Template:Expand wikitext/doc

This is a documentation subpage for Template:Expand wikitext.
It may contain usage information, categories and other content that is not part of the original template page.

This template is used on approximately 114,000 pages.
To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.

This template uses Lua:

Module:Expand wikitext

Interprets the input as wikitext using the frame:preprocess function. Any arguments passed to {{Expand wikitext}} are available in the preprocessed code, letting this be used as a rudimentary way of using variables.

If the entire input is in a nowiki tag, or if the optional parameter |unstrip=yes is specified, first extracts the contents of nowiki tags before preprocessing.

Examples

{{Expand wikitext|If there is no wiki markup, the template doesn't do anything.}} → If there is no wiki markup, the template doesn't do anything.
{{Expand wikitext|Wiki markup wrapped in nowiki is not expanded without the unstrip parameter: <nowiki>Foo ''bar''</nowiki>}} → Wiki markup wrapped in nowiki is not expanded without the unstrip parameter: Foo ''bar''
{{Expand wikitext|Wiki markup wrapped in nowiki is expanded with the unstrip parameter: <nowiki>Foo ''bar''</nowiki>|unstrip=yes}} → Wiki markup wrapped in nowiki is expanded with the unstrip parameter: Foo bar
{{Expand wikitext|<nowiki>If the whole text is wrapped in nowiki, it is expanded without the unstrip parameter: Foo ''bar''</nowiki>}} → If the whole text is wrapped in nowiki, it is expanded without the unstrip parameter: Foo bar
{{Expand wikitext|<nowiki>{{As of|2015|02}}</nowiki>}} → As of February 2015^[update]
{{Expand wikitext|Wikitext produced by a template invocation is expanded: {{Make code|<<As of!2015!02>>}}}} → Wikitext produced by a template invocation is expanded: As of February 2015^[update]
{{Expand wikitext|<nowiki>The value of foo is {{{foo}}}</nowiki>|foo=123}} → The value of foo is 123
{{Expand wikitext|<nowiki>The value of foo minus 56 is {{#expr:({{{foo}}})-56}}</nowiki>|foo=123}} → The value of foo minus 56 is 67

The template may produce unexpected results in case the wikitext contains a dash - right before or after a template invocation, i.e. -{ or }-, because these are interpreted as language converter markup. See T168759 and mw:Writing systems/Syntax for details. As a workaround, replace - by -.

{{Expand wikitext|<nowiki>This works. - {{2x|x}} -</nowiki>}} → This works. - xx -
{{Expand wikitext|<nowiki>This doesn't work. -{{2x|x}}</nowiki>}} → This doesn't work. -{{2x|x}}
{{Expand wikitext|<nowiki>This doesn't work. {{2x|x}}-</nowiki>}} → This doesn't work. {{2x|x}}-
{{Expand wikitext|<nowiki>This works. -{{2x|x}}-</nowiki>}} → This works. -xx-

The template escapes HTML tags in input that is wrapped in <nowiki>, which may produce unexpected results:

{{Expand wikitext|'''bold''', bold, ''italic'', italic}} → bold, bold, italic, italic
{{Expand wikitext|'''bold''', bold, <nowiki>''italic'', italic</nowiki>|unstrip=yes}} → bold, bold, italic, italic
{{Expand wikitext|<nowiki>'''bold''', bold, ''italic'', italic</nowiki>}} → bold, bold, italic, italic

Examples

See also