Template:Parameter typo documentation/sandbox
Templates {{1}}, {{2}}, {{3}}, etc. warn readers/editors that a typo exists in the page they are reading/editing. If {{{{{1}}}}} is called, you probably meant the parameter {{{1}}} (as {{{{{{1}}}}}} with triple braces), but in fact only double braces were used, invoking {{{{{1}}}}}. In addition to a warning, it also adds pages to Category:Templates with incorrect parameter syntax. For more information on how template parameters work, see mw:Help:Templates#Parameters.
However, the most problems have been caused by omitting the first brace "{" of a parameter and getting {{{{{1}}}}}}, as invoking Template:{{{1}}} +"}" rather than parameter {{{1}}}. This can be an insidious problem, especially when the transclusion of Template:{{{1}}} is hidden, so that the effect is invisible to the person editing a page. For that reason, Template:{{{1}}} now issues a warning to the user.
With that warning, the prior invisible access to Template:{{{1}}} can now be understood to be a formerly unseen problem coded within a page.
- Note: this will also pick up several variations such as {{{{{1}}}|}} for {{{{{{1}}}|}}} and {{{{{{1}}}}}.
Periodically, people check [[Special:WhatLinksHere/Template:{{{1}}}|what-links-here]] to see if anyone has accidentally invoked Template:{{{1}}}.
 | This is the template sandbox page for Template:Parameter typo documentation (diff). See also the companion subpage for test cases. |
