Module:Check for unknown parameters/doc

This is the documentation page for Module:Check for unknown parameters

Lua error in Module:Effective_protection_level at line 64: attempt to index field 'TitleBlacklist' (a nil value).

This module is rated as ready for general use. It has reached a mature state, is considered relatively stable and bug-free, and may be used wherever appropriate. It can be mentioned on help pages and other Wikipedia resources as an option for new users. To minimise server load and avoid disruptive output, improvements should be developed through sandbox testing rather than repeated trial-and-error editing.

Lua error in Module:Effective_protection_level at line 64: attempt to index field 'TitleBlacklist' (a nil value).

-->

File:Cascade-protection-shackle.svg

This module can only be edited by administrators because it is transcluded onto one or more cascade-protected pages.

File:Lua-Logo.svg

This module depends on the following other modules:

Module:If preview

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.

Usage

From a template

To sort entries into a tracking category by parameter, use:

{{#invoke:Check for unknown parameters|check|unknown=[[Category:Some tracking category|_VALUE_]]|arg1|arg2|arg3|argN}}

To sort the entries into a tracking category by parameter with a preview error message, use:

{{#invoke:Check for unknown parameters|check|unknown=[[Category:Some tracking category|_VALUE_]]|preview=unknown parameter "_VALUE_"|arg1|arg2|...|argN}}

For an explicit red error message, use:

{{#invoke:Check for unknown parameters|check|unknown=<span class="error">Sorry, I don't recognize _VALUE_</span>|arg1|arg2|...|argN}}

To use Lua patterns, use:

{{#invoke:Check for unknown parameters|check|unknown=[[Category:Some tracking category|_VALUE_]]|preview=unknown parameter "_VALUE_"|arg1|arg2|...|argN|regexp1=header[%d]+|regexp2=date[1-9]}}

From a module

To call from a module, use: <syntaxhighlight lang="lua"> local checkForUnknownParameters = require("Module:Check for unknown parameters") local result = checkForUnknownParameters._check(validArgs, args) </syntaxhighlight>

Where the first set of args are the module args below and the second set of args are the parameters that are checked.

Parameters

arg1, arg2, ..., argN, are the known parameters.
Unnamed (positional) parameters can be added too: |1|2|arg1|arg2|....
Lua patterns (similar to regular expressions) usage with parameters is also supported (such as: |regexp1=header[%d]+, |regexp2=date[1-9], |regexp3=data[%d]+[abc]?). This is useful when there are many known parameters which use a systematic pattern.
|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.
|preview= – the text to be displayed when in preview mode and an unknown parameter is used.
The _VALUE_ 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.
|ignoreblank=1 – by default, the module makes no distinction between a defined-but-blank parameter and a non-blank parameter. That is, both unlisted |foo=x and |foo= are reported. To only track non-blank parameters use |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.
|showblankpositional=1 – by default, the module ignores blank positional parameters. That is, an unlisted |2= is ignored. To include blank positional parameters in the tracking use |showblankpositional=1.
|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 {{#invoke:Infobox mapframe|auto}} and {{#invoke:Infobox mapframe|autocaption}} are in the template calling Check for unknown. Do NOT use if using {{Infobox mapframe}} as not all parameters are included when calling the template.

Example

Call from within Lua code

See the end of Module:Rugby box for a simple example or Module:Infobox3cols or Module:Flag for more complicated examples.