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https://issues.apache.org/jira/browse/WICKET-6890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17815936#comment-17815936
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Martin Tzvetanov Grigorov edited comment on WICKET-6890 at 2/9/24 7:33 AM:
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I believe the change is worth it! 
I didn't keep a track of the reports that the debug HTML elements break the UI 
but there were several of them during the years!
Feel free to provide a PR with improvements (e.g. the enum based approach)! 
I'll be OK the old way to be the default!


was (Author: mgrigorov):
I believe the change is worth it! 
I didn't keep a track of the reports that the debug HTML elements break the UI 
but there were several of them during the years!
Feel free to provide a PR with improvements (e.g. the enum based approach)!

> Render debug setting 'outputMarkupContainerClassName` as an attribute
> ---------------------------------------------------------------------
>
>                 Key: WICKET-6890
>                 URL: https://issues.apache.org/jira/browse/WICKET-6890
>             Project: Wicket
>          Issue Type: Improvement
>          Components: wicket-core
>            Reporter: Martin Tzvetanov Grigorov
>            Assignee: Martin Tzvetanov Grigorov
>            Priority: Major
>             Fix For: 10.0.0-M1
>
>
> As discussed at [https://markmail.org/message/uoxxlnbz56ex7vuk] when 
> org.apache.wicket.settings.DebugSettings#isOutputMarkupContainerClassName() 
> returns true then the MarkupContainer class name should be rendered as an 
> attribute of the component tag instead of as an HTML comment because an HTML 
> comment may break a CSS rule, e.g. by appearing between two sibling HTML 
> elements
> {code:java}
> p + p {color: red;} {code}
>  
> The CSS rule above will change the text color of any paragraph that follows 
> another paragraph. But if an HTML comment appears between them then the rule 
> won't apply.



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