MediaWiki: How can I use the output of {{Special:Editcount/User}} in #expr?

Question

I want to use the output of {{Special:Editcount/User}} in #expr to calculate something. But of course the output is handled as a string, even if I split it into its figures with #sub. So how can I make it being recognized as int? Any idea?

Answer 1

Try {{formatnum|{{Special:Editcount/<user>}}|R}} (docs).

Answer 2

You cannot do that, because embedded special pages such as {{Special:Editcount}} are filled out at load time, after the Wikitext has already been parsed. In order to parse such content you will need runtime JavaScript.