Module:Ifexist

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This module implements {{If-exist}}, visit the template for documentation.

Usage

{{#invoke:Ifexist|main|[page name]|[then this]|[else this]}}

The above documentation is transcluded from Module:Ifexist/doc. (edit | history)
Editors can experiment in this module's sandbox (edit | diff) and testcases (create) pages.
Subpages of this module.

-- This module implements {{If-exist}}
 -- optional if template {{If}} seems difficult to use
local p = {}

function p.main(frame)
 title = frame.args[1] or '' -- PAGENAME
 thenthis = frame.args[2] --THEN RETURN THIS
 elsethis = frame.args[3] --ELSE THIS
 if mw.title.new(title).exists == true then
  return thenthis
 else
  return elsethis
-- if title exists then return this, if title doesn't exist then this
   end
 if not title then
  return error('Error at [[Template:If-exist]]: No page title found')
 end
end
return p