Template:Error if empty/doc

The template {{Error if empty}} is used to avoid unwanted transclusions of the {{Error}} template in those cases in which the {{#if}} (or a similar) parser function is not directly used for determining the error conditions. In these cases, this templates will appear permanently transcluded instead of {{Error}}.

Usage

This template checks whether the first parameter is empty. If it is, it calls {{Error}} using the second parameter; otherwise it shows the first parameter, trimmed of trailing and leading spaces.

• {{Error if empty|Hello world|Error: Lorem ipsum dolor sit amet.}}

  ↳ Hello world

• {{Error if empty||Error: Lorem ipsum dolor sit amet.}}

  ↳

• {{Error if empty|}}

  ↳

• {{Error if empty}}

  ↳

See also

• Category:If-then-else templates