这是什么类型的CSS？

Question

I was looking at an old installation of mediawiki which is not rendering css properly the code in the Chrome Dev Tools is showing CSS like this

{{{border-width|1}}}px solid {{{titleborder|{{{border|#ababab}}}}}}

Not able to understand what is the pre-processor used and why its not working. Can someone hint to some direction.

Here in the image the span text is not rendered as a blue bar since The CSS breaks because of the template code. Not sure where to look for this CSS Template issue. Isnt much aware about the Media Wiki Architecture.

Answer 1

Most likely, this CSS is used inline in a template on your page.

{{{border-width|1}}} means “use the value of the parameter border-width, or 1 if none is given”. In this case, the parameters to the template are not expanded. There are a number of possible reasons, though until you show us the template code, or give us a link to the page, we can only guess:

1. Syntax errors in the template (like a missing bracket somewhere, or a stray <nowiki> tag)
2. A complex template chain passed the expansion depth limit.
3. Too many templates on one page (surpassing the post-expand include size)

You can check the category Category:Pages containing omitted template arguments to see if it is any of the latter, though I strongly suspect the first.

Edit: Also, before doing anything else, you can try to simply purge the page, to re-render it.

Edit2: Now that we have a screenshot, it looks like some wikicode that an extension could have thrown in there. Start by disabling all extensions, and, if that helps, enable them again one by one.