Template:Is empty

Template documentation[view] [edit] [history] [purge]

Returns true if the first parameter is assigned no value. It can be useful in de-obfuscating wiki markup. It was created to facilitate adding tracking categories.

Usage

Logic

if not x then 1.

if x then <null>.

Examples

{{#if:{{is empty| }}|empty|not empty}} → empty

{{#if:{{is empty|value}}|empty|not empty}} → not empty

The above documentation is transcluded from Template:Is empty/doc. (edit | history)
Editors can experiment in this template's sandbox (create | mirror) and testcases (create) pages.
Add categories to the /doc subpage. Subpages of this template.