JSFiddle - React, Tailwind, and code Playground

by Dimitar Christoff

HTML

<select class="wide" id="selectBox" name="option"> 
  <optgroup label="Common">
      <option value="one">One</option>
      <option value="two">Two</option>
      <option value="three">Three</option>
  </optgroup>
  <optgroup label="Less Common">
      <option value="other">Other</option>
  </optgroup>
</select>

JavaScript

$('selectBox').addEvent('change',function() { 
    alert(this.get("value"));
    alert(this.getSelected().get("value"));
});