Not Planned [XF1] Add showcase class to the body element

Is there any you can add a showcase tag to the body element? This way I can do this

Code:

body.showcase .previewTooltip {
        width: 150px;
}

Thank you!

 

I could but then it will apply to everywhere. I only want the tag to show up in the showcase section.

 

This is what I get when I search it.


The only reason it showed up in "nflj_showcase_layout_list_view_item" is because I put this there.

Code:

<style>.xenPreviewTooltip{width:auto}.previewTooltip{width:150px}</style>

I prefer not to do it like that, which why I asked for the showcase class.