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Cèṭa'an:If then wikilink

Ḍâri Wikipèḍia bhâsa Madhurâ, lombhung pangataowan mardhika
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If the first unnamed parameter is not an empty string, the template returns it as a piped wiki-link using the |prefix= as a namespace or interwiki prefix. Otherwise it returns the second unnamed parameter.

This is only useful when the first parameter is a {{#invoke: }} of a Lua module that may return a value or nothing. Because it uses the {{#invoke: }} just once, it simplifies the coding of infoboxes and reduces the calls to a module.

The |after= parameter is emitted immediately after the wikilink. This is useful, e.g., for tracking categories.

The |linktext= parameter allows the link text of the wikilink to be overridden. Otherwise, it will be the same as the first positional argument.

Examples

[beccè' sombher]
  • {{If then wikilink |{{#invoke:WikidataIB |getSiteLink |wiki=enwikisource |qid=Q56862211}} | prefix=s:en:|after=!}} → [[s:en:Lua error in Modul:WikidataIB at line 94: attempt to call field 'loadI18n' (a nil value). |Lua error in Modul:WikidataIB at line 94: attempt to call field 'loadI18n' (a nil value).]]!
  • {{If then wikilink |{{#invoke:WikidataIB |getSiteLink |wiki=enwikisource |qid=Q56862211}} | prefix=s:en:|linktext=Wikisource}} → [[s:en:Lua error in Modul:WikidataIB at line 94: attempt to call field 'loadI18n' (a nil value). |Wikisource]]
TemplateStyles' src attribute must not be empty.