Change event on <select>
Just access the selectedIndex
property on the select element (this
object in the event handler) to get the option index.
// get the index of the selected option
var index = this.selectedIndex;
// get the option element
var opt = this.options[index];
Either of these will work:
find by :selected pseudo selector in descendants
this.getElement(':selected');
get first selected value
this.getSelected()[0];
pure javascript, use the selectedIndex property
this.options[this.selectedIndex];