Template:HTML comment/doc

From English Wikipedia @ Freddythechick

__EXPECTUNUSEDTEMPLATE__

Use this substitution to insert HTML comments (<syntaxhighlight lang="html" inline></syntaxhighlight>) – hidden to readers – into Wikipedia pages.

Usage

<syntaxhighlight lang="wikitext" inline>{{subst:html comment|Lorem ipsum dolor sit amet}}</syntaxhighlight>
↳ <syntaxhighlight lang="html" inline></syntaxhighlight>

By default a space will be added before and after the given text. Use collapsed=yes to remove it (useful in vertical comments). For example,

<syntaxhighlight lang="wikitext">{{subst:html comment|collapsed=yes|

Lorem ipsum dolor sit amet

}}</syntaxhighlight>

will generate

<syntaxhighlight lang="wikitext"></syntaxhighlight>

In substitutable templates, use <syntaxhighlight lang="wikitext" inline></syntaxhighlight>.

Notable cases

Using this substitution allows the expansion of MediaWiki commands inside HTML comments, where they would be preserved verbatim otherwise. Compare:

<syntaxhighlight lang="wikitext" inline>{{subst:html comment|{{subst:FULLPAGENAME}}}}</syntaxhighlight>
↳ <syntaxhighlight lang="html" inline></syntaxhighlight>

and:

<syntaxhighlight lang="wikitext" inline></syntaxhighlight>
↳ <syntaxhighlight lang="html" inline></syntaxhighlight>

See also