Template:Error if empty
 | This template uses Lua: |
The templates {{Error if empty}} is used to avoid unwanted transclusions of the {{Error}} template in the cases in which the {{#if}} (or a similar) parser function is not directly used for determining the error conditions. In these cases, these templates will appear permanently transcluded instead of {{Error}}.
Usage
This template checks whether the first parameter is empty. If it is, it redirects all other parameters, shifted, to {{Error}}; 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: Lorem ipsum dolor sit amet.
{{Error if empty|}}- ↳ Error: There is no text to show.
{{Error if empty}}- ↳ Error: There is no text to show.