Formula:Error/doc

Haec est subpagina documentationis de "Formula:Error". Haec subpagina informationes categoriasque et alias res continet quae in pagina principali respectiva non continentur.

Hanc paginam, in spatio Formulae nominali, oportet Latine convertere.

The template returns a state of error (recognized as such by a wiki parser function), and optionally an error-message text in red (visible for the user).

Usage

• {{error|An exemplary error}} →
• Compare, used in a Parser Function: {{#expr:Foo}} →
• {{#iferror:{{error|Foo}} | {{yes}} | {{no}} }} → Formula: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

See also

• Help:Parser function
• mw:Help:Extension:ParserFunctions##iferror: