Module:For params/doc

{{#invoke:For params|main}} implements a loop over valid numbered parameters. The loop body that receives the parameters is either defined as wikitext using |1= or as a template using |call=.

Syntax

• Wikitext: {{#invoke:For params|main|<nowiki>wikitext<nowiki>|config parameters}}
• Template: {{#invoke:For params|main|call=template|config parameters}}

Body

The wikitext where parameters are substituted into is defined either as wikitext or a template. Parameters are passed with their number removed, i.e. |prefixisuffix= becomes |prefixsuffix= and |extraiextrasuffix= becomes |extraextrasuffix=. The parameter {{{i}}} is the current index, and {{{1}}} is the current unnamed parameter (if applicable).

Body definition parameters

• |1= - Wikitext to process using the parameters each iteration. Enclosed in <nowiki>...</nowiki>.
• |call= - Template to call. Overrides |1=. As with transclusion, if the passed title does have a namespace prefix, it will default to the Template: namespace.

Input

The parameters passed to the body are either prefix parameters, extra parameters, or fixed parameters.

Parameter definitions parameters

• |prefixn= - A parameter prefix to process. All registered parameter prefixes will be checked to determine if a iteration number is present in the provided arguments. |prefix1= defaults to processing unnamed parameters.
• |suffixn= - Suffix for the corresponding |prefixn= if applicable. For example, |prefix1=person will look for parameters of the form personx (where x is a number), and |prefix1=person |suffix1=_name will look for parameters of the form personx_name.
• |extran= - An extra parameter prefix to process. Unlike prefixes, these will not be checked to determine if a number is present in the provided arguments. For example, if item is a prefix and style is an extra, then style2 will be ignored unless item2 is also defined.
• |extrasuffixn= - Suffix for the corresponding |extran= if applicable. For example, |extra1=age will look for parameters of the form agex (where x is a number), and |extra1=person |suffix1=_age will look for parameters of the form personx_age.
• |fixedn= - A fixed parameter to use the value of as an argument for all iterations. Useful for configuration parameters that apply to all iterations.

Behaviour parameters

• |sparse= - Set to yes to support parameter lists with gaps. Defaults to no.
• |optnum= - Whether or not to support passing the first parameter without a number, i.e. allow |prefixsuffix= rather than |prefix1suffix= for the first parameter. Defaults to yes.
• |start= - Begin iterating from this number. Parameters before this number are ignored.
• |noindex= - Don't pass {{{i}}}, the current index, to the body. Defaults to no, i.e. do pass {{{i}}}.

Concatenation

Before the final output is produced, optional concatenation separators can be added in-between iterations.

Separator parameters

• |sep= / |2= - Separator to add between outputs. To preserve leading and trailing whitespace, an unnamed parameter can be used instead (|2=, unless |call= is being used, then |1=).
• |conj= - Special separator to use before the final output. Outer spaces can be added with {{sp}} or  .

Examples

See also: Module talk:For params/testcases

Wkitext

Template wikitext:

{{#invoke:For params|main|<nowiki>{{{first}}} {{{last}}}</nowiki>|, |prefix1=last|prefix2=first}}

Template call:

{{__TEMPLATE__
|last1=Doe |first1=Jane
|last2=Smith |first2=John
}}

Output: Jane Doe, John Smith

When |optnum=no is not set, the first parameter set does not require a number suffix:

Template call:

{{__TEMPLATE__
|last=Doe |first=Jane
|last2=Smith |first2=John
|last3=White |first3=Walter
}}

Output: Jane Doe, John Smith, Walter White

If the first parameter set has a number suffix, parameters without a suffix are overridden:

Template call:

{{__TEMPLATE__
|last=Doe |first=Jane
|last1=Smith |first1=John
}}

Output: John Smith

If parameters specified some (but not all) prefixn are missing in a group, they will be missing in the call of the wikitext:

Template call:

{{__TEMPLATE__
|last1=Doe
|first2=John
}}

Output: {{{first}}} Doe, John {{{last}}}

Parameter suffixes

Template wikitext:

{{#invoke:For params|main|<nowiki>{{{person_name}}}, aged {{{person_age|?}}}</nowiki>|; |prefix=person|suffix=_name|extra=person|extrasuffix=age}}.

Template call:

{{__TEMPLATE__
|person_name=John |person_age=40
|person2_name=Jane |person2_age=45
|person3_name=Bill
}}

Output: John, aged 40; Jane, aged 45; Bill, aged ?.

Complex wikitext

Template wikitext:

{{#invoke:For params|main
|<nowiki>* ''{{{item}}}'' {{#if:{{{date|{{{alias|}}}}}}
 | @ Date: {{#if:{{Yesno|{{{red_dates|}}}}}
  | {{Red|{{{date|{{{alias|}}}}}}}}
  | {{{date|{{{alias|}}}}}}
 }}
}}</nowiki>|
|prefix1=item |extra1=date |extra2=alias |fixed1=bold_dates
}}

Template call:

{{__TEMPLATE__ |item1=Foo |item2=Bar |date2=2026-08-27 |item3=Baz |alias3=2026-08-30 |red_dates=1}}

Output:

• Foo
• Bar @ Date: 2026-08-27
• Baz @ Date: 2026-08-30

Secondary template

Template wikitext:

{{#invoke:For params|main |call=Cite web |prefix1=last |prefix2=first |prefix3=title |prefix4=url |noindex=y |sep={{sp}}}}

Template call:

{{__TEMPLATE__
|last=Doe |first=Jane |title=A website |url=https://www.example.com
|last2=Smith |first2=John |title2=A better website |url2=https://www.example.com/better
|last3=White |first3=Walter |title3=The best website |url3=https://www.example.com/best
}}

Output: Doe, Jane. "A website". Smith, John. "A better website". White, Walter. "The best website".