In the Vinony graph
It is catalogued under the topic If-then-else templates.
Its subject is documented across 33 Wikipedia language editions.
~1 min read
Encyclopedic overview
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With this template #if can be used in a way such that it does not strip spaces and newlines from the "then" and "else" part. For evaluating the condition spaces and newlines are stripped like with ParserFunctions.
Excerpted from Wikipedia’s “Template:Ifnotempty” article, available under the CC BY-SA 4.0 licence.