Template:When in sandbox/doc
 | This is a documentation subpage for Template:When in sandbox. It contains usage information, categories, interlanguage links and other content that is not part of the original template page. |
- in
Returns "/sandbox" – or, if supplied, the first unnamed parameter ("return this" above) – if the template detects that the page where it is transcluded is a subpage named "sandbox" (i.e. a sandbox page); otherwise it returns nothingTemplate:Spndashor, if supplied, the second unnamed parameter ("else return this" above). It corresponds to {{When pagename is |/sandbox={{{return this|/sandbox}}} |other={{{else return this|}}}}}.
This can be useful to e.g. switch the version of a template used in its /doc[umentation] to the version in its sandbox (by replacing Template:Mono ... on the /doc page with Template:Mono ...) when that documentation is transcluded on the template's sandbox page.