Here in this wiki the SyntaxHighlight extension is at work. Usually one uses the <syntaxhighlight> tag to mark those parts which shall be highlighted. Pages like MediaWiki:Gadget-site.css are highlighted. But there I find no <syntaxhighlight> tag in the wiki code. Will this extension hightlight such css pages without the tag as well?
Topic on Extension talk:Highlightjs Integration/Flow
No. This extension only affects code contained within HTML/XML elements (tags) such as syntaxhighlight. To highlight without tags requires changing the content model of the page, such as with the SyntaxHighlightPages Extension. You can use both SyntaxHighlightPages and Highlightjs_Integration at the same time, but they use different highlighting libraries and styles (Pygments vs. HighlightJS). Nicole Sharp (talk) 13:51, 27 March 2021 (UTC)
I would really like to see the HighlightJS library and style options applied to page content models though like with SyntaxHighlightPages. Nicole Sharp (talk) 14:08, 27 March 2021 (UTC)