§ The no Expression

The no operator returns true if a value is null, undefined, or an object of length 0 (an empty string or array). You can also accomplish the same thing using the is empty and is not empty comparison operators.

§ Examples

<div
  _="on click
          if no .tabs log 'No tabs found!'"
>
  Check for Tabs
</div>

§ Syntax

no <expression>