The positional Expressions


  (first | last | random) [(in | of | from)] <expression>


Positional expressions allow you to select an element from an array or array-like object. If they are applied to a DOM element, the children of the DOM object will be used.

<div _="on click log first in me">... Log my first child ...</div>

<div _="on click log last in me">
  Log my last child