https://en.wikipedia.org/wiki/Template:Signpost/item, if that's what you mean.
The JPxG person (who is not an employee of WMF for some reason; maybe they didn't apply?) recently put this in the testing version of the template:


{{#switch: {{{2}}}
  | 0 =        {{#switch: {{{1}}}
                 | 3 = <div><span>''{{{4}}}'' — ''[[#{{{4}}}|{{{5}}}]]''</span></div>
                 }}
  | #default = {{#switch: {{{1}}}{{#expr:{{{2}}} mod 2}}
                 | 10  =
                 | 11  =
                 | 20  =
                 | 21  =
                 | 30  = <div><span>{{{4}}}</span><br>[[#{{{4}}}|{{{5}}}]]</div>
                 | 31  = <div><span>{{{4}}}</span><br>[[#{{{4}}}|{{{5}}}]]</div>
                 | 40  =
                 | 41  =
                 }}
}}

maybe he was rejected because of his awful date format?

Anyway, the testing version has now been automatically protected from editing because JPxG also tested his kewl new testing version by using it in an old 2010 issue, which resulted in 827 page updates

onlinepersona

•

For all the good wikipedia does, it has the worst markup language I've seen.

CC BY-NC-SA 4.0

Aatube

•

I mean, it's very OK and even charming when you have https://www.mediawiki.org/wiki/Extension:ParserFunctions enabled. You can perfectly read the testing version of the code, no?

{{#switch: {{{2}}} | 0 = {{#switch: {{{1}}} | 3 = <div><span>''{{{4}}}'' — ''[[#{{{4}}}|{{{5}}}]]''</span></div> }} | #default = {{#switch: {{{1}}}{{#expr:{{{2}}} mod 2}} | 10 = | 11 = | 20 = | 21 = | 30 = <div><span>{{{4}}}</span><br>[[#{{{4}}}|{{{5}}}]]</div> | 31 = <div><span>{{{4}}}</span><br>[[#{{{4}}}|{{{5}}}]]</div> | 40 = | 41 = }} }}