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| {{Used in system}}
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| {{Module rating|g}}
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| {{cascade-protected template|page=module}}
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| {{Lua|Module:If preview|noprotcat=yes}}
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| '''Module:Check for unknown parameters''' is used to check for uses of unknown parameters in a template or module. It may be appended to a template at the end or called directly from a module.
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| == Usage ==
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| === From a template ===
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| To sort entries into a tracking category by parameter, use:
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| * {{mlx|Check for unknown parameters|check|unknown{{=}}{{elc|Category:Some tracking category|_VALUE_}}|arg1|arg2|arg3|argN}}
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| To sort the entries into a tracking category by parameter with a preview error message, use:
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| * {{mlx|Check for unknown parameters|check|unknown{{=}}{{elc|Category:Some tracking category|_VALUE_}}|preview{{=}}unknown parameter "_VALUE_"|arg1|arg2|...|argN}}
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| For an explicit red error message, use:
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| * {{mlx|Check for unknown parameters|check|unknown{{=}}{{tag|span|params=class{{=}}"error"|content=Sorry, I don't recognize _VALUE_}}|arg1|arg2|...|argN}}
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| To use Lua patterns, use:
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| * {{mlx|Check for unknown parameters|check|unknown{{=}}{{elc|Category:Some tracking category|_VALUE_}}|preview{{=}}unknown parameter "_VALUE_"|arg1|arg2|...|argN|regexp1{{=}}header[%d]+|regexp2{{=}}date[1-9]}}
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| ===From a module===
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| To call from a module, use:
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| <syntaxhighlight lang="lua">
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| local checkForUnknownParameters = require("Module:Check for unknown parameters")
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| local result = checkForUnknownParameters._check(validArgs, args)
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| </syntaxhighlight>
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| Where the first set of args are the module args below and the second set of args are the parameters that are checked.
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| == Parameters ==
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| * <code>arg1</code>, <code>arg2</code>, ..., <code>argN</code>, are the known parameters.
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| * Unnamed (positional) parameters can be added too: <code>|1|2|arg1|arg2|...</code>.
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| * [[:mw:Extension:Scribunto/Lua reference manual#Patterns|Lua patterns]] (similar to [[regular expression]]s) usage with parameters is also supported (such as: {{para|regexp1|header[%d]+}}, {{para|regexp2|date[1-9]}}, {{para|regexp3|data[%d]+[abc]?}}). This is useful when there are many known parameters which use a systematic pattern.
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| * {{para|unknown}} – what happens when an unknown parameter is used. Typically use either a tracking category to place pages that use unknown parameters, or an error.
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| * {{para|preview}} – the text to be displayed when in preview mode and an unknown parameter is used.
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| * The <code>_VALUE_</code> keyword, if used, will be changed to the name of the parameter. This is useful for either sorting the entries in a tracking category, or for provide more explicit information.
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| * {{para|ignoreblank|1}} – by default, the module makes no distinction between a defined-but-blank parameter and a non-blank parameter. That is, both unlisted {{Para|foo|x}} and {{Para|foo}} are reported. To only track non-blank parameters use {{para|ignoreblank|1}}. If you clean your arguments with [[Module:Arguments]] and call this module afterwards, you need not use this parameter as that module ignores blank arguments by default.
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| * {{para|showblankpositional|1}} – by default, the module ignores blank positional parameters. That is, an unlisted {{para|2}} is ignored. To {{em|include}} blank positional parameters in the tracking use {{para|showblankpositional|1}}.
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| * {{para|mapframe_args}} – When this is set to a non-null value, the various [[Module:Infobox mapframe]] parameters will be automatically included in the list of valid parameters. This eliminates the need to manually add all 20+ params. '''NOTE''' this should only be used when {{mlx|Infobox mapframe|autoWithCation}} is in the template calling Check for unknown. Do NOT use if using {{tl|Infobox mapframe}} as not all parameters are included when calling the template.
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| == Example ==
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| <syntaxhighlight lang="wikitext">
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| {{Infobox
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| | above = {{{name|}}}
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| | label1 = Height
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| | data1 = {{{height|}}}
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| | label2 = Weight
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| | data2 = {{{weight|}}}
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| | label3 = Website
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| | data3 = {{{website|}}}
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| }}<!--
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| end infobox, start tracking
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| -->{{#invoke:Check for unknown parameters|check
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| | unknown = {{Main other|[[Category:Some tracking category|_VALUE_]]}}
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| | preview = unknown parameter "_VALUE_" | height | name | website | weight
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| }}
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| </syntaxhighlight>
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| ==Call from within Lua code==
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| See the end of [[Module:Rugby box]] for a simple example or [[Module:Infobox3cols]] or [[Module:Flag]] for more complicated examples.
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| ==See also==
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| * {{Clc|Unknown parameters}} (category page can have header {{tl|Unknown parameters category}})
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| * [[Template:Checks for unknown parameters]] – adds documentation to templates using this module
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| * [[Module:Check for deprecated parameters]] – similar module that checks for deprecated parameters
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| * [[Module:Check for conflicting parameters]] – module that checks for conflicting parameters
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| * [[Module:TemplatePar]] – similar function (originally from dewiki)
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| * [[Template:Parameters]] and [[Module:Parameters]] – generates a list of parameter names for a given template
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| * [[Project:TemplateData]] based template parameter validation
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| * [[Module:Parameter validation]] checks a lot more
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| == User scripts ==
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| * [[User:Bamyers99/TemplateParametersTool]] - A tool for checking usage of template parameters
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| * [[User:Zackmann08/scripts/AddCheckForUnknownParameters]] and [[User:Frietjes/addcheckforunknownparameters.js]], scripts for to quickly and easily generate wikitext for <code><nowiki>{{#invoke:Check for unknown parameters|check}}</nowiki></code> with the parameters in the template
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| <includeonly>{{Sandbox other||
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| <!-- Categories go here and interwikis go in Wikidata. -->
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| [[Category:Modules that add a tracking category]]
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| [[Category:Template metamodules]]
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| }}</includeonly><noinclude>
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| [[Category:Module documentation pages]]
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| </noinclude>
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