JSFiddle - React, Tailwind, and code Playground

HTML

<select name="select" id="selectId">
<option id="" value="calendar_Second_Calendar_1285942672.xml">Second Calendar</option>
<option id="" value="calendar_First_Calendar_1285932160.xml">First Calendar</option>
</select>

JavaScript

var domNode = document.getElementById("selectId");
var value = domNode.selectedIndex;
var selected_text = domNode.options[value].text;
alert(selected_text);