§ The class reference Expression

A class reference uses CSS selector syntax to refer to a class. It typically evaluates to a NodeList of all elements with that class, unless it's used on the right-hand side of an assignment (where it refers to the class itself).

§ Examples

<div _="on click add .clicked">Add the .clicked class to me!</div>

<div _="on click log .clicked">
  Log all elements with the clicked class on it in the DOM
</div>

§ Syntax

.<class-name>