Template:Code: Difference between revisions

{{{1}}}

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Usage

Wraps a short span of text in <syntaxhighlight>...</syntaxhighlight> tags, see mw:Extension:SyntaxHighlight. This template should only be used for short samples; longer content should use <pre> or <syntaxhighlight>. See Help:Wiki markup for an explanation of what the various tags do.

If the content includes an equals sign (=), you must specify the parameter explicitly: {{code|1=int i = 0;}}.

The template uses the <syntaxhighlight> tag with the attribute inline=1. This works like the combination of the <code> and <nowiki> tags, applied to the expanded wikitext. For example, {{code|some '''wiki''' text}} will not render the word "wiki" in bold, and will render the tripled-single-quotes:

some '''wiki''' text

If the above example is declared as wikitext (via {{code|some '''wiki''' text|lang=wikitext}}), the output is rendered as follows:

some '''wiki''' text

However, {{code|a {{template}} call|lang=wikitext}} will still invoke the template:

a <span class="nowrap">&#123;&#123;</span>[[Template:{{{1}}}|{{{1}}}]]<span class="nowrap">&#125;&#125;</span> call

Use <nowiki>...</nowiki> around the template name to avoid this problem:

a {{template}} call

When used inline with regular text, {{code}} generally looks best and is easiest to read when it is explicitly spaced apart from the regular text:

foo  {{code|bar baz}}  quux.

is well spaced:

foo  bar baz  quux.

versus:

foo {{code|bar baz}} quux.

which is less visually clear:

foo bar baz quux.

because "foo" and "bar" will seem more closely associated than "bar" and "baz"; the width of the space character in a monospaced font is almost always larger than in a proportional font.

Use parameter {{{2}}} (unnamed, as |2=, or more explicitly as |lang=) to specify a language for mw:Extension:SyntaxHighlight. This option defaults to |lang=text, i.e. no highlighting. Valid values include |lang=wikitext for wikitext, |lang=html for HTML, along with many other languages including php, perl, css, javascript, mysql. Attempting to use an invalid value for lang will cause the page to be added to Category:Pages with syntax highlighting errors, and no syntax highlighting will be present in the output. html4strict and html5 used to be valid values - however, |lang=html should be used instead.

This template does not need to be substituted.

Examples

Markup	Renders as
Lorem {{code|ipsum '''dolor'''}} sit amet	Lorem ipsum '''dolor''' sit amet
Lorem {{code|ipsum '''dolor'''|wikitext}} sit amet	Lorem ipsum '''dolor''' sit amet
The declaration {{code|lang=cpp |int foo(const std::string& bar, const std::vector<long double*>& baz);}} is the prototype for a function defined later.	The declaration int foo(const std::string& bar, const std::vector<long double*>& baz); is the prototype for a function defined later.
If the code contains an [[equals sign]], such as {{code |lang=javascript |code=var img = document.getElementsByTagName("img");}}, you must identify the first parameter explicitly as {{{1}}} or {{{code}}}; see also [[:bugzilla:5138]].	If the code contains an equals sign, such as var img = document.getElementsByTagName("img");, you must identify the first parameter explicitly as {{{1}}} or {{{code}}}; see also bugzilla:5138.

Included templates

Embedded templates do not function as expected inside {{code}}; for longer, free-form blocks of code, which can contain templates such as {{var}} and {{samp}}, use <code>...</code> as a wrapper instead of this template.

Templates used inside {{code}} expose the rendered HTML— this can be useful. For example:

Markup	Renders as
{{code| {{cite web |title=Title |url=http://example.org}} |lang=html }}	'"`UNIQ--templatestyles-00000038-QINU`"'<cite class="citation web cs1">[http://example.org "Title"].</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Title&rft_id=http%3A%2F%2Fexample.org&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATemplate%3ACode" class="Z3988"></span>

The above example shows the HTML rendered by the citation template, including the hidden metadata.

Expensive Parser Function warning

This template internally uses mw:Extension:SyntaxHighlight, which is considered an 'expensive parser function' (see WP:EXPENSIVE). If used on a page which uses more than 500 expensive parser functions, the output of subsequent uses of this template will be presented using <code>...</code> formatting (without any syntax highlighting) instead.

TemplateData

This is the TemplateData for this template used by TemplateWizard, VisualEditor and other tools. See a monthly parameter usage report for Template:Code in articles based on its TemplateData.

TemplateData for Code

An inline source code string with automatic syntax highlighting.

Parameter		Description	Type	Status
Code	1 code	The code to display.	Content	required
Language	2 lang	The programming language of the source code. List of valid values is at: mw:Extension:SyntaxHighlight#Supported_languages. The suggested values are a subset of those. Suggested values assembly bash batch c cmake cobol csv csharp css delphi diff dockerfile go graphql haskell html ini java javascript json latex lua makefile markdown matlab objective-c perl php postscript powershell python qsharp r regex ruby rust shell sql swift text typescript visualbasic wikitext xml yaml Default text	String	suggested
Class attribute	class		String	optional
CSS style attribute	style		String	optional

Format: inline

See also

• {{mono}}, monospaced font only
• Help:Wiki markup
• Language-specific wrapper templates:
  • {{jscode}}, defaults to 'javascript'
  • {{tlcode}}, defaults to 'wikitext' (for templates)

The above documentation is transcluded from Template:Code/doc. (edit | history)
Editors can experiment in this template's sandbox (edit | diff) and testcases (edit) pages.
Add categories to the /doc subpage. Subpages of this template.