View source for Template:If in category/doc

{{Documentation subpage}}
{{High-use}}
{{expensive}}
{{Lua|Module:If in category}}
This template checks if a page is in a given category. The syntax is:
<syntaxhighlight lang=wikitext>{{If in category|category name|output if the page is in the category|output if the page is NOT in the category|page=page name to test}}</syntaxhighlight>

==Usage notes==
*If no {{para|page}} parameter is supplied, it defaults to the current page
*The category name parameter treats {{kbd|Foo}} and {{kbd|Category:Foo}} as equivalent
*If neither output parameter is specified, it outputs {{samp|yes}} if true and the empty string if false

==Examples==
{{a note}} This page is in [[:Category:X1]].

*{{Demo inline|<nowiki>{{If in category|page=Amastra subsoror|Extinct gastropods|Dead as the dodo|Perhaps it's still alive}}</nowiki>}}
*{{Demo inline|<nowiki>{{If in category|page=Amastra subsoror|Category:Extinct gastropods|Dead as the dodo|Perhaps it's still alive}}</nowiki>}}
*{{Demo inline|<nowiki>{{If in category|page=Amastra subsoror|Extinct gastropods}}</nowiki>}}
*{{Demo inline|<nowiki>{{If in category|X1}}</nowiki>}}
*{{Demo inline|<nowiki>{{If in category|X1||no}}</nowiki>}}
*{{Demo inline|<nowiki>{{If in category|X2}}</nowiki>}}

==TemplateData==
{{TemplateData header}}
<templatedata>
{
	"params": {
		"1": {
			"label": "Category",
			"description": "Category being checked to see if the page is in it; \"Category:\" prefix is optional",
			"type": "wiki-page-name",
			"required": true,
			"example": "Category:X1 "
		},
		"2": {
			"label": "If yes",
			"description": "Output if the page is in the category. If neither \"If yes\" nor \"If no\" are set, defaults to \"yes\". ",
			"type": "content",
			"suggested": true
		},
		"3": {
			"label": "If no",
			"description": "Output if the page is not in the category",
			"type": "content",
			"suggested": true
		},
		"page": {
			"label": "Page",
			"description": "Page being checked. Defaults to the current page.",
			"type": "wiki-page-name",
			"default": "FULLPAGENAME"
		}
	},
	"description": "Checks whether a page is in a category, and returns different output based on the answer.",
	"paramOrder": [
		"1",
		"2",
		"3",
		"page"
	],
	"format": "inline"
}
</templatedata>

<!-- For the examples to work, [[Category:X1]] needs to be outside the includeonly -->
[[Category:X1]]
<includeonly>{{sandbox other||
<!-- Categories below this line -->
[[Category:Wikipedia categorization]]
[[Category:If-then-else templates]]
}}</includeonly>