Help:Templates/id

Jika Anda memiliki teks standar yang ingin disertakan pada beberapa laman, fitur templat MediaWiki memegang peranan. Tidak seperti ekstensi dan berkas media, tidak ada tempat penyimpanan terpusat untuk templat. Templat bisa ditulis baru atau agar tidak bersusah payah melakukan pekerjaan yang sama, diekspor dari wiki lain, misalnya Wikipedia, dan kemudian diimpor ke wiki target.

Pembuatan
Templat adalah halaman wiki biasa yang isinya dirancang untuk ditransklusikan (ditanamkan) di dalam di halaman lain. Templat mengikuti sebuah konvensi yaitu namanya diawali dengan " ", memasukkannya ke ruang nama itu; selain ini, Anda bisa membuatnya seperti halaman wiki lainnya.

Berikut adalah penggunaan templat yang sangat sederhana. JIka Anda membuat halaman berjudul "Templat:Selamat Datang" dengan isi:

Halo! Selamat datang di wiki ini.

Anda telah membuat templat pertama Anda! Jika Anda kemudian memasukkan kode:

di halaman lain manapun, ketika halaman tersebut dibuka, teks "Halo! Selamat datang di wiki ini." akan muncul bukannya. Isi templat "ditransklusikan" ke halaman yang lain, atau bisa dibilang isinya dipakai di halaman lain.

Anda kemudian bisa memasukkan  ke titik manapun di halaman manapun yang Anda ingin jadikan tempat menyambut seseorang. Misalkan templatnya digunakan di 100 halaman. Jika Anda mengubah isi templatnya menjadi:

Hai! Selamat datang di wiki yang indah ini.

dan mengunjungi halaman manapun di antara ke-100 halaman yang menggunakan templat itu, Anda akan melihat teks yang baru dan bukan yang sebelumnya. Dengan begitu, Anda telah mengubah isi 100 halaman tanpa menyunting mereka, karena templatnya sudah ditransklusikan ke halaman-halaman itu.

Ini adalah mekanisme dasarnya. Ada beberapa fitur transklusi lain yang memperkaya mekanisme ini dan menjadikan templat sangat berguna.

Penggunaan
Templat bisa digunakan di halaman lain dengan cara-cara ini:


 * — sebagaimana dijelaskan sebelumnya, pranala ini akan diganti secara dinamis dengan isi terkini dari Template:Nama ketika halaman dengan pranala templatnya dimuat. Pranalanya tidak akan berubah di kode sumber halaman.
 * — ketika pranala templat ini digunakan, pranalanya akan diganti untuk selamanya dengan isi Templat:Nama ketika halaman dnegan pranalanya disimpan: sebuah salinan isi Templat:Nama akan mensubstitusikan pranala templat. Isinya sekarang adalah bagian dari halaman yang dimasuki, dan bisa disunting seperti biasa, terpisah dari isi templat yang asli. Catatan: perubahan beriktunya di halaman templat sumber tidak akan memengaruhi halaman yang diberi pranala templat.
 * — ini diperkenalkan untuk memungkinkan substitusi yang tidak merusak transklusi, lihat w:en:Help:Substitution.
 * includes the template in a form that displays it as raw wiki syntax (the way  does) when the page containing it is fetched.

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


 * includes
 * includes
 * includes
 * replaces itself with the contents of

If no such namespace exists, the full title is assumed to be a template:


 * includes

Parameter
To enrich the mechanism of transclusion, MediaWiki allows parameters to be passed to a template when it is transcluded. Parameters allow the template to produce different contents or have different behaviors.

Suppose you wish to insert a little thank you note in the talk page of other users, such as:

The thank you note will have a reason (in this case, "all your effort") and a signature ("Me"). Your objective is that any user be able to thank any other user, for any reason whatsoever.

So that the note will look similar everywhere it is used, you can define a template called, for example. Although the note should look similar whenever a user thanks another user, its specific contents (i.e. the reason and the signature) will be different. For that reason, you should pass them as parameters. If we ignore the remaining elements to format the box and place the image, the core content of the template will be this:

Notice the use of  and. This is the way to identify, within templates, the parameters that will be passed in when the template is used. Note that, within the template, each parameter is surrounded by three braces:. This is different from normal template name usage.

When using the template on a page, you fill in the parameter values, separated by a "pipe" character. MediaWiki allows parameters to be passed to the template in three ways: Anonymously, Numbered, and Named.

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

In this case, the  template receives parameters   and , producing:

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

would produce this result:

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

This time, template  receives parameters   and , though they have been supplied in inverse order, and produces:

Parameter bernama
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. hugs,

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

In this case, template  receives parameters   and   and produces:

Named parameters are case-sensitive, so:

produces:

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.

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

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

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:

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

Often default values are used to specify alternate names of parameters. For example, if you have, 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.

Evaluation
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. First of all, if you have a  containing , and a   containing  , and put   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.

The second consequence of this is dead-code elimination. If you make a template call like, and Template:Foo does not contain  , then the displaytitle is not used, since it is only evaluated when needed, and it 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  magic word that varies by user language.

Template calls starting with the magic word  or   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 " ", it'll show as "Template:Aaaa" and display Template loop detected: Template:Aaaa.

Pengendalian penyertaan templat
By default, a template's content is displayed in its entirety, both when viewed directly and when included in another page. However, you can control which parts of a template will be seen and included by the use of the,   and   tags.

Anything between  and   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  and   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 . 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  and   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  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 on what is outside this tag.

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.

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

To find them, users can:
 * 1) Click ' > '
 * 2) In the ' list, choose Template and click '.

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

Usage
Welcome users:

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

Linking to a template
A template page can be linked to like any other wiki page. For example, the link is generated using the wikicode.

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  may be used to create the link Navbar.

This construct is commonly used in template documentation, on help pages, and on talk pages when referring to templates. The same effect can be achieved by using, 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, as shown here. If not, another similarly named template may do so. See, for example, the "See also" section of the documentation of en:Template:Tl at the English Wikipedia.

Penyalinan dari satu wiki ke yang lain
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.

MediaWiki code
If you have import rights (Specifically importupload) on the new wiki:


 * 1) Go to Special:Export on the original wiki, and download an .xml file with the complete history of all necessary templates, as follows:
 * 2) * Enter the name of the template in the big text box, e.g. "Template:Welcome". Pay special attention to capitalization and special characters — if the template name isn't exactly correct, the export may still occur but the .xml file will not have the expected data.
 * 3) * Check the box "".
 * 4) * Uncheck the box "".
 * 5) * Click "".
 * 6) Go to Special:Import on the new wiki and upload the .xml file.

If you don't have import rights on the new wiki:


 * 1) Go to the template you want to copy from the original wiki. Go to the edit page, and copy all the wikitext
 * 2) 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.
 * 3) 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.

This will copy the entire code necessary, and will suffice for some templates. If it doesn't work also check for red links listed under "Pages transcluded onto the current version of this page:", below the edit box. If there are any repeat the above steps for these as well and also copy the code in the modules.

After successfully importing the template and all its linked templates from the other wiki, edit it to change customisations to suit your wiki. For example to change a logo, remove redundant categories or red links.

Extensions
An extension often used in templates is ParserFunctions. Visit page and check if any of the functions listed there are used in the templates you've copied. If so, you have to install the 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   in template code is a good sign for it. In case it's used, you need to install the extension and system admin access is required too. See that page for more instructions about installing and using the extension.

CSS and JavaScript code
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  ) 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.
 * 2) 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 first browsing the code to identify and select the parts that are relevant. You may find comments that can serve as clues to identify the functionality of each part.

Lihat pula

 * – a template special use case example
 * – fancy stuff you may find in some templates
 * – additional fancy control functions such as #if and #switch
 * – guidance on using parser functions in templates
 * m:Help:Template – contains a much more thorough manual on how exactly templates function
 * m:Help:Advanced templates – describes even more advanced techniques such as dynamic template calls and variable parameter names
 * m:Help:Embed page – embedding pages from namespaces other than.
 * Manual:Creating pages with preloaded text – Using templates as the starting text of a page
 * Manual:Creating pages with preloaded text – Using templates as the starting text of a page
 * Manual:Creating pages with preloaded text – Using templates as the starting text of a page
 * Manual:Creating pages with preloaded text – Using templates as the starting text of a page
 * Manual:Creating pages with preloaded text – Using templates as the starting text of a page