( 
>         new PackageResourceReference( getClass(), "TestLabel-conditional.css" 
> ), null, null, "gte IE 8" );
>   }
> will not be taken into account by Internet Explorer (tested with 8 and 9) at 
> when rendering the document.
> I stepped though wicket-ajax.js and saw that the function added in 
> Wicket.Head.Contributor.processComment will actually be executed and a new 
> child node will be appended to the head node of the document. Unfortunately 
> it seems IE disregards conditional comments added in this way.
> I encountered this using Wicket 1.5.4.
> I'll upload a quickstart.

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