Template:When on basepage/doc - Revision history

Matt at 11:16, 14 April 2025

2025-04-14T11:16:46Z

← Older revision		Revision as of 07:16, 14 April 2025
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	This is the {{tl\|When on basepage}} meta-template. It helps other templates detect if they are on a '''basepage''' (i.e. a page whose name matches the pattern "''x'':''x''") '''subpage''' ("''x'':''x''/''x''") or '''subsubpage''' ("''x'':''x''/''x''/''x''").		This is the {{tl\|When on basepage}} meta-template. It helps other templates detect if they are on a '''basepage''' (i.e. a page whose name matches the pattern "''x'':''x''") '''subpage''' ("''x'':''x''/''x''") or '''subsubpage''' ("''x'':''x''/''x''/''x''").

	An alternative way to detect whether a page is a subpage is to combine the parser functions <code>#ifeq:</code> and <code>#titleparts</code>. See ~~[[#~~Alternatives for simpler text~~\|Alternatives for simpler text]]~~ below.		An alternative way to detect whether a page is a subpage is to combine the parser functions <code>#ifeq:</code> and <code>#titleparts</code>. See Alternatives for simpler text below.

	== Usage ==		== Usage ==
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	== Technical note ==		== Technical note ==

	This template detects subpages in all namespaces, including those without the ~~[[meta:Link#Subpage feature\|~~MediaWiki subpage feature]] enabled.		This template detects subpages in all namespaces, including those without the MediaWiki subpage feature enabled.

	== Alternatives for simpler text ==		== Alternatives for simpler text ==
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	:: <nowiki> \| {{template sandbox notice}}</nowiki>		:: <nowiki> \| {{template sandbox notice}}</nowiki>
	: <nowiki>}}</nowiki>		: <nowiki>}}</nowiki>
	That simple logic works because [[Template:Template sandbox notice]] also checks the page name for "/sandbox" before displaying the sandbox notice; otherwise, any other subpage would show no extra text. By avoiding a template, and using a single <code>#ifeq</code>, then the processing uses only +2 expansion depth levels, rather than +7 levels, and avoids "[[wp:exceeded template limits]]" inside a complex /doc page.		That simple logic works because Template:Template sandbox notice also checks the page name for "/sandbox" before displaying the sandbox notice; otherwise, any other subpage would show no extra text. By avoiding a template, and using a single <code>#ifeq</code>, then the processing uses only +2 expansion depth levels, rather than +7 levels, and avoids "wp:exceeded template limits" inside a complex /doc page.

	<includeonly>{{Sandbox other\|\|		<includeonly>{{Sandbox other\|\|

Matt at 09:47, 9 April 2025

2025-04-09T09:47:15Z

← Older revision		Revision as of 05:47, 9 April 2025
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	Regardless of where the above is placed, it will return: {{When on basepage\|(basepage result)\|(subpage result)\|page=User:Example/test}}<br/>(because "User:Example/test" is a subpage). The page doesn't have to exist.		Regardless of where the above is placed, it will return: {{When on basepage\|(basepage result)\|(subpage result)\|page=User:Example/test}}<br/>(because "User:Example/test" is a subpage). The page doesn't have to exist.

	If ''page'' is left empty ({{para\|page}}) or undefined, the page where the template is transcluded (i.e. ~~{{tld\|PAGENAME}}~~) is used.		If ''page'' is left empty ({{para\|page}}) or undefined, the page where the template is transcluded (i.e. ) is used.

	''page'' also accepts variables, e.g. {{nowrap\|{{tlf\|When on basepage \|(basepage result) \|(subpage result) \|page<nowiki>={{{page\|}}}</nowiki> }}}}		''page'' also accepts variables, e.g. {{nowrap\|{{tlf\|When on basepage \|(basepage result) \|(subpage result) \|page<nowiki>={{{page\|}}}</nowiki> }}}}
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	: <nowiki>}}</nowiki>		: <nowiki>}}</nowiki>
	That simple logic works because [[Template:Template sandbox notice]] also checks the page name for "/sandbox" before displaying the sandbox notice; otherwise, any other subpage would show no extra text. By avoiding a template, and using a single <code>#ifeq</code>, then the processing uses only +2 expansion depth levels, rather than +7 levels, and avoids "[[wp:exceeded template limits]]" inside a complex /doc page.		That simple logic works because [[Template:Template sandbox notice]] also checks the page name for "/sandbox" before displaying the sandbox notice; otherwise, any other subpage would show no extra text. By avoiding a template, and using a single <code>#ifeq</code>, then the processing uses only +2 expansion depth levels, rather than +7 levels, and avoids "[[wp:exceeded template limits]]" inside a complex /doc page.

	~~== See also ==~~
	* {{tlx\|Ns has subpages}}

	<includeonly>{{Sandbox other\|\|		<includeonly>{{Sandbox other\|\|

Matt at 08:33, 9 April 2025

2025-04-09T08:33:36Z

← Older revision		Revision as of 04:33, 9 April 2025
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	== See also ==		== See also ==
	* {{tlx\|Ns has subpages}}		* {{tlx\|Ns has subpages}}
	~~{{Namespace and pagename-detecting templates}}~~

	<includeonly>{{Sandbox other\|\|		<includeonly>{{Sandbox other\|\|

Matt at 21:24, 5 March 2025

2025-03-05T21:24:54Z

← Older revision		Revision as of 17:24, 5 March 2025
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			{{wikipedia\|page name}}
	{{Documentation subpage}}		{{Documentation subpage}}
	<!--Categories where indicated at the bottom of this page, please; interwikis at Wikidata (see [[Wikipedia:Wikidata]])-->		<!--Categories where indicated at the bottom of this page, please; interwikis at Wikidata (see [[Wikipedia:Wikidata]])-->

Matt: Protected "Template:When on basepage/doc": Initial wiki setup ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite))

2025-03-05T20:34:36Z

Protected "Template:When on basepage/doc": Initial wiki setup ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite))

← Older revision	Revision as of 16:34, 5 March 2025
(No difference)

Matt: Created page with "{{Documentation subpage}} This is the {{tl|When on basepage}} meta-template. It helps other templates detect if they are on a '''basepage''' (i.e. a page whose name matches the pattern "''x'':''x''") '''subpage''' ("''x'':''x''/''x''") or '''subsubpage''' ("''x'':''x''/''x''/''x''"). An alternative way to detect whether a page is a subpage is to com..."

2025-03-05T19:15:31Z

Created page with "{{Documentation subpage}}  This is the {{tl|When on basepage}} meta-template. It helps other templates detect if they are on a '''basepage''' (i.e. a page whose name matches the pattern "''x'':''x''") '''subpage''' ("''x'':''x''/''x''") or '''subsubpage''' ("''x'':''x''/''x''/''x''"). An alternative way to detect whether a page is a subpage is to com..."

New page

{{Documentation subpage}}


This is the {{tl|When on basepage}} meta-template. It helps other templates detect if they are on a '''basepage''' (i.e. a page whose name matches the pattern "''x'':''x''") '''subpage''' ("''x'':''x''/''x''") or '''subsubpage''' ("''x'':''x''/''x''/''x''").

An alternative way to detect whether a page is a subpage is to combine the parser functions <code>#ifeq:</code> and <code>#titleparts</code>. See [[#Alternatives for simpler text|Alternatives for simpler text]] below.

== Usage ==

: {{tlx|When on basepage |''result if on a basepage'' (|''result if on a subpage'') (|''result if on a subsubpage'') (|page{{=}}''pagename'')}}

For example, {{tlf|When on basepage |Basepage |Subpage}} on the page "User:Example" would return: {{When on basepage|Basepage|Subpage|page=User:Example}}<br/>whilst on "User:Example/page" (or "User:Example/page/page", "User:Example/page/page/page", etc.) it would return: {{When on basepage|Basepage|Subpage|page=User:Example/page}}

On a subsubpage such as "User:Example/page/page" (or "User:Example/page/page/page", etc.), {{nowrap|{{tlf|When on basepage |Basepage |Subpage |Subsubpage}}}} would return: {{When on basepage |Basepage |Subpage |Subsubpage |page=User:Example/page/page}}

Use an empty parameter to specify no action for a particular type of page. {{nowrap|{{tlf|When on basepage |Basepage | |Subsubpage}}}} on "User:Example/page", for example, would return nothing, but would return "Subsubpage" if on "User:Example/page/page", "User:Example/page/page/page", etc. (and "Basepage" if on "User:Example").

===Handling equals-signs ("=")===
Use numbered parameters if their values include equals-signs ("="), i.e.
: {{tlf|When on basepage |1{{=}}''basepage result'' (|2{{=}}''subpage result'') (|3{{=}}''subsubpage result'')}}

===''page'' parameter===
The ''page'' parameter is included for testing/demonstration. For example:
: {{tlf|When on basepage |(basepage result) |(subpage result) |page{{=}}User:Example/test}}
Regardless of where the above is placed, it will return: {{When on basepage|(basepage result)|(subpage result)|page=User:Example/test}}<br/>(because "User:Example/test" is a subpage). The page doesn't have to exist.

If ''page'' is left empty ({{para|page}}) or undefined, the page where the template is transcluded (i.e. {{tld|PAGENAME}}) is used.

''page'' also accepts variables, e.g. {{nowrap|{{tlf|When on basepage |(basepage result) |(subpage result) |page<nowiki>={{{page|}}}</nowiki> }}}}

== Technical note ==

This template detects subpages in all namespaces, including those without the [[meta:Link#Subpage feature|MediaWiki subpage feature]] enabled.

== Alternatives for simpler text ==

A subpage can be detected without using another template, by instead using the title-splitting parser function <code>#titleparts</code> with <code>#ifeq</code>:
<pre>
{{#ifeq:{{#titleparts:{{PAGENAME}}|1|1}}|{{PAGENAME}}
| [...code if on a basepage...]
| [...code if on a subpage...]
}}
</pre>
For example, many templates can check if the page is a /sandbox version, by the similar markup with <code>#ifeq</code> and <code>#titleparts</code>:
: <nowiki>{{#ifeq: {{#titleparts:{{PAGENAME}}|1|1}} | {{PAGENAME}}</nowiki>
:: <nowiki> | {{documentation}}</nowiki>
:: <nowiki> | {{template sandbox notice}}</nowiki>
: <nowiki>}}</nowiki>
That simple logic works because [[Template:Template sandbox notice]] also checks the page name for "/sandbox" before displaying the sandbox notice; otherwise, any other subpage would show no extra text. By avoiding a template, and using a single <code>#ifeq</code>, then the processing uses only +2 expansion depth levels, rather than +7 levels, and avoids "[[wp:exceeded template limits]]" inside a complex /doc page.

== See also ==
* {{tlx|Ns has subpages}}
{{Namespace and pagename-detecting templates}}

<includeonly>{{Sandbox other||

[[Category:Pagename manipulation templates]]
[[Category:Wikipedia metatemplates]]
}}</includeonly>