Template:Void/doc: Difference between revisions
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Caleb Cooper (talk | contribs) Created page with "{{Documentation subpage}} {{Template shortcut|^|Nul|Null}} {{High-use}} {{Commons Import}} This template does nothing visually. Technically, it throws away its parameters and..." |
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It is useful for programming advanced templates, and is often used within a template to the right of an equals sign. It may also be used in a template to disambiguate parsing of braces.
It can also be used to temporarily disable code. Unlike "[[Wikipedia:commenting out|commenting out]]" with <code><nowiki><!-- --></nowiki></code>, it nests. This means that <code><nowiki>{{void|foo {{void|bar}} baz}}</nowiki></code> is valid, whereas <code><nowiki><!-- foo <!-- bar --> baz --></nowiki></code> will produce <code><!-- foo <!-- bar --> baz --></code>.
It provides a particularly concise way of temporarily disabling ''templates'', by prefixing the template name with <code>^|</code>, making the template name becomes the (ignored) first unnamed parameter. For example, suppose you have a page {{tlx|Under construction}} for several days, and wish to change that to {{tlx|In use}} during active editing sessions. Rather than delete the unused template, you can leave both templates in the wikisource and change from <code><nowiki>{{^|In use|...}}{{Under construction|...}}</nowiki></code> to <code><nowiki>{{In use|...}}{{^|Under construction|...}}</nowiki></code>.
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==Alternatives==
{{Tl|Null}} also redirects here. It is also possible to use <code><nowiki>{{ns:0}}</nowiki></code>, the empty/void/null string for the main [[
It can be used in place of <code><nowiki><nowiki/></nowiki></code> to break character sequence parsing, for example <code><nowiki>{{nowrap|{''a''}{{null}}}}</nowiki></code> to force the first closing brace to be treated as part of the template parameter instead of as the end of the template expression.
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