Template:See also if exists/doc

This is a documentation subpage for Template:See also if exists.
It contains usage information, categories and other content that is not part of the original template page.

This template uses Lua:

Module:See also if exists

Displays a "see also" link to one or more pages, followed by a line break, if the page exists. If none of the supplied pages exists, the template does nothing.

It allows the creation of links to pages which do not yet exist, but which will be displayed if and when the page is created. This is useful as a topic is being developed, because the editor does not have to guess whether a target page is likely to exist any time soon: the link can be created now, rather than having to edit the page again later.

Usage

Usual syntax: {{See also if exists | page}}; {{See also if exists | page1| page2| page3| ...}}

Parameters:

At least one page name

Examples

A page which does exist:
{{See also if exists|Poland}} →
A non-existent page:
{{See also if exists|1997 Presidential election in Planet Zxcvbmm}} →
A set of pages, some of which exist:
{{See also if exists | Argentina| | James Balfour (died 1845) | asdfghij2345 | Dinosaurs | poiytrewq6789 | zzzzzzzzy | Novels }} →

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Generic	{{Hatnote}} {{Selfref}} (for self-references)
For and about	{{For}} {{For2}} (for custom text) {{For multi}} (for multiple uses) {{About}} Variations: {{Other uses}} {{Other uses of}}
Other topics	{{Other people}} {{About other people}} (adds "about" description) {{Similar names}} {{Other places}} {{Other ships}} {{Other hurricanes}}
Redirect	{{Redirect}} {{Redirect2}} (for two redirects) {{Redirect-multi}} (for multiple redirects) {{Redirect-several}} (for several redirects, without listing each) {{Redirect-synonym}} {{Redirect-distinguish}} {{Technical reasons}}
Distinguish	{{Distinguish}} (supports custom text too) {{Redirect-distinguish}} {{Redirect-distinguish2}} (for custom text) {{Redirect-distinguish6}} {{About-distinguish}} {{About-distinguish2}} (for custom text)
For use in sections	{{Main}} {{Further}} {{Further2}} (for custom text) {{Further ill}} {{See also}} {{See also if exists}} {{For outline}}
Special	{{Broader}} {{See introduction}} {{See Wiktionary}} {{Transcluding article}} {{Transcluded section}}
Subject specific	{{Year dab}} {{Highway detail hatnote}} {{For LMST}} {{WikiIPA}} {{Other MeSH codes}}
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