Pomoc:Szablony

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Jeśli masz standardowy do umieszczenia na kilku stronach, na pomoc przychodzą szablony MediaWiki. Inaczej niż rozszerzenia i pliki multimedialne, nie głównego repozytorium szablonów. Szablony mogą być napisane lub, by oszczędzić powtarzania pracy, eksportowane z innej wiki np. Wikipedii, i wtedy importowane do docelowej wiki. Templates can be newly written or, to save duplicating work already done, exported from another wiki e.g. Wikipedia, and then imported into the target wiki.

Basic usage

Szablony to standardowe strony wiki, których zawartość została zaprojektowana, by być transkludowana (osadzona) w innych stronach. Szablony podążają za konwencją, że ich nazwa jest poprzedzona "Szablon:", przypisującym je do tej przestrzeni nazw; poza tym, można utworzyć je jak każdą inną stronę wiki.

To transclude a template, you used double open & close curly brackets {{template name}}.

Najprostsze użycie szablonów wygląda następująco. Jeśli stworzy się stronę nazwaną "Szablon:Witaj" z zawartością:

Cześć! Witaj na wiki.

a następnie umieści kod:

{{Witaj}}

w każdej innej stronie, gdy będzie wyświetlana, będzie się pojawiał tekst "Cześć! Witaj na wiki." zamiast {{Welcome}}. Zawartość szablonu jest "transkludowana" w inną stronę, tj. jest zintegrowana ze stroną.

Można następnie umieścić {{Witaj}} gdziekolwiek w jakiejkolwiek stronie, gdzie chce się pozdrowić kogoś. Załóżmy, że jest używany na 100 stronach. Jeśli zmieni się zawartość szablonu na:

Hej! Witaj na tej wspaniałej wiki.

i odwiedzi którąkolwiek spośród tych 100 stron, gdzie został użyty ten szablon, pokaże się nowy tekst zamiast oryginalnego. Tym sposobem została zmieniona zawartość 100 stron bez edytowania ich, bo szablon jest "transkludowany" w te strony.

To podstawowy mechanizm. Jest kilka dodatkowych funkcji transkludowania, które wzbogacają ten mechanizm i czynią szablony bardzo użytecznymi.

Ways to invoke a template

Szablony mogą być używane w innych stronach na następujące sposoby:

• {{Nazwa}} — jak opisano powyżej, te odniesienie jest dynamicznie zamieniane bieżącą zawartością [[Szablon:Nazwa]] w momencie, gdy strona z odniesieniem do szablonu jest ładowana. Odniesienie jest niezmieniane w źródle strony.

Because the template call remains in the pages's source, any subsequent change to Template:Name will be seen on the page containing the template call. Also, the page will be listed among those that "link to" the template.

• {{subst:Nazwa}} — gdy te odniesienie do szablonu jest użyte, jest na stałe zamienione na zawartość [[Szablon:Nazwa]], gdy strona z odniesieniem jest zapisana: kopia zawartości [[Szablon:Nazwa]] zastępuje odniesienie do szablonu. Zawartość jest wtedy częścią włączającej strony i może być normalnie edytowana, osobno od oryginału. Zauważ: późniejsze zmiany źródła szblonu nie zmieniają takiej kopii na stronie z odniesieniem.

That is, a copy of the contents of Template:Name will be substituted for the template call. No link is maintained between the page and the template, so each can be edited further without affecting the other. In effect, there is little difference between substituting the content in this way and simply typing it into the page's source "manually". See Pomoc:Podstawianie for more information.

• {{sefesubst:Nazwa}} — to zostało wprowadzone, by pozwolić na podstawienie, które nie niszczy; więcej informacji w w:en:Help:Substitution#The safesubst: modifier (ang.).

See Pomoc:Podstawianie for more information.

• {{msgnw:Name}} — This displays the template content as raw wiki syntax (the way ‎<nowiki> does) when the page containing it is viewed.

For example, {{msgnw:Template:Thankyou}} displays:

<noinclude> <languages/> </noinclude> '''Podziękowanie dla Ciebie...''' za {{{reason|{{{1}}}}}}. uściski, {{{signature|{{{2}}}}}} <noinclude> [[Category:Template examples{{#translation:}}|{{PAGENAME}}]] </noinclude>.

In fact, an ordinary wiki page can also be used as a template, simply by specifying the namespace it resides in, so:

• {{Template:Pagename}} zawiera [[Template:Pagename]]

• {{Talk:Pagename}} zawiera [[Talk:Pagename]]

• {{:Pagename}} zawiera [[Pagename]]

• • {{subst::Pagename}} zastępuje się zawartością [[Pagename]]

Jeśli taka przestrzeń nazw nie istnieje, zakłada się, że pełny tytuł jest szablonem:

• {{Foo:Bar}} zawiera [[Template:Foo:Bar]]

Regardless of what syntax is used, the name of the template can be relative to the current page For example, if {{/bar}} is called on page foo, it will transclude the page foo/bar.

It can also be generated dynamically. For example, {{ {{foo}} }} calls Template:foo and interprets the result as the name of another template to call.

Parametry

Aby wzbogacić mechanizm transkluzji, MediaWiki umożliwia przekazywanie parametrów do szablonu po jego transkluzji. Parametry pozwalają szablonowi generować różne treści lub mieć różne zachowania.

Załóżmy, że chcesz wstawić małą notkę z podziękowaniami na talk page innych użytkowników, na przykład:

Podziękowanie dla Ciebie... za za cały twój wysiłek. uściski, Ja

Podziękowania będą miały powód (w tym przypadku „za cały twój wysiłek”) i podpis („Ja”). Twoim celem jest, aby każdy użytkownik mógł podziękować innemu użytkownikowi, z dowolnego powodu.

Aby notatka wyglądała podobnie wszędzie tam, gdzie jest używana, możesz na przykład zdefiniować szablon o nazwie Template:Thankyou . Chociaż notatka powinna wyglądać podobnie, gdy użytkownik dziękuje innemu użytkownikowi, jej konkretna treść (tj. powód i podpis) będzie inna. Z tego powodu należy przekazać je jako parametry. Jeśli pominiemy pozostałe elementy do sformatowania pudełka i umieszczenia obrazu, podstawowa zawartość szablonu będzie następująca:

'''Małe podziękowania...'''
Za {{{1}}}.
uściski, {{{2}}}

Zwróć uwagę na użycie {{{1}}} i {{{2}}}. W ten sposób można zidentyfikować w szablonach parametry, które zostaną przekazane podczas korzystania z szablonu. Zauważ, że w szablonie każdy parametr jest otoczony „trzema” nawiasami klamrowymi: {{{ }}}. Różni się to od normalnego użycia nazwy szablonu.

Używając szablonu na stronie, wypełniasz wartości parametrów oddzielone znakiem „pipe” (|). MediaWiki umożliwia przekazywanie parametrów do szablonu na trzy sposoby: anonimowo, numerowane i nazwane.

Anonimowe parametry

To pass in anonymous parameters, list the values of those parameters sequentially:

{{Thankyou|za cały twój wysiłek|Ja}}

In this case, the {{Thankyou}} template receives parameters {{{1}}}=all your effort and {{{2}}}=Me, producing:

Podziękowanie dla Ciebie... za za cały twój wysiłek. uściski, Ja

The order in which anonymous parameters are passed in is crucial to its behavior. Reversing the order of the parameters, like so:

{{Thankyou|Ja|za cały twój wysiłek}}

dałoby taki wynik:

Podziękowanie dla Ciebie... za Ja. uściski, za cały twój wysiłek

Identifying parameters by order (with {{{1}}}, etc.) works only with anonymous parameters. Any parameters identified by name, as shown below, will not be accessible to the template using ordinal numbers.

If an equal sign appears inside the argument to an anonymous template parameter, that parameter may be misinterpreted as a named parameter (which is explained below in this document) treating the text before the equal sign as the parameter name and the text after it as the argument value. This is a common problem when you need to include an external link, or an HTML element with attributes (see zadanie T16235). The workaround is to use named parameters instead, or even numbered parameters as explained in the following section.

Numerowane parametry

To pass in parameters by number, identify each parameter when passing it:

{{Thankyou|2=Me|1=your friendship}}

This time, template {{Thankyou}} receives parameters {{{1}}}=your friendship and {{{2}}}=Me, though they have been supplied in inverse order, and produces:

Podziękowanie dla Ciebie... za your friendship. uściski, Me

This may also be useful when any of the numbered parameters contains an "=" sign.

Examples:

{{Thankyou|1=adding “=”|2=Me}}

produces:

Podziękowanie dla Ciebie... za adding “=”. uściski, Me

Uwaga:

This also requires numbering each other parameter.

Nazwane parametry

The third way of passing parameters is by name instead of numbers. In this case, the template contents would be changed to:

'''A little thank you...'''
for {{{reason}}}.
hugs, {{{signature}}}

Within the template, we use {{{reason}}} and {{{signature}}} to identify each parameter, instead of a number. To pass these parameters by name, identify each parameter when passing it:

{{Thankyou|signature=Me|reason=being who you are}}

In this case, template {{Thankyou}} receives parameters {{{reason}}}=being who you are and {{{signature}}}=Me and produces:

Podziękowanie dla Ciebie... za being who you are. uściski, Me

Named parameters are case-sensitive, so:

{{Thankyou|signature=Me|Reason=being who you are|reason=being case-sensitive}}

produces:

Podziękowanie dla Ciebie... za being case-sensitive. uściski, Me

The advantage of using named parameters in your template, besides also being flexible in the order parameters can be passed, is that it makes the template code much easier to understand if there are many parameters.

Spaces and newlines are automatically stripped from the start and end of named parameter names and values, but are preserved in unnamed parameters.

Mixing named and unnamed parameters

If the template supports it, both kinds of parameters can be used in one call.

For example, {{Thankyou|supporting both parameter types|signature=Me}} results in:

Podziękowanie dla Ciebie... za supporting both parameter types. uściski, Me

Be careful when doing this, because it can result in conterintuitive results as unnamed parameter counts are based only on the unnamed parameters, not the named parameters. For example, {{Thankyou|Me|reason=supporting both parameter types}} results in:

Podziękowanie dla Ciebie... za supporting both parameter types. uściski, {{{2}}}

The template is coded to prefer the named parameter for the reason over the unnamed parameter, resulting in the "Me" being lost and no signature being given. This results in a default value of {{{2}}} being shown, as explained below.

Domyślne wartości

Zobacz też: m:Help:Parameter default

If you transclude a template that expects parameters, but do not provide their arguments, in this way:

{{Thankyou}}

in the numbered parameters example above you would get the following:

Podziękowanie dla Ciebie... za {{{1}}}. uściski, {{{2}}}

Since no arguments were passed in, the template presents the parameters themselves, instead of their respective values. In these cases, it may be useful to define default values for the parameters, i.e. values that will be used if no value is passed in. For example, if the template contents are changed to:

'''A little thank you...'''
for {{{reason|everything}}}.
hugs, {{{signature|Me}}}

then {{{reason|everything}}} defines that if no argument is provided for parameter {{{reason}}}, then the value everything will be used. Similarly, {{{signature|Me}}}, defaults parameter {{{signature}}} to value Me. Now, transcluding the template again without passing any argument results in the following:

Podziękowanie dla Ciebie... za everything. uściski, Me

The value of a parameter can be an empty string. For example, in {{foo|bar=}} or {{foo|bar=|baz=qux}}, the foo template considers the bar parameter to be "". This is different from omitting the parameter altogether, which leaves it undefined and triggers the default value mechanism described above.

If you need to treat an empty string the same way as a missing parameter, you can use a conditional operator through an extension like ParserFunctions. For instance, {{#if:{{{1|}}}|{{{1|}}}|undefined}} returns undefined if the parameter is either undefined or empty, while {{{1|undefined}}} does so only if the parameter is undefined.

Often default values are used to specify alternate names of parameters. For example, if you have {{{a|{{{b|}}} }}}, the template will first look for a parameter named "a". If it is not set, it will use the parameter named "b". If neither "a" nor "b" is set, it will output nothing.

Passing parameters to other templates

If raw parameter syntax is generated by the above template call, and then passed through to another template, it is not interpreted as a parameter. This means that {{Thankyou2 }}, which just calls {{Thankyou }} with no parameters, does not work: {{thankyou2|everything|me}} -> Podziękowanie dla Ciebie... za {{{1}}}. uściski, {{{2}}} .

You instead need to explicitly pass the parameter to the other template, i.e if {{Thankyou3 }} contains

{{thankyou|{{{1}}}|{{{2}}}}}}

then {{thankyou3|everything|me}} -> Podziękowanie dla Ciebie... za everything. uściski, me } works properly.

This example does not preserve emptiness vs. undefinedness in parameter values - you would need more complicated syntax if you wanted to do that.

Empty vs undefined parameters

The {{t2demo|| a }} (refer to {{T2demo }} ), with a double pipe, sets the first parameter to an empty string instead of leaving it undefined. It produces the output start--middle- a -end, similar to how {{t2demo|1=|2= a }} results in start--middle- a -end. On the other hand, explicitly setting the parameter "2" to "a," results in the first unnamed parameter being left undefined:

{{t2demo|2= a }} results in start-{{{1}}}-middle- a -end

If the second parameter should not be trimmed, it must be unnamed.

Therefore, you can assign an empty string to the first parameter, but you cannot leave it undefined.

Making emptiness and undefinedness equivalent

Good template coding practices result in passing an empty string to a parameter working the same as not assigning any value. This makes things easier and more consistent.

For example, using p= can show that a template has a parameter "p" that doesn't have a value yet.

To make an empty string and an undefined value equivalent, use the following approaches:

• Use {{{p|}}} exclusively instead of {{{p}}} or q where "q" is a non-empty value.
• Use conditional checks like {{#if:{{{p|}}}|..{{{p}}}..|..}}, to ensure {{{p}}} is only used when it has a value.

If for some reason you want to treat undefined parameters differently from empty parameters or any other possible value you can compare the same parameter twice with different defaults, i.e {{#ifeq:{{{foo|bar}}|{{{Foo|baz}}}|parameter is undefined|parameter is defined}}.

Using equals signs in unnamed parameters

Unnamed parameters can include equals signs, but this must be done indirectly. Here are some methods using template:T1demo:

Default Value for Undefined Parameter

Assign a default value to an undefined parameter:

{{T1demo|{{{1| a=b }}}}}

This renders as: start a=b end.

Using the {{=}} parser function

Use a parser function that safely includes an equals sign:

{{T1demo| a{{=}}b }}

This renders as: start a=b end.

HTML Entities

Replace the equals sign with an HTML entity for display:

{{T1demo| a=b }}

This renders as: start a=b end.

This renders correctly without affecting the other parameters.

Handling unmatched curly and square brackets

Unmatched curly brackets ({{, }}) or square brackets ([[, ]]) must be inside nowiki tags or use HTML entities:

• Rendering curly brackets have two options:
  • Use <nowiki>{{</nowiki> or { for {
  • Use <nowiki>}}</nowiki> or } for }.
• Use [ for [ and ] for ].

Below are some examples:

Unmatched curly brackets

{{T1demo| <nowiki>{{</nowiki>content<nowiki>}}</nowiki> }}

This correctly renders the braces without breaking the template.

Unmatched square brackets

{{T1demo| text [link] more text }}

This correctly renders the braces without breaking the template.

This renders as: start text [link] more text end

Unmatched pairs not placed in nowiki tags either prevent template expansion or are taken as closing braces for the template call.

Below are some examples:

{{T1demo|abc]]def[[ghi}}

This will not expand correctly because of unmatched brackets.

The correct use:

{{T1demo|abc<nowiki>]]</nowiki>def<nowiki>[[</nowiki>ghi}}

This renders as: startabc]]def[[ghiend

Template-generated brackets

An alternate technique for passing arguments with unmatched brackets is to wrap them in another template. In that situation, (which exists with {{(( }} and {{)) }}) on this wiki), the unmatched brackets will be rendered literally, and not decoded as another template call. For example:

{{t1demo|{{((}}t1demo{{))}}}}

results in: start{{t1demo}}end

When substituting a template, template inclusions are parsed once when the subst happens (with the same caveats explained above) and then a second time when rendering the resulting wikitext. For example:

{{subst:((}}t1demo|foo}}

will expand on save to:

{{((}}t1demo|foo}}

which will then render as:

startfooend

If the wikitext generated via the first subst itself includes "subst:" syntax it will not be processed on the same save, but may be on the next save. This technique may be used to implement recursive substitutions that take multiple saves to evaluate.

Using pipes in parameter values

A parameter value cannot contain a pipe character (|), because it would be interpreted as the end of that parameter and the start of the next parameter. This can be worked around by using the parser function {{!}}, or the HTML entity &124;. The two methods of doing this have slightly different behavior, which can be relevant in some corner cases like when a template is producing wikitable syntax.

Example: {{T1demo|abc|def}} produces: startabcend

The "def" doesn't display because it is treated as part of another unnamed parameter, which the template does not use.

{{T1demo|abc{{!}}def}} produces: startabc|defend

The "def" displays properly.

{{T1demo|abc|def}} produces: startabc|defend

The "def" displays properly again.

Formatting template calls using extra parameters

Since templates ignore parameters they are passed but do not handle specifically, they can be used as a way of a adding extra whitespace or unused content to the template call.

For example:

{{template name|foo|bar|baz|mumble|quux}}

is equivalent to, assuming the template doesn't recognize SPACEN as a parameter name:

{{template name|SPACE1=
|foo|SPACE1=
|bar|SPACE2=Random stuff
|baz|SPACE3=
   |mumble|SPACE4=
  quux
}}

It is also possible to use the same name for each spacer (often the empty string), but this will populate Category:Pages using duplicate arguments in template calls, which many wikis prefer to keep empty to catch instances of user error.

This can be used to make the template render in a way similar to its output, like showing each row of w:Template:Chess position on its own like to make the wikitext also look like a chessboard.

Tracking parameter usage

Zobacz też: Help:Tracking categories

It may be wise for a template to add a link or category to a page if a certain parameter or combination of parameters is used, to make if possible to easily determine what pages are using a given parameter, and thus what the impacts of changing that parameter in the template would be.

Evaluation process

This is an advanced topic which you can skip unless you need it.

Generally speaking, template parameters are substituted into the template after tokenization, but as is. They are not evaluated until they are used.

This has a few consequences:

1. If you have a Template:Start containing {{mytemplate, and a Template:End containing |foo=bar}}, and put {{start}}{{end}} on a page, mytemplate isn't transcluded, because tokens like "|" cannot be added by a template and keep their special meaning in templates. You can still use templates to control the name of a parameter or template, but you cannot split a template call amongst multiple templates.
2. Dead-code elimination: If you make a template call like {{foo|{{DISPLAYTITLE:Bar}} }}, and Template:Foo does not contain {{{1}}}, then the DISPLAYTITLE is not used, since it is only evaluated when needed, and there is no parameter to substitute it into, so it is never evaluated. This usually comes into play when using Extension:ParserFunctions, and can be especially noticed when used in combination with the int: magic word that varies by user language. This isn't perfect, and in some cases even if the result of expanding a template is not used (because it is part of an if statement condition, for example), the process of evaluating it can still have side effects. For example, any links produced or other templates used will still be added to Special:WhatLinksHere even if they are not displayed.

Template parameters are pass by value, which means a template cannot modify its arguments. Parameters are treated as associative array, and parameter names are evaluated before parameter values. If the same parameter name is given more than once (either as named or unnamed), only the last instace is used, and the page is added to Category:Pages using duplicate arguments in template calls.

Template calls starting with the magic word subst: or safesubst: are evaluated in a separate first pass that only happens at save time, along with ~~~~ and links using the pipe trick. If they cannot be evaluated during the first pass, subst: calls are ignored, and safesubst: are treated as if a normal template.

Many but not all parser functions, parser tags and trancluded special pages are not directly included like templates but instead are replaced by a "strip marker". This means you cannot manipulate the results with parser functions like padleft: or similar functions from extensions, as they see the strip marker instead of the result of the parser function.

Recursion in templates

Including a template in itself won't throw MediaWiki into infinite recursion. MediaWiki will stop the recursion with the template's name in bold. For example, if the content of Template:Aaaa is a {{Aaaa}} z, it'll display "a a z z".

This safeguard precludes a potentially useful template idiom where a template self-normalizes its own calling arguments. In this forbidden example template:d can either be called {{d|20200311}} or {{d|y=2020|m=3|d=11}}. If called in the first manner, it recurses into itself with the second argument structure (obtained using string parser functions), which then follows a unified processing path.

{{#if:{{{1|}}}|{{d|y={{#sub:{{{1}}}|0|4}}|m={{#sub:{{{1}}}|4|2}}|d={{#sub:{{{1}}}|6|2}}}}|<!-- processing path with arguments y,m,d regardless of original call pattern -->}}

If template:d is modified to recurse into template:d/2 and template:d/2 is an identical manual copy of template:d this idiom works fine as the self-recursion safeguard operates dynamically and not statically.

A feasible way for the MediaWiki software to loosen the self-recursion rule would be to require that each recursive call have a distinct argument count from all previous active calls, at most once recursing with the argument count non-decreasing. That would provide a strong guarantee against infinite self-recursion while enabling useful idioms such as the one described here in a flexible manner.

If the processing path is of low complexity, a simple solution using only one template is to handle each calling convention on a separate if/else branch, duplicating the logic of the processing path within each case. If the processing path is more complex, each call-structure case can delegate to an implementation template with a unified call structure which provides the final template behaviour.

Tables in parameters

Since the pipe character (|) and equality sign (=) have different meanings in template calls and wikitables, in order to use table markup in the value of a template parameter one generally needs to "escape" those characters (i.e., protect them from interpretation as template markup) using special sequences:

• the built-in magic word {{!}} provides an "escaped" version of | since MediaWiki 1.24
• the built-in magic word {{=}} provides an "escaped" version of = since MediaWiki 1.39

Before the introduction of these magic words, many wikis used templates to accomplish the same things. On such a wiki, the magic words take precendence over the same-named templates.

Example table

A	B	C
A1	B1	C1
A2	B2	C1

Table code:

{| class=wikitable
!A!!B!!C
|-
|A1||B1||C1
|-
|A2||B2||C1
|}

Escaped table code:

{{{!}} class{{=}}wikitable
!A!!B!!C
{{!}}-
{{!}}A1{{!}}{{!}}B1{{!}}{{!}}C1
{{!}}-
{{!}}A2{{!}}{{!}}B2{{!}}{{!}}C2
{{!}}}

Note that the first left-brace ({) is interpreted as a literal left-brace character because it is immediately followed by the {{!}} magic word. Similarly, the last right-brace (}) is interpreted as a literal right-brace character because it is immediately preceeded by the same magic word. However, in some cases these brace characters do cause problems, so some wikis provide templates for escaping these characters, as well:

• the template call {{(}} might provide an "escaped" version of {
• the template call {{)}} might provide an "escaped" version of }

Some wikis go even further and provide other convenience templates like {{(!}}, {{!)}}, {{!!}}. On such a wiki, the code can be simplified a bit to this form:

{{(!}} class{{=}}wikitable
!A!!B!!C
{{!}}-
{{!}}A1{{!!}}B1{{!!}}C1
{{!}}-
{{!}}A2{{!!}}B2{{!!}}C2
{{!)}}

Controlling template inclusion

By default, a template's content is displayed in its entirety, both when viewed directly and when included in another page.

The template's page when viewed directly appears exactly as the template would render without any parameters. If the template requires parameters to function properly, this will result in raw wikitext syntax or errors as a result of them being missing.

However, you can control which parts of a template will be seen and included by the use of the ‎<noinclude>, ‎<includeonly> and ‎<onlyinclude> tags.

Anything between ‎<noinclude> and ‎</noinclude> will be seen only when the template's page is being viewed directly, but not when it is included in another page. This is useful when you want to include text or code in a template that you do not want to propagate to any pages which include it, such as:

• Category links when categorizing the template itself

• interlanguage links to similar templates in other languages

• Explanatory text about how to use the template

Likewise, anything between ‎<includeonly> and ‎</includeonly> will be processed and displayed only when the page is being included, but not when the template page is being viewed directly, and is useful in situations such as:

• Categorizing pages which include the template. Note: when changing the categories applied by a template in this fashion, the categorization of the pages which include that template may not be updated until some time later: this is handled by the job queue . To force the re-categorization of a particular page, open that page for editing and save it without changes.

• Ensuring that the template's code is not executed when viewing the template page itself. Typically this is because it expects parameters, and its execution without parameters has an undesired result.

Everything outside ‎<noinclude> and ‎<includeonly> is processed and displayed normally; that is, both when the template page is being viewed directly and when the template is included in another page. The focus is on what is inside these two tags.

Everything outside ‎<onlyinclude> tags is discarded in the transclusion. Even sections tagged includeonly are discarded in the transclusion unless they are also tagged as onlyinclude. The focus is only on what is inside this tag.

For example, if a page like Help:Templates/onlyinclude demo has the wikitext:

abc<onlyinclude>def</onlyinclude>ghi<includeonly>jkl</includeonly>

The result of transcluding it is def.

Nesting of these tags is also possible.

The three partial transclusion tags enable all possible combinations of what is processed and rendered. Comments also fill a role. Inclusion tags are respected when using {{subst:templatename}}, but they are not respected when using {{msgnw:templatename}} as that displays the raw wikitext without any processing.

Section transclusion

To transclude different sections of a template on different pages, you can wrap the content in onlyinclude tags and use an if statement on parameters to select which section.

Consider "Template:Example" with this wikitext:

== Section 1 ==
{{#ifeq:{{{1|1}}}|1|
Content of section one.
}}
{{#ifeq:{{{1|1}}}|1|
== Section 2 ==
Content of section two.
}}

This will render both sections on the example page itself, and allow other pages to transclude the first section with {{example|1}} and the second section with {{example|2}}.

Another approach is to use literal parameter syntax instead:

{{{section1|
== Section 1 ==
Content of section one.
}}}
{{{section2|
== Section 2 ==
Content of section two.
}}}

Transclude the first section with {{example|section2=}} and the second section with {{example|section1=}}. If neither parameter is used, then both sections will display.

A third approach is to use Labeled Section Transclusion.

Organizing templates

For templates to be effective, users need to find them, and find out how to use them.

To find them, users can:

1. Click Strony specjalne > Wszystkie strony
2. In the Przestrzeń nazw: list, choose Template and click Pokaż.

To give usage information, include an example like this one on the template page:

<noinclude>
== Usage ==
Welcome users:
{{Thankyou|reason=your reason|signature=your signature}}
</noinclude>

Then, an editor can simply copy and paste the example to use the template.

While editing a page, a list of all templates used is available under the editing form, in a collapsible section titled "Szablony użyte w tym artykule:" (also named "Szablony użyte w tym podglądzie:", or "Szablony użyte w tej sekcji:" depending on the context). This list provides a convenient link to the template's page, as well as information about its protection status. Redirected templates are shown in italics, with the redirect target added as a separate list item.

Linking to a template

A template page can be linked to like any other wiki page. For example, the link Template:Navbar is generated using the wikicode [[Template:Navbar]].

On many wikis, Template:Tl can be used to provide a link to a template formatted in a way that shows the "double curly-braces" wikicode necessary to transclude the template without actually doing the tranclusion. For example, the code {{tl|Navbar}} may be used to create the link {{Szablon:Tnavbar }}.

This construct is commonly used when referring to templates in template documentation, on help pages, and on talk pages. The same effect can be achieved by using {{[[Template:Navbar|Navbar]]}}, but the {{Tl }} approach involves much less typing. On any given wiki the Tl template, if it exists, may or may not render the text in a "code" element or as monospace type. If not (as on this wiki), another similarly named template may do so. See, for example, the "See also" section of our Template:Tl documentation.

Template naming

The name of a template is case-sensitive excluding the first character.

You make redirects for alternate capitalizations. For example, if a template is named "AdminAbbr", you can create a redirect named "Adminabbr". This way, the template can be called with either {{AdminAbbr}} or {{adminabbr}}. If an editor prefers a mix of upper and lower case for clarity, they can use functions like lc or uc. For instance, instead of {{CURRENTINTERNETTIME}}, they could use {{ {{uc:CurrentInternetTime}} }}

Because template names are interpreted in the same way to the names of other pages, underscores are replaced with spaces, and any text after a number sign (what would be a anchor in a standard link) is ignored.

An underscore _ can be alternative to a blank space.

Possible uses of templates

Templates can be used for any situation in which one wants two or more pages to contain identical or similar content that is edited together rather than independently. They can be used to:

• Provide structured elements on many pages, like infoboxes, maintenance templates, navigational boxes, etc.
• Perform calculations used as a programming tool on various pages, like w:Template:Sum.
• Build composite pages that display the content of multiple existing pages together, like w:WP:Village pump (all) which includes content from each section of the village pump. The content of these pages can either be shown individually, or together, but the revision history, watchlist, etc. will only pick up changes to the transcluded pages and the raw wikitext of the composite page itself, not implicit changes to the composite page.
• Share some content between a few related pages. For example, the list at Help:Preferences#Beta features is duplicated at Beta Features#Current Beta Features. While on MediaWiki.org that is built using Extension:LabeledSectionTransclusion instead, it could have been done using a template.
• Store content referenced multiple times on the same page, so it only has to be written and calculated once. For example w:Template:Cite Monumentenregister/URL is called twice by w:Template:Cite Monumentenregister in two different places, and using another template means the URL pattern only has to be written once in the base template.
• Use templates as a programming element to generate a loop: if Template:A calls Template:B 10 times with different parameters, then that crudely simulates a for loop. If Template:B calls Template:C 10 times, then you have a nested loop of 100 calls of Template:C. But keep in mind that it is easy to run into the template limits when using templates as advanced programming constructs, and using Scribunto is generally clearer and easier to follow.

Kopiowanie z jednej wiki do innej

It is possible, if allowed by the wiki configuration to transclude templates from other wikis. This configuration setting is disabled on Wikimedia wikis. Otherwise, you need to manually copy the template and its dependencies from the source wiki to the destination wiki to use it.

Templates often require CSS or other templates, so users frequently have trouble copying templates from one wiki to another. The steps below should work for most templates.

Kod MediaWiki

Jeśli masz uprawnienia do importowania (w szczególności importupload) na nowej wiki:

1. Przejdź do Special:Export na oryginalnej wiki i pobierz plik .xml z pełną historią wszystkich niezbędnych szablonów:
   • Wprowadź nazwę szablonu w dużym polu tekstowym, np. "Szablon: Witamy". Zwróć szczególną uwagę na wielkie litery i znaki specjalne - jeśli nazwa szablonu nie jest dokładnie poprawna, eksport może nadal występować, ale plik .xml nie będzie zawierał oczekiwanych danych.

1. • Zaznacz pole "Dołącz szablony".

1. • Odznacz pole "Tylko bieżąca wersja, bez historii".

1. • Kliknij "Eksportuj".
2. Przejdź do Special:Import na nowej wiki i prześlij plik .xml.

Jeśli nie masz uprawnień do importowania na nowej wiki:

1. Przejdź do szablonu, który chcesz skopiować z oryginalnej wiki. Przejdź do strony edycji i skopiuj cały plik wikitekstu.
2. Na nowej wiki przejdź do strony o tej samej nazwie co skopiowany szablon. Kliknij, aby utworzyć/edytować i wkleić skopiowany plik wikitekstu. W podsumowaniu edycji każdego szablonu umieść link do oryginalnej strony w celu uznania autorstwa.
3. Wróć do oryginalnej wiki w oknie edycji, pod polem edycji, spójrz na listę "Szablony używane na tej stronie". Dla każdego wymienionego szablonu postępuj zgodnie z tymi instrukcjami. Zrób to również dla dowolnego szablonu używanego przez dowolny z tych szablonów i tak dalej.

1. On the new wiki, go to the page with the same name as the template you copied. Hit create/edit and paste the wikitext you copied. In the edit summary of each template, link to the original page for attribution.

1. Back in the original wiki at the edit window, below the edit box, look at the list of "Templates used on this page". For each template listed follow these instructions. Also do that for any template used by any of these templates, and so on.

Spowoduje to skopiowanie całego niezbędnego kodu i będzie wystarczająca dla niektórych szablonów. Note that only page elements parsed in rendering the page get exported, consequently documentation subpages are not exported as part of this process. Jeśli to nie zadziała, sprawdź również czerwone linki wymienione w sekcji "Strony przeniesione do bieżącej wersji tej strony:" poniżej pola edycji. Jeśli są, powtórz powyższe kroki.

Po pomyślnym zaimportowaniu szablonu i wszystkich powiązanych z nim szablonów z innej wiki, zmodyfikuj go, aby dostosować go do swojej wiki. Na przykład, aby zmienić logo, usuń zbędne kategorie lub czerwone linki.

Rozszerzenia

An extension often used in templates is ParserFunctions. Visit page Rozszerzenie:Funkcje parsera and check if any of the functions listed there are used in the templates you've copied. If so, you have to install the ParserFunctions extension. To install it, you'll need system admin access to the server of your MediaWiki installation.

Another dependency that may be used in templates, especially those on Wikipedia, is Lua. Having {{#invoke: }} in template code is a good sign for it. In case it's used, you need to install the Scribunto extension and system admin access is required too. See that page for more instructions about installing and using the extension.

Kod CSS i JavaScript

Besides MediaWiki code, many templates make use of CSS and some rely on JavaScript to work fully. If the copied templates are not behaving as expected, this may be the cause. To copy the required CSS and JavaScript to your wiki you'll normally need to have admin privileges, because you'll be editing system messages in the "MediaWiki:" namespace.

1. Look for the use of CSS classes (text like class="foobar") in the template text. If those classes appear in "MediaWiki:Common.css" or "MediaWiki:Monobook.css" on the original wiki, copy those classes to "MediaWiki:Common.css" on the new wiki and check if the template is now fine.

1. If the copied template is still not working as expected, check if there is code in "MediaWiki:Common.js" or "MediaWiki:Monobook.js" on the original wiki. If so, you can try copying it to "MediaWiki:Common.js" on the new wiki. Normally, it is a good idea to only copy code from trusted sources, and browse the code to identify and select the relevant parts. You may find comments that can serve as clues to identify the functionality of each part.

Redirection

If a page uses a redirect as a template, the redirect is resolved before processing the template and the target is used instead. This won't work if the target doesn't exist (a broken redirect), or is itself a redirect (a double redirect).

A page that just includes another page as a template might look like a redirect, but there are several differences between them:

• The header of the result displays the title of the page it came from.
• No "Redirected from" message is shown.
• Buttons like edit, watch, talk, history, "what links here," and "last modified" point to the referring page. To access the target page, use a section edit link and navigate from there.
• Unless includeonly and/or noinclude tags are used, the referring page shares the same categories as the target page.
• "Double redirects" work when one or both are this type of pseudo-redirect.

Embedding works on pages that support redirects and doesn't work on pages without it.

Parser functions

Strona główna: Help:Parser functions

MediaWiki also supports parser functions, which function similarly to templates but follow slightly different syntax:

• Parser functions utilize a ":" instead of the initial "|".
• An edit page does not display parser functions used on that page.
• There is no "What links here" feature for parser functions to identify the pages where they are utilized.
• Parser functions templates do not generally accept named parameters, so equal signs generally have no special significance. For example:

{{ #if: not blank | x=abc }} gives x=abc

Zobacz też

General template usage

• m:Help:Calculation
• Help:Substitution
• w:Help:Template – a little more detail than here

• m:Help:Advanced templates – describes even more advanced techniques such as dynamic template calls and variable parameter names

• Help:Multiple-instance templates - on the use of multiple instances of the same template on a page.
• m:Help:Parameter default
• m:Help:Template documentation
• w:WP:Template documentation
• m:Help:Newlines and spaces#Automatic newline

Special constructs used in templates

• Pomoc:Magiczne słowa – fancy stuff you may find in some templates
• Help:Rozszerzenie:Funkcje parsera – additional fancy control functions such as #if and #switch
• Help:Parser functions in templates – guidance on using parser functions in templates
• Pomoc:TemplateData
• Help:Extension:Parser Functions
• Extension:Scribunto

Other relevant information

• Help:ExpandTemplates
• Help:Wyszukiwanie zewnętrzne – a template special use case example
• Manual:Importing Wikipedia infoboxes tutorial
• Extension:PageTemplates
• Manual:Creating pages with preloaded text – Using templates as the starting text of a page
• Help:Osadzanie – embedding pages from namespaces other than Template:
• Manual:Template limits
• Help:What links here
• Special:Mostlinkedtemplates - shows the templates with the most uses
• Special:Unusedtemplates - shows templates with no uses (although they may be substituted)
• Manual:$wgEnableScaryTranscluding (using templates from other wikis)
• w:WP:Anatomy of a template
• w:Wikipedia:Transclusion costs and benefits
• Manual:Parser.php
• Help:Extension:TemplateSandbox for previewing your changes to a template as it renders elsewhere

Linki zewnętrzne

• Miraheze template repository - MediaWiki templates intended for general use.