Template:Error

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Populates a category

This template will add a category when used:
(though on what conditions — consult with the template itself)

• Category:Template errors

External template

This template originates from an external source:

• https://www.mediawiki.org/wiki/Template:Error

This meta template returns a state of error, and optionally an error-message text in red (visible for the user). It is used by other templates to signal an error, for example invalid input, which can then either be displayed to the editor or caught and handled by other templates.

Usage

• {{error|An exemplary error}} →
• {{error|message=An exemplary error}} →
• {{#iferror:{{error|Foo}} | yes | no }} → yes

Tag option

The tag to contain the error message can be given through the tag parameter, but it will only accept span, div, p, and strong, since those are the only tags recognized by the #iferror parser function. It defaults to strong, the tag generated e.g. by #expre. To prevent strong message, use one of the other tags, e.g. tag=span.

• ABC {{error|An exemplary error demo no tag (default)}} XYZ → ABC XYZ
• ABC {{error|An exemplary error demo span|tag=span}} XYZ → ABC XYZ
• ABC {{error|An exemplary error demo div|tag=div}} XYZ → ABC XYZ
• ABC {{error|An exemplary error demo p|tag=p}} XYZ → ABC XYZ
• ABC {{error|An exemplary error demo strong|tag=strong}} XYZ → ABC XYZ

The template returns a state of error (recognized as such by a wiki parser function), an error-message text in red (visible for the user) and adds the page to "Template errors" category.

Template parameters[Edit template data]

This template prefers inline formatting of parameters.

Parameter		Description	Type	Status
Tag	tag	The tag to contain the error message; will only accept “span”, “div”, “p”, and “strong”, since those are the only tags recognized by the “#iferror:” parser function. It defaults to “strong”, the tag generated by the “#expr:”, “#invoke:”, etc. parser functions. Suggested values span strong div p Default strong	String	optional
Message	1 message	Error message text in red	Content	required
Page to exempt from adding the error category to	no category on page	Here you can specify a page on which the category for template errors won't be added. This also includes all its subpages. Example Template:FooBar	Page name	optional