模板:Is empty
概要
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.
参数及使用方法
- Logic
- if not
x
then1
. - if
x
then <null>.
示例
{{#if:{{is empty| }}|empty|not empty}}
→ empty
{{#if:{{is empty|value}}|empty|not empty}}
→ not empty